Calculated Industries 4065 Construction Master Pro v3.0 User's Guide

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User s Guide

For Models:

4065 v3.1 Construction Master Pro

4080 v3.1 Construction Master Pro Trig

44080 v3.1 Construction Master Pro Desktop

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This User’s Guide helps you solve common construction math and material estimation problems using the latest

Construction Master Pro calculators—three of the most powerful feet-inch-fraction calculators to date:

The

Construction Master Pro III Series —

1.

Construction Master Pro (#4065 v3.1)

2.

Construction Master Pro Trig (#4080 v3.1)

3.

Construction Master Pro Desktop (#44080 v3.1)

IMPORTANT: The Construction Master Pro Trig does not have

Block, Concrete Footing, Drywall, or Length, Width, and Height functions. These keys are replaced with standard trigonometric keys.

INTRODUCTION

The

Construction Master Pro line includes the most advanced feetinch-fraction calculators designed specifically for building pro’s!

The

Pro calculators handle practically any problem involving measurements and can be used to save time, prevent errors, and accurately perform common building projects such as: estimating concrete volume, squaring-up foundations, framing roofs, ordering lumber, building stairs, walls, laying driveways, carpet or floor covering, figuring precise angle calculations, or simply working in feet-inchfractions or decimal feet!

Your Calculator Helps You Solve:

• Dimensional Math Problems

• Conversions Between Feet-Inch-Fractions, Decimal Feet,

Decimal Inches, and Yards

• Imperial/Metric Conversions

• Problems Involving All Common Fractions — 1/2” to 1/64”!

• Area/Volume Calculations

• Board Feet/Lumber Calculations

• Circle Calculations

• Column/Cone Area and Volume

• Compound Miter Cuts for Crown Moulding

• Material Estimations and Costs

• Polygons

• Rake-Walls

• Right Angle/Triangle Solutions

• Roofing Materials

• Stair Layout (Risers/Treads)

• Studs

• Weight/Volume Conversions

Pro and Desktop Models (

NOT AVAILABLE ON TRIG MODEL

#4080)

Also Solve:

• Block/Bricks, Concrete Footings and Drywall

• Instant Square-up, Perimeter, Wall Area, Room Area and

Volume

TABLE OF CONTENTS

GETTING STARTED..........................................................................1

KEY DEFINITIONS .........................................................................1

Basic Operation Keys ..................................................................1

Convert

Ç

Key –

Unit Conversions and Second Functions ....1

Memory and Storage Functions...................................................2

Recall

®

Key.............................................................................3

Dimensional Measurement Unit Keys..........................................3

Area and Volume Keys (


#4080)......4

Weight Keys .................................................................................5

Construction Project Keys and Functions....................................6

Block/Brick Function (


#4080) ..........6

Circular/Arc Function Keys ..........................................................7

Column/Cone Function ................................................................8

Compound Miter/Crown Moulding Keys ......................................8

Drywall Function (


#4080) ................9

Footing Function (


#4080)................9

Polygon Function .........................................................................9

Right Triangle/Roof Framing Keys .............................................10

Hip/Valley and Jack Rafter Keys ................................................11

Rake-Wall Function....................................................................13

Roof Materials/Covering Function..............................................14

Stair Key ....................................................................................14

Studs Function ...........................................................................16

Trigonometric Keys (

TRIG

#4080

AND DESKTOP

#44080

MODELS ONLY

) ...........................................................................16

ENTERING DIMENSIONS ............................................................18

Entering Linear Dimensions.......................................................18

Entering Square/Cubic Dimensions ...........................................18

SETTING FRACTIONAL RESOLUTION.......................................20

Setting Fraction Resolution –

Using the Preference

Setting Mode...........................................................................20

Converting a Fractional Value to a Different Resolution............21

CONVERSIONS (LINEAR, AREA, VOLUME) ..............................22

Linear Conversions ....................................................................22

Converting Feet-Inch-Fractions to Decimal Feet .......................22

Converting Decimal Feet to Feet-Inch-Fractions .......................22

Converting Fractional Inches to Decimal Inches .......................23

Converting Decimal Inches to Fractional Inches .......................23

Square Conversions ..................................................................23

Cubic Conversions .....................................................................23

PERFORMING BASIC MATH WITH DIMENSIONS .....................24

Adding Dimensions ....................................................................24

Subtracting Dimensions .............................................................24

Multiplying Dimensions ..............................................................24

Dividing Dimensions ..................................................................24

Percentage Calculations ............................................................25

MEMORY OPERATION ................................................................25

Basic Cumulative Memory (M+).................................................26

Permanent Storage Registers (M1 and M2) ..............................26

PAPERLESS TAPE OPERATION .................................................27

EXAMPLES – USING THE CONSTRUCTION MASTER PRO......29

LINEAR MEASUREMENT EXAMPLES ........................................29

Adding Linear Measurements ....................................................29

Cutting Boards ...........................................................................29

Window Measurement ...............................................................30

Calculating the Center Point ......................................................30

AREA CALCULATIONS ................................................................31

Square Area (x

2

) ........................................................................31

Area of a Rectangular Room (LxW) ..........................................31

Using Multi-Function

W

Key to Find Area, Square-up and

Perimeter (


#4080)......................31

VOLUME CALCULATIONS...........................................................32

Rectangular Containers (LxWxH) ..............................................32

Using the Multi-Function h

Key to Find Volume,

Wall Area and Room Area

(


#4080) ......................................32

Volume of a Cylinder..................................................................33

Volume of a Cone ......................................................................33

WEIGHT/VOLUME CONVERSIONS ............................................34

Weight Conversions ...................................................................34

Weight per Volume/Volume Conversions...................................34

BLOCKS/BRICKS (


#4080)...............35

Number of Blocks, Based on Entered Length and Height ........35

Number of Blocks, Based on Entered Area ...............................35

Number of Blocks, Based on Calculated Perimeter ..................36

Number of Blocks, Based on Entered Length ...........................36

Number of “Face” Bricks ...........................................................37

Number of “Paver” Bricks .........................................................37

BOARD FEET – LUMBER ESTIMATION .....................................38

Total Board Feet – With Dollar Cost ..........................................38

Number of Board Feet Based on Entered Volume ....................38

CIRCLE AND ARC CALCULATIONS............................................39

Circumference and Area of a Circle...........................................39

Arc Length – Degree and Diameter Known...............................39

Arc Length – Chord Length and Segment Rise Known.............39

Arc Calculations – Arc Length and Diameter Known ................40

ARCHED SEGMENT WALLS .......................................................41

Arched Segment Walls – Arched Windows (No Base)..............41

Arched Segment Walls – Arched Windows (With Base) ...........42

Arched Segment Walls – Chord Length and Segment Height

Known .....................................................................................43

COMPOUND MITER.....................................................................45

Compound Miter Cuts ................................................................45

CONCRETE/PAVING ....................................................................46

Volume of Concrete for a Driveway ...........................................46

Concrete Columns .....................................................................47

Complex Concrete Volume ........................................................48

Polygon, Finding Angles Based on Entered Radius and

Number of Sides .....................................................................49

Concrete Footings (


#4080) ...........50

Squaring-up a Foundation .........................................................51

DRYWALL (


#4080)...........................52

Number of Drywall Sheets for a Given Area..............................52

Number of Drywall Sheets for a Given Length ..........................52

GRADE/SLOPE.............................................................................53

Back-Fill on a Slope – Percent of Grade Known .......................53

RIGHT TRIANGLE AND ROOF FRAMING EXAMPLES ..............54

Roof Framing Definitions ...........................................................55

Degree of Pitch ..........................................................................57

Percent Grade............................................................................57

Pitch Ratio or Slope ...................................................................57

Common Rafter Length..............................................................58

Common Rafter Length – Pitch Unknown .................................58

Angle and Diagonal (Hypotenuse) .............................................59

Rise ............................................................................................59

Rise and Diagonal......................................................................59

Sheathing Cut ............................................................................60

Regular Hip/Valley and Jack Rafters ........................................60

Jack Rafters – Using Other Than 16-Inch On-Center

Spacing ..................................................................................61

Irregular Hip/Valley and Jack Rafters – Descending, with

On-center Spacing Maintained ...............................................62

Irregular Hip/Valley and Jack Rafters – Ascending, with

Jacks Mating at Hip/Valley......................................................64

Rake-Wall – No Base.................................................................66

Rake-Wall – With Base ..............................................................67

ROOFING MATERIALS ................................................................68

Roof Covering – Entering Pitch, Length and Width ..................68

Roof Covering – Entering Rise, Run (No Pitch) and Area.........69

STAIR LAYOUT EXAMPLES ........................................................70

Stair Layout Definitions ..............................................................70

Stairs – Given Only Floor-to-Floor Rise.....................................72

Stairs – Given Only the Run ......................................................74

Stairs – Given Rise and Run .....................................................75

Stairs – Given Rise and Run, Using “Riser Limited” Function for Code Restrictions ..............................................................76

Baluster Spacing ........................................................................77

STUDS ..........................................................................................78

BASIC D:M:S AND TRIGONOMETRY EXAMPLES .....................78

Converting Degrees:Minutes:Seconds ......................................78

Time Calculations Using D:M:S .................................................78

TRIGONOMETRIC FUNCTIONS..................................................79

Converting Percent Grade to D:M:S ..........................................80

Converting Tangent/Pitch to Angle.............................................80

Converting Roof Angle in Degrees to Pitch in Inches................80

Angle – Rise and Hypotenuse Known .......................................81

APPENDIX A – DEFAULT SETTINGS ............................................82

APPENDIX B – PREFERENCE SETTINGS....................................83

How to Set Preferences .............................................................86

Accessing Preference Settings ..................................................86

APPENDIX C – CARE INSTRUCTIONS .........................................89

APPENDIX D – IMPORTANT NOTES FOR OWNERS OF

PREVIOUS CONSTRUCTION MASTERS ..................................90

APPENDIX E – ACCURACY/ERRORS, AUTO SHUT-OFF,

BATTERIES, RESET ....................................................................91

ACCURACY/ERRORS..................................................................91

Error Codes................................................................................91

AUTO SHUT-OFF .........................................................................91

BATTERIES...................................................................................92

Replacing the Battery(ies)..........................................................92

Battery Replacement Instructions ..............................................92

RESET ..........................................................................................92

APPENDIX F – AREA/VOLUME FORMULAS................................93

AREA FORMULAS........................................................................93

SURFACE AREA/VOLUME FORMULAS .....................................94

REPAIR AND RETURN ...................................................................95

WARRANTY .....................................................................................96

INDEX...............................................................................................99

GETTING STARTED

KEY DEFINITIONS

Basic Operation Keys

o

On/Clear — Turns power on. Pressing once clears the display. Pressing twice clears all temporary values.

O

Off — Turns all power off, clearing all non-permanent registers.

+ – x

÷ =

%

Arithmetic operation keys.

Four-function (+, -, x, ÷) percent key. (See page 25 for examples.)

0

–

9 and

•

Keys used for entering digits.

)

(

DESKTOP ONLY

) Enters “00” to save keystrokes (e.g.,

1 ) to enter 100).

B

Backspace Key — Used to delete entries one keystroke at a time (unlike the o function, which deletes the entire entry).

Convert

Ç

Key — Unit Conversions and Second Functions

The

Ç key is used to convert between measurement units or to access the second functions listed below:

Ç x

Clear All — Clears all values, including Memory.

Resets all permanent entries to default values

(except Preference Settings which are retained).

Note: Use only when necessary, as it resets all stored values to factory defaults. See page 82 for a listing of default values.

Ç %

Ç B

Ç /

Ç ÷

x 2

— Squares the value in the display. For example, to square the value 10, enter

1 0 then

Ç %

.

Square Root Function (

) — Used to find the square root of a non-dimensional or area value

(e.g.,

1 0 0 Ç B =

10).

x10 y

— Allows entry of an exponent. For example,

8 Ç / 1 4 is 8 times 10 to the 14th power.

1/x — Finds the reciprocal of a number (e.g.,

8

Ç ÷ =

0.125).

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Ç –

Ç +

Ç •

Ç 0

Ç ß

Change Sign (+/–) — Toggles the sign of the displayed value to positive or negative.

Pi (

π

) — Constant = 3.141593

Degrees:Minutes:Seconds (dms

deg) —

Converts between D:M:S and decimal degree formats.

Total Cost (Cost) — Calculates total material cost given a unit dimension and an entered Per Unit Cost.

Access Preference Settings (Prefs) — Used to access various customizable settings, such as dimensional answer formats (see Preference

Settings on page 83).

Memory and Storage Functions

µ

Cumulative Memory — Whenever the pressed, the displayed value will be added to the

Memory. Other memory functions:

µ key is

FUNCTION

Add to Memory

Subtract from Memory

Recall total in Memory

Display/Clear Memory

Clear Memory

KEYSTROKES

µ

Ç µ

® µ

® ®

Ç ®

Memory is semi-permanent, clearing only when you:

1) turn off the calculator;

2) press

® ®

;

3) press

Ç ®

;

4) press

Ç x

(Clear All).

When memory is recalled (

® µ

), consecutive presses of

µ will display the calculated average and total count of the accumulated values.

ß 1

–

3

Storage Registers (M1) through (M3) — Stores the displayed value in non-cumulative, permanent

Memory (e.g.,

1 0 ß 1

). Good for storing a single value, for future reference (

® 1 =

10).

Note: Non-cumulative means it only accepts one value (does not add or subtract) and a second entered value will replace the first.

Permanent means the value is stored even after the calculator is shut off. To delete a stored value, enter a new value or perform a

Clear All (

Ç x

) .

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Recall

®

Key

The

® key is used to recall or review stored values (e.g.,

® p to recall a previously entered pitch value). It is also used in reviewing stored settings, or in Paperless Tape and Memory operation (see below).

® =

Paperless Tape (Tape) — Accesses the paperless tape mode (see “Paperless Tape” page 27), which keeps track of your past 20 entries. Useful for checking strings of numbers.

® ®

® µ

® 1

–

3

Clear M+ — Displays and clears M+.

Recall M+ — Displays value stored in M+.

Recall (M1) through (M3) — Recalls the value stored in M1, M2, or M3.

Dimensional Measurement Unit Keys

The following keys are used for entering units of measure, with ease and accuracy: y f

Yards — Enters or converts to Yards.

Feet — Enters or converts to Feet. Also used with the i and

/ keys for entering Feet-Inch values

(e.g.,

6 f 9 i 1 / 2

).

Note: Repeated presses of f after

Ç toggle between Feet-

Inches and Decimal Feet (e.g.,

6 f 9 i 1 / 2 Ç f =

6.791667 Feet; press f again to return to Feet-Inch-Fractions).

i

Inches — Enters or converts to Inches. Also used with the

/ key for entering fractional Inch values

(e.g.,

9 i 1 / 2

).

Note: Repeated presses of i after

Ç toggle between

Fractional and Decimal Inches (e.g.,

9 i 1 / 2 Ç i =

9.5 Inch; press i again to return to Fractional Inches).

/

Fraction Bar — Used to enter fractions. Fractions may be entered as proper (1/2, 1/8, 1/16) or improper

(3/2, 9/8). If the denominator (bottom) is not entered, the calculator's fractional resolution setting is automatically used (e.g., entering

1 5 / = or

+ will display 15/16, based on the default fractional resolution setting of 16ths.

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m

Ç 7

Ç 9

Ç 2

Ç 8

Meters — Enters or converts to Meters.

Centimeters (cm) — Enters or converts to

Centimeters.

Millimeters (mm) — Enters or converts to

Millimeters.

Acres (Acre) — Enters or converts (a square value) to Acres.

Board Feet (Bd Ft) — Enters or converts cubic values to Board Feet. One Board Foot is equal to

144 Cubic Inches.

Area and Volume Keys (

NOT AVAILABLE ON TRIG MODEL

#4080)

l

Length — Enters a length for calculation of area or volume.

W

Width — A multi-function key used to enter a width for calculation of area or volume (if a length and height are also entered). Consecutive presses of this key display or calculate: h

4

5

6

2

3

Press Result

1 Displays Entered Width (WDTH)

Area (AREA)

Square-up (SQUP)

Perimeter (PER)

Redisplays Entered Length (LNTH)

Redisplays Entered Width (WDTH)

Height — A multi-function key used to enter a height for calculation of volume (if a length and width are also entered). Consecutive presses of this key display or calculate:

4

5

6

2

3

Press Result

1 Displays Entered Height (HGHT)

Volume (VOL)

Wall Area (WALL)

Total Room Area (ROOM)

Redisplays Entered Length (LNTH)

Redisplays Entered Width (WDTH)

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Weight Keys

Ç 1

Ç 3

Ç 4

Ç 6

ß 0

Kilograms (kg) — Enters or converts (a weight or volume value) to Kilograms. A dimensioned volume will convert using the stored Weight per Volume value.

Metric Tons (met tons) — Enters or converts (a weight or volume value) to Metric Tons. A dimensioned volume will convert using the stored Weight per Volume value.

Pounds (lbs) — Enters or converts (a weight or volume value) to Pounds. A dimensioned volume will convert using the stored Weight per Volume value.

Tons (tons) — Enters or converts (a weight or volume value) to Tons. A dimensioned volume will convert using the stored Weight per Volume value.

Store Weight per Volume (wt/vol) — Stores a new

Weight per Volume value as Tons per Cubic Yard or other format, as listed below:

Note: After entering a value and pressing

ß 0

, continue pressing the

0 digit key until you’ve reached the desired weight per volume format. To recall your setting, press

® 0

.

• Ton Per CU YD

• LB Per CU YD

• LB Per CU FEET

• MET Ton Per CU M

• kG Per CU M

This value is permanently stored until you change it or perform a Clear All (

Ç x

).

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Construction Project Keys and Functions

The following Construction Project Keys and Functions help you instantly figure quantities and costs of materials, so you can build like a pro!

Block/Brick Function (


#4080)

The Blocks function helps you quickly estimate the quantity of blocks or bricks required for building walls, walkways or other areas.

Ç l

Number of Blocks or Bricks (Blocks) —

Calculates the number of blocks (or bricks) based on:

• an entered or calculated linear value

• an entered or calculated area

• an entered value in l

• values entered in l and h

(solved area)

Uses a standard block/mortar area of 128 Square

Inches and a block length of 16 Inches. This function can also be used for calculating the number of “face” or “paver” bricks by storing a brick size

(see below).

ß 4

Store Block or Brick Size (Blk Size) — Used to store: (1) a block area other than the default block area of 128 Square Inches (e.g.,

1 2 0 i i

ß 4 stores an area of 120 Square Inches) and

(2) a block length other than the default block length of 16 Inches (e.g.,

1 8 i ß 4 stores a length of 18 inches). These values are permanently stored until you change them or perform a Clear All (

Ç x

). To recall the stored settings, press

® 4

(repeated presses of

® 4 toggle between block area and block length).

Note: For Brick Estimates — You may also enter a brick size using

ß 4

. For example, when building with standard “face” bricks, enter a brick size of 21 Square Inches (

2 1 i i

ß 4

) or store a “paver” brick size of 32 Square Inches (

3 2 i i ß 4

; based on Modular U.S. brick size of

3-5/8 Inches x 2-1/4 Inches x 7-5/8 Inches, including 3/8-inch mortar = 4 Inches x 2-5/8 Inches x 8 Inches).

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Circular/Arc Function Keys

The circle key helps you quickly solve circular area, volume or arc problems.

C

Circle — Displays and calculates the following values, given an entered circle diameter* or radius:

• Diameter (DIA)

• Circle area (AREA)

• Circumference (CIRC)

*To enter a diameter (e.g., 10 Feet), press

1 0 f C

.

Ç a a

Radius — Enters or calculates the circle radius

(e.g.,

5 f Ç a

).

Arc Length or Degree of Arc — A multi-function key that enters or calculates

Arc Length or Degree of Arc, and further solves for additional circular/arc values, including arched segment walls (based on the stored On-center spacing), listed below.

6

7

4

5

2

3

Press Result

1 Arc Length or Degree of Arc (ARC)

Chord Length (CORD)

Segment Area (SEG)

Pie Slice Area (PIE)

Segment Rise (RISE)

Stored On-Center Spacing (OC)

Length of Arched Wall 1* (AW 1)

R r

* The calculator will calculate arched segment wall lengths (if applicable) with consecutive presses of the a key until it reaches the last wall length.

Run (Chord Length) — Enters or calculates the

Chord Length. Used in conjunction with an entered segment rise to solve for the radius of a circle or with an entered radius to solve for the segment rise.

Rise (Segment Rise) — Enters or calculates the segment rise. Used in conjunction with an entered

Chord Length to solve for the radius of a circle or with an entered radius to solve for the Chord Length.

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Column/Cone Function

The Column and Cone function helps you quickly estimate volume and surface area of columns or cones.

Ç C

Column and Cone (Column/Cone) — With an entered diameter and height, the first and second presses of

C

(following

Ç

) will calculate the total volume and surface area of a Column; the third and fourth consecutive presses of

C calculate the total volume and surface area of a Cone.

For Trig Model (#4080) Users:

As this model does not have a h key, you must enter the height using the r key.

Compound Miter/Crown Moulding Keys

The

Construction Master Pro also calculates compound miter cut angle solutions for cutting and installing crown moulding on a wall.

The Compound Miter function can also be used for finding angle cuts for many types of compound miter problems, such as siding, railing and trim.

Â

Compound Miter — With stored spring (crown) angle and entered wall corner angle*, consecutive presses of

Â will calculate the following:

2

3

Press Result

1 Miter Angle (MITR)

4

Bevel Angle (BEVL)

Redisplays Stored Spring Angle (SPRG)

Redisplays Entered Wall Corner Angle (CRNR)

* Wall Corner Angle entries of less than 25 into

Â will be assumed to be the number of sides of a polygon; in this case, the calculator will calculate the unknown Wall Corner Angle first, then proceed with the above angle calculations.

ß Â

Store Spring Angle (Spring Angle) — Stores a value other than the default spring (crown) angle of

45° (e.g.,

3 8 ß Â stores 38° spring angle).

This value is permanently stored until you change it or perform a Clear All (

Ç x

). To recall the stored setting, press

® Â

.

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Drywall Function (


#4080)

Ç h

Drywall Sheets (Drywall) — Calculates the number of 4 x 8, 4 x 9, and 4 x 12 sheets for an entered or calculated area.

Footing Function (


#4080)

The Footing function helps you quickly estimate the volume of concrete required for concrete footings.

Ç W

Footing — Calculates total quantity of concrete required for concrete footings based on an entered wall length and footing size. Size based on the default footing size of 264 Square Inches (industry standard).

ß 6

Store Footing Area (Ftg Area) — Used to store a value other than the default footing size of 264

Square Inches (e.g.,

1 2 8 i i ß 6 stores a footing size of 128 Square Inches). This value is permanently stored until you change it or perform a

Clear All (

Ç x

). To recall the stored setting, press

® 6

.

Polygon Function

The Polygon function is handy for calculating multi-sided shapes

(such as found in concrete applications).

Ç R

Polygon — With an entered diameter or radius and number of sides of a polygon-shaped figure,

Ç

R

, calculates the following:

6

7

4

5

2

3

Press Result

1 Full Angle (FULL)

Bi-Sect, or Half Angle (HALF)

Side Length (SIDE)

Perimeter of Polygon (PER)

Area of Polygon (AREA)

Radius* (RAD)

Redisplays Entered Number of Sides (SIDE)

*Solves radius for an entered diameter or redisplays the entered radius.

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Right Triangle/Roof Framing Keys

Right Triangle:

Using the Pythagorean theorem, the top row of keys on your

Construction Master Pro will calculate instant solutions in dimensional format to right triangle problems (particularly, roof framing).

The Construction Master Pro’s keys are labeled in easy to remember roofing terms. The right triangle is calculated simply by entering two of four variables: Rise, Run, Diagonal, or Pitch.

p

Pitch — Enters or calculates the Pitch (slope) of a roof (or right triangle). Pitch is the amount of “rise” over 12 Inches (or one meter) of “run.” Pitch may be entered as:

• a dimension:

9 i p

• an angle or degrees:

3 0 p

• a percentage (percent grade):

7 5 % p

• a pitch ratio:

0 • 7 5 Ç p

Once a Pitch in one of the above formats is entered, consecutive presses of p will convert to the remaining Pitch formats listed above (e.g., Pitch in

Inches will convert to Pitch Degrees, Percent Grade and Pitch Ratio/Slope).

Note: An entered (vs. calculated) pitch is a permanent entry. This means that it will remain stored even after you turn the calculator off. To change the Pitch, simply enter a new Pitch value.

In contrast, a calculated Pitch value is not permanently stored.

This means that the calculator will return to the Pitch value you

last entered when you clear the calculator or press o twice.

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Ç p r

R d

Pitch Ratio or Slope (Slope) — Enters the Pitch as a ratio or Slope of a roof (or right triangle). For example, 0.58 slope is entered as

• 5 8 Ç p

.

Rise — Enters or calculates the Rise or vertical leg

(height) of a right triangle.

Run —Enters or calculates the Run or horizontal leg

(base) of a right triangle.

Diagonal — Enters or calculates the diagonal leg

(hypotenuse) of a right triangle. Typical applications are “squaring up” slabs or finding common rafter lengths. Additional presses of the d key will also display plumb and level cut angles in degrees.

Note: The Common rafter calculation is the “point-to-point” length and does not include the overhang or ridge adjustment.

Hip/Valley and Jack Rafter Keys

The Construction Master Pro uses the Rise, Run, Diagonal, Pitch and On-center spacing values to calculate Regular and Irregular

Hip/Valley and Jack rafter lengths (excluding wood thickness, etc.).

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When calculating Regular and Irregular Jack rafter lengths, you will see the letters “JK” (Regular pitch side) or “IJ” (Irregular pitch side) and the corresponding jack number to the left of your calculator display. This will help you keep track of the descending sizes and which side the corresponding rafter is based on.

H

Hip/Valley Rafter — Finds the Regular or Irregular

Hip/Valley rafter length.

Ç H j

• Regular Hip/Valley Length: After right triangle/rafter values are entered or calculated

(e.g., Pitch, Rise, Run), pressing

H will calculate the length of the Regular Hip/Valley rafter.

• Irregular Hip/Valley Length: If an irregular pitch is entered (see next definition), pressing

H will calculate the Irregular Hip/Valley rafter length. (An Irregular or “non-standard” roof has two different Pitches/Slopes.)

• Subsequent presses of the

H key will also display plumb, level, and cheek cut angle values in degrees.

Irregular Pitch (Ir/Pitch) — Enters the irregular or secondary pitch value used to calculate lengths of the irregular hip/valley and jack rafters.

You may enter the irregular pitch as:

• a dimension:

9 i Ç H

• an angle:

3 0 Ç H

• a percentage:

7 5 % Ç H

Note: An entered irregular pitch can be recalled by pressing

®

Ç H

.

Jack Rafters — Finds the descending Jack rafter sizes for regular pitched roofs, based on the stored

On-center spacing and previously entered or calculated right triangle/rafter values (e.g., pitch, rise, run).

Repeated presses of the j key will display the incremental jack adjustment, all the rafter sizes (on the Regular pitch side) as well as display the plumb, level, and cheek cut angle values.

Additional presses will display the rafter sizes on the Irregular pitch side (if an Irregular Pitch was entered; see above), or repeat the previously displayed values.

(Cont’d)

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(Cont’d)

ß 5

Note: You may set your calculator to display the Jack Rafter lengths in either ascending or descending order (see Preference

Settings on page 83).

Note: You may set your calculator to “mate up” with the Jack

Rafters, rather than using the entered or default On-center spacing for both sides (see Preference Settings on page 83).

Store On-center (o.c.) Spacing — Used to store a value other than the default of 16 Inches On-center

(e.g.,

1 8 i ß 5 stores an 18-inch On-center) for Jack Rafter calculations. Press

® 5 to review the stored value.

Ç j

Irregular Side Jacks (Ir/Jack) — Operates same as j

, but displays the rafter values from the

Irregular pitched side first.

Rake-Wall Function

Ç r

Rake-Wall (R/Wall) — This function finds the stud sizes in a

Rake-Wall based on calculated or entered values for pitch, rise and/or run. Repeated presses of r will display the various sizes. The sizes can be displayed in either descending (from longest to shortest) or ascending (from shortest to the longest) order, depending upon your preference setting (see

Preference Settings on page 83). If a dimensional value is entered before pressing

Ç r

, this value will be taken as the Rake-Wall base size and automatically added to the various rafter lengths.

ß 5

Store On-center (o.c.) Spacing — Used to store a value other than the default of 16 Inches On-center

(e.g.,

1 8 i ß 5 stores an 18-inch On-center) for Rake-Wall stud calculations. Press

® 5 to review the stored value.

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Roof Materials/Covering Function

The Construction Master Pro's Roof function provides a quick calculation of roof area, number of squares and bundles, and number of

4 x 8 sheets required for roof coverage.

Ç d

Roof — Given an entered Pitch (or Rise and Run) and plan area (or Length and Width), calculates the following:

5

6

7

Press Result

3

4

1

2

Roof Area (ROOF)

Number of Roof Squares (SQRS)

Number of Roof Bundles (BNDL)

Roof Bundle Size* (B-SZ)

Number of 4 x 8 Sheets (4

X

8 )

Pitch (PTCH)

Plan Area (PLAN)

*Roof bundle size is 33.33 Square Feet.

Stair Key

The Construction Master Pro easily calculates stair layout solutions.

With entered values for floor-to-floor rise and/or run, it will calculate

Riser, Tread, Stringer, and Incline Angle values simply by pressing the s key.

s

Stair — A multi-function key that uses a stored Riser

Height, stored Tread Width, stored Headroom

Height and Floor Thickness, and entered Rise and

Run values to calculate and display the following:

7

8

5

6

9

10

11

2

3

4

Press Result

1 Actual Riser Height (R-HT)

Number of Risers (RSRS)

Riser Overage/Underage (R+/-)

Tread Width (T-WD)

Number of Treads (TRDS)

Tread Overage/Underage (T+/-)

Stairwell Opening (OPEN)

Stringer Length (STRG)

Incline Angle* (INCL)

Run of Treads (RUN)

Floor-to-Floor Rise (RISE)

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(Cont’d)

Press Result

12 Stored (Desired) Riser Height (R-HT

13

14

15

Stored (Desired) Tread Width (T-WD

Stored Headroom (HDRM

STORED

Stored Floor Thickness (FLOR

)

STORED

STORED

STORED

)

)

)

Note: Default values are 7-1/2 Inches for Desired Riser Height and 10 Inches for Desired Tread Width, 10 Inches for Floor

Thickness, and 6 Feet 8 Inches for Headroom Height.

Note: It is not possible for the calculator to include the nose/overhang measurement. Thus, you need to adjust for this measurement per local codes.

*If the inclination angle exceeds the stored riser height and Tread

Width ratio by 10%, the yield symbol will appear, indicating a steep incline.

ß 7

ß 8

Store Desired Riser Height (Riser Ht) — Stores a value other than the default desired stair riser height of 7-1/2 Inches (e.g.,

8 i ß 7 stores an

8-inch desired stair riser height). To recall the stored setting, press

® 7

.

Store Floor Thickness/Height (Floor Ht) — Stores a value other than the default desired floor thickness of 10 Inches (e.g.,

8 i ß 8 stores an 8-inch desired floor thickness). To recall the stored setting, press

® 8

. This is used, along with stored headroom height, for calculating the length of the stairwell opening.

ß 9

Store Desired Tread Width (Tread W) — Stores a value other than the default desired stair Tread

Width of 10 Inches (e.g.,

1 2 i ß 9 stores a

12-inch desired stair Tread Width). To recall the stored setting, press

® 9

.

Ç ß ß

Set Headroom Height — Sets the desired

ß ß

Headroom Height for calculation of the stairwell opening.

Default is 6 Feet 8 Inches. Use the

+ key to increase and the

– key to decrease the stored headroom height. See Preference Settings instructions on page 86.

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Ç s

Riser Limited — Used for situations when the riser height is limited by local code. When you press

Ç s

, the calculator will recalculate stair values so that the actual Riser Height will not exceed your stored desired Riser Height (e.g., it will never exceed the stored desired Riser Height of

7-1/2 Inches, if 7-1/2 Inches is the value stored using

ß 7

). To compensate for this limitation, the calculator will add one to the number of risers.

Studs Function

The Construction Master Pro also calculates the number of studs required for a wall using an entered length and stored On-center spacing value.

Ç 5

Studs — Calculates the number of studs for an entered or displayed linear value. Based on the stored On-center spacing (16 inches is the default).

Trigonometric Keys (

TRIG

#4080

AND DESKTOP

#44080

MODELS ONLY

)

Tangent Ø = Opposite

Adjacent

Sine Ø = Opposite

Hypotenuse

Cosine Ø = Adjacent

Hypotenuse

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The Trig model (#4080) and Desktop (#44080) calculators have standard trigonometric keys, in addition to right triangle/rafter keys

(e.g., Rise, Run, Diagonal), for advanced right triangle mathematics.

The Sine, Cosine and Tangent of an angle are defined in relation to the sides of a right triangle.

Using the

Ç key with the trigonometric function displays the inverse (Arcsine, Arccosine, and Arctangent). These are used to find the angle for the Sine, Cosine, or Tangent value entered.

S

Sine Function — Calculates the Sine of an entered degree or non-dimensioned* value.

Ç S

Arcsine (sin -1

) — Calculates the angle for the entered or calculated Sine value.

ç

Cosine Function — Calculates the Cosine of a degree or non-dimensioned* value.

Ç ç

Arccosine (cos -1

) — Calculates the angle for the entered or calculated Cosine value.

t

Tangent Function — Calculates the Tangent of a degree or non-dimensioned* value.

Ç t

Arctangent (tan -1

) — Calculates the angle for the entered or calculated Tangent value.

*Cannot use on dimensioned values.

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ENTERING DIMENSIONS

Entering Linear Dimensions

When entering Feet-Inch-Fraction values, enter dimensions from largest to smallest — e.g., Feet before Inches, and Inches before

Fractions. Enter Fractions by entering the numerator (top), pressing

/

(fraction bar key), and then the denominator (bottom).

Note: If a denominator is not entered, the fractional setting value is used.

Examples of Entering Linear Dimensions:

DIMENSION

Clear calculator

5 Feet 1-1/2 Inch

Clear calculator

5 Yards

Clear calculator

17.5 Meters

KEYSTROKES

o

5 f 1 i 1 / 2 o

5 y o

1 7 • 5 m

Entering Square/Cubic Dimensions

The

Construction Master Pro lets you easily enter Square and Cubic values. Simply press a dimensional unit key two times to label a number as a Square value, or three times to label a Cubic value.

Note: If you pass the desired dimensional format, keep on pressing the dimensional unit key until the desired result is displayed again.

Enter Square and Cubic dimensions in the following order:

(1) Enter numerical value (e.g.,

1 0 0

).

(2) Press desired unit key (e.g., f

) to label value as “linear”.

KEYSTROKE DISPLAY

o o

1 0 0 f

100

0.

FEET

(3) Second press of unit key (e.g., f f

) labels value as “Square”.


o o

1 0 0 f f

100

0.

SQ FEET

(4) Third press of unit key (e.g., f f f

) labels value as “Cubic”.


o o

1 0 0 f f f

Note: Feet-Inches format cannot be used to enter Square or Cubic values.

0.

100

CU FEET

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Examples of Entering Square and Cubic Dimensions:

YARDS

y y

—

Square Yards

(e.g.,

5 y y will display 5

SQ YD

).

y y y

—

Cubic Yards

(e.g.,

5 y y y will display 5

CU YD

).

FEET

f f

—

Square Feet

(e.g.,

5 f f will display 5

SQ FEET

).

f f f

—

Cubic Feet

(e.g.,

5 f f f will display 5

CU FEET

).

INCHES

i i

—

Square Inches

(e.g.,

5 i i will display 5

SQ INCH

).

i i i

—

Cubic Inches

(e.g.,

5 i i i will display 5

CU INCH

).

METERS

m m

—

Square Meters

(e.g.,

5 m m will display 5

SQ M

).

m m m

—

Cubic Meters

(e.g.,

5 m m m will display 5

CU M

).

CENTIMETERS

Ç 7 7

—

Square Centimeters

(e.g.,

5 Ç 7 7 will display 5

SQ CM

).

Ç 7 7 7

—

Cubic Centimeters

(e.g.,

5 Ç 7 7 7 will display 5

CU CM

).

MILLIMETERS

Ç 9 9

—

Square Millimeters

(e.g.,

5 Ç 9 9 will display 5

SQ MM

).

Ç 9 9 9

—

Cubic Millimeters

(e.g.,

5 Ç 9 9 9 will display 5

CU MM

).

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SETTING FRACTIONAL RESOLUTION

The Construction Master Pro is set to display fractional answers in

16ths of an Inch. All examples in this User’s Guide are based on

1/16”. However, you may select the fractional resolution to be displayed in other formats (e.g., 1/64”, 1/32”, etc.). The method for permanently changing fractional resolution is shown below.

Setting Fractional Resolution

— Using the Preference Setting Mode

KEYSTROKE

1. Access Preference Settings:

Ç ß

(Prefs)

DISPLAY

FRAC 0-1/16

INCH

*

2. Access Next Fraction Subsetting:

+

+

+

+

+

+

(repeats options)

FRAC 0-1/32

FRAC 0-1/64

FRAC 0-1/2

FRAC 0-1/4

FRAC 0-1/8

FRAC 0-1/16

INCH

INCH

INCH

INCH

INCH

INCH

3. To Permanently Set the Fractional Resolution You Have Selected

Above, press o

(or any key) to set the displayed Fractional

Resolution and Exit Preference Settings.

o

0.

4. To Recall Your Selected Fractional Resolution:

® /

STD 0-1/16

INCH

*1/16” is the default setting. The display may differ from the example depending on what the resolution is currently set to.

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Converting a Fractional Value to a Different Resolution

Add 44/64th to 1/64th of an Inch and then convert the answer to other fractional resolutions:


o o

4 4 / 6 4

+ 1 / 6 4 =

Ç 1

(1/16)

Ç 2

(1/2)

Ç 3

(1/32)

Ç 4

(1/4)

Ç 6

(1/64)

Ç 8

(1/8) o o

*

* Changing the Fractional Resolution on a displayed value does not alter your

Permanent Fractional Resolution Setting (set via Preference Settings).

0.

0-44/64

INCH

0-45/64

INCH

0-11/16

INCH

0-1/2

INCH

0-23/32

INCH

0-3/4

INCH

0-45/64

INCH

0-3/4

INCH

0.

Note: This setting is temporary; it will revert back to your permanent fractional setting upon press of o

, or when you turn the calculator off.

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CONVERSIONS (LINEAR, AREA, VOLUME)

Linear Conversions

Convert 14 Feet to other dimensions:


o o

1 4 f

Ç y

Ç f

Ç i

Ç m

Ç 7

(cm)

Ç 9

(mm)

Note: When performing multiple conversions, you only have to press the

Ç key once except when accessing secondary functions, such as

Ç 7 for Centimeters.

0.

14

FEET

4.666667

YD

14

FEET

0

INCH

168

INCH

4.267

M

426.72

CM

4267.2

MM

Converting Feet-Inch-Fractions to Decimal Feet

Convert 15 Feet 9-1/2 Inches to Decimal Feet. Then convert back to

Feet-Inch-Fractions.

KEYSTROKE

o o

1 5 f 9 i 1 / 2

Ç f f

*

DISPLAY

0.

15

FEET

9-1/2

INCH

15.79167

FEET

15

FEET

9-1/2

INCH

Converting Decimal Feet to Feet-Inch-Fractions

Convert 17.32 Feet to Feet-Inch-Fractions.


o o

1 7 • 3 2 f

Ç f f

*

* Repeated presses of f or i will toggle between Feet-Inch-Fractions and

Decimal Feet or Inches.

0.

17.32

FEET

17

FEET

3-13/16

INCH

17.32

FEET

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Converting Fractional Inches to Decimal Inches

Convert 8-1/8 Inches to Decimal Inches. Then convert to Decimal Feet.

DISPLAY KEYSTROKE

o o

8 i 1 / 8

Ç i f i

*

8-1/8

8.125

0.677083

8.125

0.

INCH

INCH

FEET

INCH

Converting Decimal Inches to Fractional Inches

Convert 9.0625 Inches to Fractional Inches. Then convert to Decimal

Feet.


o o

9 • 0 6 2 5 i

Ç i f f

*

*Repeated presses of f or i will toggle between Feet-Inch-Fractions and

Decimal Feet or Inches.

0.

9.0625

INCH

9-1/16

INCH

0.755208

FEET

Square Conversions

Convert 14 Square Feet to other Square dimensions:

KEYSTROKE

o o

1 4 f f

Ç i

Ç y

Ç m

Ç 7

(cm)

DISPLAY

0.

14

SQ FEET

2016.

SQ INCH

1.555556

SQ YD

1.300643

SQ M

13006.43

SQ CM

Cubic Conversions

Convert 14 Cubic Feet to other Cubic dimensions:

KEYSTROKE

o o

1 4 f f f

Ç i

Ç y

Ç m

DISPLAY

0.

14

CU FEET

24192.

CU INCH

0.518519

CU YD

0.396436

CU M

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PERFORMING BASIC MATH WITH DIMENSIONS

Adding Dimensions

KEYSTROKE

Add 11 Inches to 2 Feet 1 Inch:

1 1 i + 2 f 1 i =

3

FEET

DISPLAY

0

INCH

Add 5 Feet 7-1/2 Inches to 18 Feet 8 Inches:

5 f 7 i 1 / 2 + 1 8 f 8 i =

24

FEET

3-1/2

INCH

Subtracting Dimensions

KEYSTROKE

Subtract 3 Feet from 11 Feet 7-1/2 Inches:

1 1 f 7 i 1 / 2 – 3 f =

8

FEET

DISPLAY

7-1/2

INCH

Subtract 32 Inches from 81 Inches:

8 1 i – 3 2 i =

49

INCH

Multiplying Dimensions


Multiply 5 Feet 3 Inches by 11 Feet 6-1/2 Inches:

5 f 3 i x 1 1 f 6 i 1 / 2 =

60.59375

SQ FEET

Multiply 2 Feet 7 Inches by 10:

2 f 7 i x 1 0 =

Dividing Dimensions

KEYSTROKE

Divide 30 Feet 4 Inches by 7 Inches:

3 0 f 4 i ÷ 7 i =

Divide 20 Feet 3 Inches by 9:

2 0 f 3 i ÷ 9 =

25

FEET

10

INCH

DISPLAY

52.

2

FEET

3

INCH

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Percentage Calculations

The percent

% key is used to find a given percent of a number or to perform add-on, discount or division percentage calculations. You may also perform percentage calculations with dimensional units

(Feet, Inch, etc.), in any format (linear, Square or Cubic).

Examples:


Find 18% of 500 Feet:

5 0 0 f x 1 8 %

Add 10% to 137 Square Feet:

1 3 7 f f + 1 0 %

Subtract 20% from 552 Feet 6 Inches:

5 5 2 f 6 i – 2 0 %

Divide 350 Cubic Yards by 80%:

3 5 0 y y y ÷ 8 0 %

90

FEET

150.7

442

0

INCH

SQ FEET

FEET

437.5

0

INCH

CU YD

MEMORY OPERATION

Your calculator has two types of Memory operations:

1) a standard, cumulative, semi-permanent Memory

µ

; and

2) three storage registers M1, M2, and M3, used to permanently store single, non-cumulative values.

Memory commands are listed below.

FUNCTION

µ

:

Add value to M+

Subtract value from M+

Clear M+

Display and Clear M+

Recall stored value

M1/M2/M3:

Store single value in M1



Clear register M1

KEYSTROKES

µ

Ç µ

Ç ®

® ®

® µ

ß 1

ß 2

ß 3

0 ß 1

(Cont’d)

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(Cont’d)

FUNCTION

Clear register M2

Clear register M3

Recall stored value in M1



KEYSTROKES

0 ß 2

0 ß 3

® 1

® 2

® 3

Basic Cumulative Memory (M+)

Example:

Store 100 into M+, add 200, and then subtract 50. Display the total, average, and total count. Clear the Memory:


1 0 0 µ

2 0 0 µ

5 0 Ç µ

(M-)

® µ

µ

µ

® ®

Note: To Clear Memory (M+):

- press

® ®

;

-

Ç ®

; or

- turn off the calculator.

TTL

M+ 100.

M+ 200.

STORED

M- 50.

250.

M

M

M

M

AVG 83.33333

CNT 3.

M

M

M+ 250.

Permanent Storage Registers (M1 and M2)

Examples:

Store a rate of $175 into M1 and recall the value:

KEYSTROKE

1 7 5 ß 1

O o

® 1

M-1

M-1

DISPLAY

STORED

STORED

175.

0.

175.

Store 1,575 Square Yards into M2 and recall the value:


1 5 7 5 y y ß 2

O o

® 2

M-2

M-2

STORED

STORED

1575.

1575.

SQ YD

0.

SQ YD

Note: To Clear M1-M3: Values stored in M1-M3 will remain permanently stored, even after you turn the calculator off. You will never need to clear the storage registers; simply enter a new value. However, if you wish to clear M1-M3 to “zero”:

- Enter

0 ß 1

,

0 ß 2

, or

0 ß 3 or

Ç x to clear all registers

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PAPERLESS TAPE OPERATION

Note: Not available on DT (Desktop) Printer — Model #44065.

The Paperless Tape allows you to display and review the last twenty entries of a regular math or basic dimensional math string calculation.

To access this mode after entering values, press

® =

. Then, press

+ or

– to scroll forward or backward through the entries.

While in the Paperless Tape mode, the display will show the previously entered or calculated value, along with the sequential number of entry (e.g., 01, 02, 03, etc.) and the math operator (+, –, x, ÷, %) in the upper left corner of the display.

Note: If

= has been used in the middle of a string, SUB (for Subtotal) will display in the upper left. If

= was the last operation performed, the display will show TTL (Total) as the last entry.

To exit this mode, press

= to exit and maintain the last entry on the display. When exiting, the last entry (or TTL) will be displayed, allowing you to continue using the last tape value for another operation, if desired.

Note: The Paperless Tape is cleared when:

- o is pressed twice;

- upon a new calculation (new equation string is started); or

- when the calculator is shut off.

Example:

KEYSTROKE

1. Enter a string of numbers:

4 f +

5 f +

6 f +

7 f =

2. Access the tape function:

® =

3. Scroll from first value to total:

+

+

+

+

+

DISPLAY

4

FEET

0

INCH

9

FEET

0

INCH

15

FEET

0

INCH

22

FEET

0

INCH

TTL= 22

FEET

0

INCH

01 4

FEET

0

INCH

02+ 5

FEET

0

INCH

03+ 6

FEET

0

INCH

04+ 7

FEET

0

INCH

TTL = 22

FEET

0

INCH

(Cont’d)

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(Cont’d)

KEYSTROKE

4. Scroll last two values:

–

–

5. Exit tape function and continue:

=

+

2 f =

DISPLAY

04+ 7

FEET

0

INCH

03+ 6

FEET

0

INCH

TTL= 22

FEET

0

INCH

22

FEET

0

INCH

24

FEET

0

INCH

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EXAMPLES — USING THE CONSTRUCTION

MASTER PRO

The Construction Master Pro calculators have keys and functions labeled in common building terms. Just follow the examples and adapt the keystrokes to your specific application.

Please note that some of the following examples will not apply to your specific calculator model. For example, the Trig Model (#4080) has trigonometry functions, but does not have l

,

W or h keys, or Blocks, Footing or Drywall functions.

It is good practice to clear your calculator (press o twice) before beginning each problem. And remember to use the Backspace

B key to correct entries one entry at a time.

LINEAR MEASUREMENT EXAMPLES

Adding Linear Measurements

Find the total length of the following measurements: 5 Feet 4-1/2

Inches, 8 Inches and 3.5 Yards.

KEYSTROKE

1. Add the measurements: o o

5 f 4 i 1 / 2 +

8 i +

3 • 5 y

2. Find the total:

=

5

6

16

FEET

FEET

FEET

DISPLAY

4-1/2

0-1/2

6-1/2

0.

INCH

INCH

3.5

YD

INCH

Cutting Boards

How many 2-foot 2-inch pieces can be cut from one 10-foot board?

KEYSTROKE

Divide board length by smaller cuts: o o

1 0 f

÷ 2 f 2 i =

DISPLAY

10

0.

FEET

4.615385

(4 whole pieces)

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Window Measurement

What is the total width of three window openings, if each measures

2 Feet 5 Inches in width?


1. Enter window width: o o

2 f 5 i

2. Find total width: x 3 =

3. Convert to Decimal Feet: f

2

7

FEET

FEET

5

3

7.25

0.

INCH

INCH

FEET

Calculating the Center Point

You have a room that measures 13 Feet 8 Inches by 14 Feet

10 Inches. Find the center point to install a ceiling fan.


1. Divide length in half, to figure first center point: o o

1 3 f 8 i

÷ 2 =

2. Divide width in half, to figure second center point:

1 4 f 1 0 i

÷ 2 =

13

6

FEET

FEET

8

10

0.

INCH

INCH

14

FEET

10

INCH

7

FEET

5

INCH

Therefore, you should install the fan at the intersection of 6 Feet

10 Inches length and 7 Feet 5 Inches width.

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AREA CALCULATIONS

Square Area (x 2 )

What is the area of a square room with sides measuring 7 Feet

4 Inches?

KEYSTROKE

o o

7 f 4 i Ç %

(x 2 )

DISPLAY

0.

53.77778

SQ FEET

Area of a Rectangular Room (LxW)

What is the area of a room measuring 12 Feet 6 Inches by 15 Feet

8 Inches?


o o

1 2 f 6 i x 1 5 f 8 i =

12

FEET

195.8333

6

0.

INCH

SQ FEET

Note: You can also find area using the l and

W keys as seen in the next problem.

However, these keys are not available on the Trig Model (#4080).

Using Multi-Function

W

Key to Find Area, Square-up and

Perimeter (


#4080)

Find the area, square-up and perimeter of a space measuring

20 Feet 6 Inches by 25 Feet 6 Inches:

KEYSTROKE

o o

2 0 f 6 i l

2 5 f 6 i W

W

W

W

DISPLAY

0.

LNTH 20

FEET

6

INCH

WDTH 25

FEET

6

INCH

AREA 522.75

SQ FEET

SQUP 32

FEET

8-5/8

INCH

PER 92

FEET

0

INCH

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VOLUME CALCULATIONS

Rectangular Containers (LxWxH)

What is the volume of a rectangular container that measures 3 Feet by 1 Foot 9-5/8 Inches by 2 Feet 4 Inches?

KEYSTROKE

1. Find volume in Cubic Feet: o o

3 f x 1 f 9 i 5 / 8 x 2 f 4 i =

DISPLAY

0.

3

FEET

1

FEET

9-5/8

INCH

12.61458

CU FEET

*

2. Convert to Cubic Yards:

Ç y

0.467207

CU YD

*If the “Volume Display Format” Preference Setting is set to Cubic Yards or Cubic

Meters, your result will display accordingly. (See Preference Settings on page 83.)

Using the Multi-Function

h

Key to Find Volume, Wall Area and Room Area (


#4080)

Find the volume, wall area and total surface/room area* if you have a length of 15 feet, width of 20 feet and height of 12 feet.

*Room Area includes four walls plus ceiling area.

KEYSTROKE

o o

1 5 f l

2 0 f W

1 2 f h h h h

DISPLAY

0.

LNTH 15

FEET

0

INCH

WDTH 20

FEET

0

INCH

HGHT 12

FEET

0

INCH

VOL 3600.

CU FEET

WALL 840.

SQ FEET

ROOM 1140.

SQ FEET

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Volume of a Cylinder

Calculate the volume of a cylinder with a diameter of 2 Feet 4 Inches and a height of 4 Feet 6 Inches:

Note: For a cylinder, use the Column function.

KEYSTROKE

1. Find Circle area: o o

2 f 4 i

C C

2. Enter height and find volume:

4 f 6 i h

Ç C

2

HGHT 4

FEET

AREA 4.276057

4

0.

INCH

SQ FEET

FEET

COL 19.24226

DISPLAY

6

INCH

CU FEET

Volume of a Cone

Calculate the volume of a Cone with a diameter of 3 Feet 6 Inches and a height of 5 Feet:

KEYSTROKE

1. Find Circle area: o o

3 f 6 i C

C

2. Enter height and find volume:

5 f h

Ç C C C

*

DIA 3

HGHT 5

FEET

AREA 9.621128

6

0.

INCH

SQ FEET

FEET

CONE 16.03521

DISPLAY

0

INCH

CU FEET

*To access Cone volume, you must press the

C key three times after

Ç

.



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WEIGHT/VOLUME CONVERSIONS

Weight Conversions

Convert 2,500 Pounds to Kilograms, Tons and Metric Tons:

KEYSTROKE

1. Enter Pounds: o o

2 5 0 0 Ç 4

(lbs)

2. Convert to Kilograms, Tons and Metric Tons:

Ç 1

(kg)

Ç 6

(tons)

Ç 3

(met tons)

1.133981

DISPLAY

2500

1133.981

0.

LB k

G

1.25

T on

MET T on

Weight per Volume/Volume Conversions

Convert 5 Cubic Yards of concrete to Pounds, Tons and Kilograms, if concrete weighs 1.5 Tons per Cubic Yard.


1. Store Weight per Volume: o o

1 • 5 ß 0

* (wt/vol)

2. Enter concrete volume:

5 y y y

STORED

1.5

T on

P er

5

0.

CU YD

CU YD

3. Convert to Pounds, Tons and Kilograms:

Ç 4

(lbs)

Ç 6

(tons)

Ç 1

(kg)

15000.

7.5

6803.886

T

LB on k

G

*If calculator does not display Tons per Cubic Yard, keep pressing the

0 key until the desired format is displayed (e.g., Ton Per CU YD, LB Per CU YD, LB Per CU FEET,

MET Ton Per CU M, or kG Per CU M).

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BLOCKS/BRICKS (


#4080)

Number of Blocks, Based on Entered Length and Height

You are building an “L” shaped retaining wall out of standard 8-inch x

16-inch size blocks (Note: this is the default block size of 128 Square

Inches). One side of the retaining wall is 22 Feet long, and the other side is 15 Feet 8 Inches long. The wall is to be 4 Feet high. How many blocks are required to build this wall? Add a 5% waste allowance.

Note: The calculated area from an entered length ( l

) and height ( h

) will be used for calculating blocks if these values exist.

KEYSTROKE

1. Find total wall length: o o

® Ç 4

*

(Blk Size)

2 2 f + 1 5 f 8 i = l

2. Enter wall height as height:

4 f h

B--AR

STORED

0.

128.

SQ INCH

37

FEET

8

INCH

LNTH 37

FEET

8

INCH

HGHT 4

FEET

DISPLAY

0

INCH

3. Find the number of blocks and add 5% waste allowance:

Ç l

(Blocks)

+ 5 %

BLKS 169.5

177.975

(178 Blocks)

*If

® Ç l

(Blocks) does not result in 128 Square Inches, then enter the following:

1 2 8 i i ß 4

(Blk Size)

B--AR

STORED

128.

SQ INCH

-OR-

8 i x 1 6 i =

ß 4

(Blk Size)

B--AR

STORED

128.

128.

SQ INCH

SQ INCH

Number of Blocks, Based on Entered Area

Find the number of blocks required for an area measuring 300

Square Feet. Then add a 3% waste allowance.

KEYSTROKE

o o

3 0 0 f f

Ç l

(Blocks)

+ 3 %

DISPLAY

0.

300

SQ FEET

BLKS 337.5

347.625

(348 Blocks)

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Number of Blocks, Based on Calculated Perimeter

Calculate the wall’s perimeter if the length is 30 Feet and width is 45

Feet. Then, find the number of blocks required. Add a 3% waste allowance.


1. Find wall area: o o

3 0 f l

4 5 f W

2. Find the perimeter:

W W W

LNTH 30

WDTH 45

PER 150

FEET

FEET

FEET

0

0

0

0.

INCH

INCH

INCH

3. Find the number of blocks for the displayed perimeter, and add

3% waste allowance:

= Ç l

(Blocks)

+ 3 %

BLKS 112.50

115.875

(116 Blocks)

Number of Blocks, Based on Entered Length

Calculate the number of blocks required for a length of 20 Feet.


1. Enter length then calculate number of blocks: o o

2 0 f

Ç l

(Blocks)

20

0.

FEET

BLKS 15.

2. Display the stored block length*: l

B-LN

STORED

16

INCH

Note: The calculator will calculate the number of blocks based on the entered length and the stored block size (length).

*If the stored block length is not 16 Inches, then enter the following:

1 6 i ß 4

(Blk Size)

B-LN

STORED

16

INCH

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Number of “Face” Bricks

How many “face” bricks (21 Square Inch size) will you need to purchase to cover a 40-Foot by 8-Foot wall, if you include a 3% waste allowance? Use the Blocks function for calculating bricks.


1. Enter and store brick area into Block Size storage key: o o

2 1 i i ß 4

(Blk Size)

B--AR

STORED

0.

21.

SQ INCH

2. Enter length and height of wall:

4 0 f l

8 f h

LNTH 40

HGHT 8

FEET

FEET

0

0

INCH

INCH

3. Find the number of bricks and add a 3% waste allowance:

Ç l

(Blocks)

+ 3 %

BLKS 2194.286

2260.114

(2261 Bricks)

4. Reset block area to default value:

1 2 8 i i ß 4

(Blk Size)

B--AR

STORED

128.

SQ INCH

Number of “Paver” Bricks

How many “paver” bricks (32 Square Inch size) will you need to fill a

5-Foot by 15-Foot walkway?


1. Enter brick area into Block Size storage key: o o

3 2 i i ß 4

(Blk Size)

B--AR

STORED

2. Enter length and width (as height):

5 f l

1 5 f h

3. Find the number of bricks:

Ç l

(Blocks)

LNTH 5

HGHT 15

32.

FEET

FEET

0.

SQ INCH

0

0

INCH

INCH

BLKS 337.5

(338 Bricks)

4. Reset block area to default value:

1 2 8 i i ß 4

(Blk Size)

B--AR

STORED

128.

SQ INCH

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BOARD FEET — LUMBER ESTIMATION

The Construction Master Pro easily calculates board feet for lumber estimation problems. The default entry format for Board Feet is “Inch x

Inch x Feet” (e.g.,

2 x 4 x 1 4 is 2 Inches x 4 Inches x 14 Feet).

You can also convert Cubic values (volume) to Board Feet.

Total Board Feet — With Dollar Cost

Find the total board feet for the following board sizes:

18'

2"

4"

2"

14'

10"

16'

2"

12"

If the boards cost $250 per MBM., what is the total cost? Use

Ç 0

(Cost) to figure total lumber cost.

KEYSTROKE

2. Recall total Board Feet and calculate total cost:

® ® x 2 5 0 Ç 0

(Cost)

DISPLAY

1. Enter board sizes, convert to board feet and store in memory: o o

2 x 4 x 1 4 Ç 8 µ

2 x 1 0 x 1 6 Ç 8 µ

2 x 1 2 x 1 8 Ç 8 µ

BDFT 9.333333

BDFT 26.66667

BDFT 36.

0.

M

M

M

BDFT 72.

$18.

00

Note: Unit cost is entered in the standard per thousand Board Foot measure (MBM) format.

Number of Board Feet Based on Entered Volume

Find the number of board feet required for a volume of 150 cubic feet.


Enter cubic feet and convert to board feet: o o

1 5 0 f f f

Ç 8

(Bd Ft)

150

0.

CU FEET

BDFT 1800.

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CIRCLE AND ARC CALCULATIONS

Circle/Arc values can be solved by entering any two of the following values: Arc Length/Angle, Diameter/Radius, Chord Length (Run), and Segment Rise (Rise).

It is recommended that you clear the calculator (press o twice) after calculating right-triangle solutions prior to beginning an Arc or

Circle solution.

Note: Circle/Arc solutions cannot be solved for the following cases:

• Entered Arc Length and Chord Length (Run)

• Entered Arc Length and Segment Rise (Rise)

Circumference and Area of a Circle

Find the area and circumference of a circle with a diameter of

11 Inches:

KEYSTROKE

o o

1 1 i C

C

C

DISPLAY

0.

DIA 11

INCH

AREA 95.03318

SQ INCH

CIRC 34-9/16

INCH

Arc Length —

Degree and Diameter Known

Find the arc length of an 85° portion of a circle with a 5-foot diameter:

KEYSTROKE

o o

5 f C

8 5 a a

DISPLAY

0.

DIA 5

FEET

0

INCH

ARC 85.00°

ARC 3

FEET

8-1/2

INCH

Arc Length — Chord Length and Segment Rise Known

Find the arc length and radius of a circle with a 3-feet 6-inch chord length and 1-foot 3-inch segment rise.


1. Enter the chord length of the segment as Run: o o

3 f 6 i R

0.

RUN 3

FEET

6

INCH

2. Enter the height of the segment as Rise:

1 f 3 i r

3. Find the Radius:

Ç a

(Radius)

RISE 1

FEET

3

INCH

RAD 1

FEET

10-3/16

INCH

(Cont’d)

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— 39

(Cont’d)

KEYSTROKE

4. Find the Arc Angle: a

5. Find the Arc Length: a

ARC 4

ARC 142.15°

FEET

DISPLAY

7-1/16

INCH

Arc Calculations —

Arc Length and Diameter Known

Find the arc degree, chord length, segment rise, segment and pie slice area, and segment rise, given a 5-foot diameter and an arc length of 3 Feet 3 Inches:


1. Enter Circle diameter (Note: enter diameter into the

C key): o o

5 f C

0.

DIA 5

FEET

0

INCH

2. Enter Arc length:

3 f 3 i a

ARC 3

FEET

3

INCH

3. Find degree of Arc: a

4. Find chord length: a

CORD 3

ARC 74.48°

FEET

0-5/16

INCH

5. Find segment area: a

6. Find pie slice area: a

7. Find segment rise: a

SEG 1.051381

PIE 4.0625

RISE 0

FEET

SQ FEET

SQ FEET

6-1/8

INCH

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ARCHED SEGMENT WALLS

The arc function can also calculate the outside (default) and inside lengths of arched walls. The outside arched wall lengths are measured outside of the arc (see diagram below). The inside arched wall lengths are measured inside of the arc (see diagram on page 43).

Arched Segment Walls —

Arched Windows (No Base)

Find the radius of an arched window with a chord length of 8 Feet 1

Inch and a rise of 2 Feet and 10-1/2 Inches. Then, find the arc angle, arc length and segment area of the window. Then find the

“outside” arched segment wall lengths in order to frame the window.

KEYSTROKE

1. Enter chord length: o o

8 f 1 i R

2. Enter rise:

2 f 1 0 i 1 / 2 r

3. Find Arc angle: a

4. Find Arc length: a

5. Display chord length: a



DISPLAY

0.

RUN 8

FEET

1

INCH

RISE 2

FEET

10-1/2

INCH

ARC 141.70°

ARC 10

FEET

7

INCH

CORD 8

FEET

1

INCH

SEG 16.96327

SQ INCH

PIE 22.63527

SQ INCH

(Cont’d)

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(Cont’d)

KEYSTROKE

8. Display entered rise (segment height): a

RISE 2

FEET

DISPLAY

10-1/2

INCH

9. Display On-center spacing: a

OC

STORED

16

INCH

10. Find the arched segment wall lengths: a a a

AW 1 0

FEET

AW 2 0

FEET

11-3/16

INCH

AW 3 2

FEET

2-9/16

9-1/8

INCH

INCH

Arched Segment Walls — Arched Windows (With Base)

Find the radius of an arched window with a chord length of 8 Feet

1 Inch, a rise of 2 Feet and 10-1/2 Inches and a base height of

2 Feet. Then, find the arc angle, arc length and segment area of the window. Then find the “outside” arched segment wall lengths in order to frame the window.

KEYSTROKE

1. Enter chord length: o o

8 f 1 i R

RUN 8

FEET

DISPLAY

1

0.

INCH

2. Enter rise:

2 f 1 0 i 1 / 2 r

RISE 2

3. Enter base height (into Rake Wall function):

2 f Ç r

FEET

BASE 2

10-1/2

FEET

0

INCH

INCH


ARC 141.70°

(Cont’d)

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(Cont’d)

KEYSTROKE


6. Display chord length: a



ARC 10

CORD 8

FEET

FEET

SEG 16.96327

PIE 22.63527

DISPLAY

7

1

INCH

INCH

SQ INCH

SQ INCH

9. Display entered rise (segment height): a

10. Display On-center spacing: a

RISE 2

FEET

OC

10-1/2

STORED

16

INCH

INCH

11. Find the arched segment wall lengths: a a a

AW 1 2

FEET

AW 2 2

FEET

11-3/16

INCH

AW 3 4

FEET

2-9/16

9-1/8

INCH

INCH

Arched Segment Walls — Chord Length and

Segment Height Known

You’re building a circular or arched segment wall. Given a chord length of

15 Feet and a segment height of 5 Feet, find all arc values and “inside” arched segment wall lengths. The On-center spacing is 16 Inches.


1. Change arched walls preference setting to “inside” Arc:

Ç ß ß ß ß ß ß

+ o

AW outSidE

AW inSidE

0.

(Cont’d)

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(Cont’d)


2. Enter chord length and segment height (rise): o o

1 5 f R

5 f r

RUN 15

FEET

0

INCH

RISE 5

FEET

0

0.

INCH


ARC 134.76º


5. Display entered chord length: a



ARC 19

FEET

CORD 15

1-5/16

FEET

SEG 54.19722

PIE 77.63472

0

INCH

INCH

SQ FEET

SQ FEET

8. Display entered segment height (rise): a

9. Display stored On-center spacing for the wall: a

RISE 5

FEET

0

INCH

OC

STORED

16

INCH

10. Find arched segment wall lengths: a a a a a

*

AW 1 4

FEET

10-11/16

INCH

AW 2 4

FEET

6-5/8

INCH

AW 3 3

FEET

11-3/8

INCH

AW 4 3

FEET

0-1/16

INCH

AW 5 1

FEET

6-1/4

INCH

11. Change arched walls preference setting back to “outside” Arc:

Ç ß ß ß ß ß ß

+ o

AW inSidE

AW outSidE

0.

*Successive presses of a will toggle to the beginning.

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COMPOUND MITER

Compound Miter Cuts

You’re installing crown moulding on the upper wall of your living room. If the wall corner angle is 60° and the spring (crown) angle is

38°, find the miter angle and bevel angle cut.


1. Store the spring angle: o o

3 8 ß Â

(Spring Angle)

SPRG

2. Enter wall corner angle and calculate miter angle:

6 0 Â

*

3. Calculate bevel angle:

Â

STORED

0.

38.00°

MITR 46.84°

BEVL 43.03°

4. Display stored spring angle:

Â

5. Display entered wall corner angle:

Â

SPRG

STORED

38.00°

CRNR 60.00°

*When a value less than 25 is entered as the wall corner angle, the compund miter function assumes this is the number of sides of a polygon, calculates the wall corner angle, and displays it first before displaying the miter angle.

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CONCRETE/PAVING

Volume of Concrete for a Driveway

Find the Cubic Yards of concrete required to pour a driveway with the following dimensions: 36 Feet 3 Inches long by 11 Feet 6 Inches wide by 4 Inches deep. If concrete costs $55 per Cubic Yard, what is the total cost?

KEYSTROKE

1. Multiply the length times the width to find the area: o o

3 6 f 3 i x 1 1 f 6 i

=

36

11

FEET

FEET

3

6

0.

INCH

INCH

416.875

SQ FEET

2. Multiply times the depth to find the volume: x 4 i =

5.146605

DISPLAY

CU YD

*

3. Multiply times the per Unit Cost to find the total cost of concrete: x 5 5 Ç 0

(Cost)

$283.

06

*This answer will automatically display in Cubic Yards due to the multiplication of mixed units, unless the preference setting for volume display has been changed from the default Standard Setting. (See Preference Settings on page 83.)

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Concrete Columns

Find the Cubic Yards of concrete required to pour five columns, if each has a diameter of 3 Feet 4-1/2 Inches and a height of 11 Feet

6 Inches. If the concrete weighs 1.75 Tons per Cubic Yard, what is the total weight in Tons? In Pounds? In Kilograms?

KEYSTROKE

1. Enter weight in Tons per Cubic Yard:

1 • 7 5 ß 0

(wt/vol)

STORED

1.75

T on P

DISPLAY er CU YD

2. Enter diameter and find Circle area: o o

3 f 4 i 1 / 2

C C

0.

3

FEET

4-1/2

INCH

AREA 8.946176

SQ FEET

3. Enter height and find total volume of concrete:

1 1 f 6 i h

Ç C

(Column/Cone)

Ç y x 5 =

HGHT 11

FEET

COL 102.881

6

INCH

CU FEET

3.810408

19.05204

CU YD

CU YD

4. Convert volume to weight in tons, pounds, and kilograms:

Ç 6

(tons)

Ç 4

(lbs)

Ç 1

(kg)

33.34107

66682.14

30246.51

T on

LB k

G



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Complex Concrete Volume

You’re going to pour an odd-shaped patio 4-1/2 Inches deep with the dimensions shown below. Calculate the total area (by dividing the drawing into three rectangles) and determine the total Yards of concrete required. Then, find the total cost, if concrete costs $45 per Cubic Yard.


1. Find area of Part “A” and store into Memory: o o

2 4 f 6 i –

7 f = x 2 7 f =

µ

24

17

FEET

FEET

472.5

6

6

M+ 472.5

SQ FEET

0.

INCH

INCH

SQ FEET

M

2. Find area of Part “B” and store into Memory:

7 f x 9 f =

µ

3. Find area of Part “C” and store into Memory:

9 f x 9 f =

µ

7

FEET

63.

SQ FEET

M+ 63.

SQ FEET

9

FEET

81.

SQ FEET

M+ 81.

SQ FEET

M

M

M

M

M

M

(Cont’d)

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(Cont’d)

KEYSTROKE

4. Find total area and clear Memory:

® ®

5. Find total Cubic Yards: x 4 i 1 / 2 =

6. Find total cost: x 4 5 Ç 0

(Cost)

M+ 616.5

DISPLAY

SQ FEET

8.5625

CU YD

$385.

31

Polygon, Finding Angles Based on Entered Radius and

Number of Sides

You’re going to pour a polygon-shaped patio. Find the polygon values if the radius is 15 Feet and the number of sides is 6.


1. Enter radius and number of sides* to calculate the full angle: o o

1 5 f Ç a

(Radius)

6 Ç R

(Polygon)

RAD 15

FEET

0

0.

INCH

FULL 120.00°

2. Then calculate the bi-sect angle, side length, perimeter, and polygon area:

R

R

R

R

HALF 60.00°

SIDE 15

PER 90

FEET

FEET

AREA 584.5671

0

0

INCH

INCH

SQ FEET

*You must enter more than three sides for a multi-sided polygon figure or the calculator will display “None”.

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Concrete Footings (


#4080)

Find the volume of concrete required for a 16-Inch by 8-Inch footing that measures 232 Feet 6 Inches in length. Then find the volume of five footings of the same size.

KEYSTROKE

1. Calculate and store footing area: o o

1 6 i x 8 i = ß 6

(Ftg Area)

F-AR

STORED

DISPLAY

0.

128.

SQ INCH

2. Enter length and find footing volume:

2 3 2 f 6 i Ç W

(Footing)

FTG 7.654321

CU YD

To find the volume of multiple footings of the same size, multiply times the total number of footings:

3. Multiply by 5 footings to find total concrete volume: x 5 =

38.2716

CU YD

4. Clear and return stored footing size to default:

Ç x

ALL CLEArEd

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Squaring-up a Foundation

A concrete foundation measures 45 Feet 6 Inches by 23 Feet

8 Inches. Find the diagonal measurement (square-up) to ensure the form is perfectly square.

KEYSTROKE

1. Enter sides as rise/run: o o

2 3 f 8 i r

4 5 f 6 i R

2. Find the square-up (diagonal): d

RISE 23

RUN 45

DIAG 51

FEET

FEET

FEET

DISPLAY

8

6

3-7/16

0.

INCH

INCH

INCH

Alternative Method using

l

and

W

keys (

NOT AVAILABLE ON

TRIG MODEL

#4080):

1. Enter sides as length and width: o o

2 3 f 8 i l

4 5 f 6 i W

2. Find the square-up (diagonal):

W W

LNTH 23

WDTH 45

SQUP 51

FEET

FEET

FEET

8

6

3-7/16

0.

INCH

INCH

INCH

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DRYWALL (


#4080)

Number of Drywall Sheets for a Given Area

Find the number of 4 x 8, 4 x 9 and 4 x 12 sheets to cover an area of 150 Square Feet.


1. Enter area: o o

1 5 0 f f

150

0.

SQ FEET

2. Find the number of 4 x 8 sheets, 4 x 9 sheets and 4 x 12 sheets required:

Ç h

(Drywall)

4

X

8 4.6875

(5 - 4 x 8 Sheets) h

4

X

9 4.166667

(5 - 4 x 9 Sheets) h

4

X

12 3.125

(4 - 4 x 12 Sheets) h

150.

SQ FEET

Number of Drywall Sheets for a Given Length

Find the number of 4 x 8, 4 x 9 and 4 x 12 sheets to cover a length of 40 Feet.


1. Enter length: o o

4 0 f

40

0.

FEET

2. Find the number of 4 x 8 sheets, 4 x 9 sheets and 4 x 12 sheets required:

Ç h

(Drywall) h h h

LNTH 40

4

4

4

X

X

X

8 10.*

9 10.*

12 10.*

FEET

0

INCH

* It is the same amount for all three of the sheet sizes because the linear calculation is based on the width of the sheets (e.g., 4 Feet).

Note: The order in which the different sheet size answers appear may differ from that of the guide. The order is based on the last displayed sheet size when previously calculated.

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GRADE/SLOPE

Back-Fill on a Slope — Percent of Grade Known

You’ve built 55 linear Feet of a 3-foot high retaining wall that is 3 Feet from the base of a 65% grade. You need to pour back-fill within

12 Inches of the top of the wall (for a 2 Foot depth). How many Cubic

Yards of fill should you have delivered?

KEYSTROKE

1. Find volume for “A”: o o

5 5 f x 3 f x 2 f = µ

2. Find run of “B”:

6 5 % p

2 f r

R

3. Find volume of triangle “B”:

5 5 f x ® R x 2 f =

÷ 2 = µ

4. Find total volume:

® ®

Ç y

DISPLAY

0.

55

FEET

3

FEET

M+ 330.

CU FEET

M

%GRD 65.

RISE 2

FEET

0

INCH

RUN 3

FEET

0-15/16

INCH

M

M

M

55

FEET

RUN 3

FEET

0-15/16

INCH

338.4615

CU FEET

M+ 169.2308

CU FEET

M

M

M

M

M+ 499.2308

CU FEET

18.49003

CU YD

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RIGHT TRIANGLE AND ROOF FRAMING EXAMPLES

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Roof Framing Definitions

Rise: The vertical distance measured from the wall’s top plate to the top of the ridge.

Span: The horizontal distance or full width between the outside edges of the wall’s top plates.

Run: The horizontal distance between the outside edge of the wall’s top plate and the center of the ridge; in most cases this is equivalent to half of the span.

Pitch: Pitch and slope are synonymous in modern trade language.

Pitch/slope of a roof is generally expressed in two types of measurement:

1) Ratio of unit rise to unit run* — 7/12 or 7 Inch

2) Angle of rafters, in degrees — 30.26°

*The unit rise is the number of Inches of rise per Foot (12 Inches) of unit run. The unit run is expressed as one Foot (12 Inches).

Plate: The top horizontal wall member that the ceiling joist and rafters sit on and fasten to.

Ridge: The uppermost point of two roof planes. This rafter is the uppermost rafter that all Hip, Valley, Valley Jack and Common rafters are fastened to.

Rafters: Rafters are inclined roof support members. Rafters include the following types:

• Common Rafter: The Common connects the plate to the ridge and is perpendicular to the ridge.

• Hip Rafter: The Hip rafter extends from the corner of two wall plates to the ridge or King rafter at angle other than 90°. The Hip rafter is an external angle of two planes.

• Valley Rafter: The Valley rafter extends from the corner of two wall plates to the ridge or King rafter at angle other than 90°.

The Valley rafter is an internal angle of two planes.

• Jack Rafters: Rafters that connect the Hip or Valley rafter to the wall plate.

• Irregular Hip/Valley Jacks: Jack rafters found in dual pitch or

“Irregular” roofs.

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Regular Roof: A standard roof where the Hips and/or Valleys run at

45° and have the same pitch/slope on both sides of the Hip and/or

Valley.

Irregular Roof: A non-standard roof where the Hips and/or Valleys bisect two different pitches/slopes, or have “skewed wings” or irregular Jacks.

Rake Wall: A gable end wall that follows the pitch/slope of a roof.

Plumb: Vertical Cut. The angle of cut from the edge of the board that allows the rafter to mate on the vertical side of the ridge rafter.

Level: Horizontal Cut. The angle of cut from the edge of the board that allows the rafter to seat flat on the wall plate.

Cheek: Side Cut(s). The angle to cut from the SIDE of the Jack rafter to match up against the Hip or Valley rafter, usually made by tilting the blade from 90°. Jack rafters typically have one Cheek cut.

If there is only one pitch (no irregular pitch), the angle will be 45°. If there are two pitches, each side will have a different Cheek cut for the Jack rafter and the angles will total 90°.

Incremental Adjustment: The difference in rafter length from one rafter to the next.

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Degree of Pitch

If the degree of pitch is 30.45°, what is the percent Grade, Slope and Pitch in Inches?


o o

3 0 • 4 5 p p p p

PTCH 7-1/16

0.

PTCH 30.45°

%GRD 58.78702

SLP 0.58787

INCH

Note: To convert Pitch in Inches: Simply enter the Pitch in Inches first (e.g.,

7 i p

), then continuously press the p key to calculate the pitch conversions, as above.

Percent Grade

If the Percent Grade is 47.25%, what is the Slope, Pitch in Inches, and Degree of Pitch?


o o

4 7 • 2 5 %

* p p p p

*For entering Percent Grade, you need to label the value with the percent key.

0.

%GRD 47.25

SLP 0.4725

PTCH 5-11/16

INCH

PTCH 25.29°

Pitch Ratio or Slope

If the Pitch Ratio is 0.65, what is the Pitch in Inches, Degree of Pitch, and Percent Grade?

KEYSTROKE

o o

• 6 5 Ç

* p

(Slope) p p p

*For entering Pitch Ratio, you must press the

Ç key first.

DISPLAY

0.

SLP 0.65

PTCH 7-13/16

INCH

PTCH 33.02°

%GRD 65.

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Common Rafter Length

If a roof has a 7/12 Pitch and a span of 14 Feet 4 Inches, what is the point-to-point length of the Common rafter (excluding the overhang or ridge adjustment)? What are the Plumb and Level cuts?

Note: Run is half the Span.


1. Find diagonal or point-to-point length of the Common rafter: o o

7 i p

1 4 f 4 i ÷ 2 =

R d

RUN 7

DIAG 8

PTCH 7

7

FEET

FEET

FEET

2

2

3-9/16

0.

INCH

INCH

INCH

INCH

2. Find Plumb and Level cuts: d d

PLMB 30.26°

LEVL 59.74°

Note: The Common rafter calculation is the "point-to-point" length and does not include the overhang or ridge adjustment.

Common Rafter Length —

Pitch Unknown

Find the common rafter length for a roof with a rise of 6 Feet

11-1/2 Inches and a run of 14 Feet 6 Inches. Solve for the Pitch in

Degrees and in Inches.

KEYSTROKE

Find Diagonal and Pitch: o o

6 f 1 1 i 1 / 2 r

1 4 f 6 i R d p p

RISE 6

FEET

RUN 14

DIAG 16

DISPLAY

11-1/2

FEET

FEET

6

1

PTCH 5-3/4

0.

INCH

INCH

INCH

INCH

PTCH 25.64°

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Angle and Diagonal (Hypotenuse)

Find the Diagonal (Hypotenuse) and degree of angle of a right triangle that is 9 Feet high and 12 Feet long.


1. Enter Rise and Run: o o

9 f r

1 2 f R

RISE 9

RUN 12

FEET

FEET

0

0

0.

INCH

INCH

2. Solve for Diagonal/Hypotenuse and Pitch in Inches and Degree of

Angle: d p p

DIAG 15

FEET

0

PTCH 9

INCH

INCH

PTCH 36.87°

Rise

Find the Rise given a 7/12 Pitch and a Run of 11 Feet 6 Inches.

KEYSTROKE

o o

7 i p

1 1 f 6 i R r

DISPLAY

0.

PTCH 7

INCH

RUN 11

FEET

6

INCH

RISE 6

FEET

8-1/2

INCH

Rise and Diagonal

Find the Rise and Diagonal of a right triangle given a 30° Pitch and a run of 20 Feet 4 Inches.

KEYSTROKE

o o

3 0 p

2 0 f 4 i R r d

DISPLAY

0.

PTCH 30.00°

RUN 20

FEET

4

INCH

RISE 11

FEET

8-7/8

INCH

DIAG 23

FEET

5-3/4

INCH

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Sheathing Cut

You have framed an equal pitch roof and need to apply the roof sheathing. Find the distance from the corner of the sheathing so that you can finish the run at the Hip rafter and cut the material. The pitch is 6 Inches and you are using 4-foot by 8-foot plywood, with the 8-foot side along the plate.


1. Enter Pitch: o o

6 i p

2. Enter width of plywood:

4 f d

3. Find length of sheathing:

R

RUN 3

FEET

PTCH 6

DIAG 4

FEET

0

6-15/16

0.

INCH

INCH

INCH

Regular Hip/Valley and Jack Rafters

You’re working with a 7/12 Pitch, and half your total span is 8 Feet

5 Inches:

(1) Find point-to-point length and cut angles for the common rafter;

(2) Find the length and cut angles of the adjoining Hip (or Valley) and;

(3) Find the Incremental Jack Adjustment, Regular Jack Rafter lengths and cut angles (Jack Rafters at 16-Inch On-center spacing).


1. Find Common rafter length and Plumb and Level cuts: o o

8 f 5 i R

7 i p d d d

RUN 8

DIAG 9

FEET

FEET

5

PTCH 7

8-15/16

0.

INCH

INCH

INCH

PLMB 30.26°

LEVL 59.74°

2. Find Hip/Valley rafter length and cut angles:

H

H

H

H

H/V 12

FEET

10-1/2

INCH

PLMB 22.42°

LEVL 67.58°

CHK1 45.00°

(Cont’d)

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(Cont’d)


3. Find regular incremental Jack adjustment and regular Jack rafter lengths and cut angles: j j j j j j j j j j j j

JKOC

JK 1 8

JK 2 6

JK 3 5

JK 4 3

JK 5 2

JK 6 0

STORED

FEET

FEET

FEET

FEET

FEET

FEET

JK 7 0

16

INCH

*

INCR 1

FEET

6-1/2

INCH

2-3/8

7-7/8

1-3/8

6-13/16

0-5/16

5-13/16

FEET

0

INCH

INCH

INCH

INCH

INCH

INCH

INCH

PLMB 30.26°

LEVL 59.74°

CHK1 45.00°

*If display does not read JKOC 16 INCH (the default), then reset On-center spacing by pressing

1 6 i ß 5

.

Jack Rafters — Using Other Than 16-Inch On-Center Spacing

A roof has a 9/12 Pitch and a run of 6 Feet 9 Inches. Find the incremental jack adjustment, jack rafter lengths and cut angles at 18-inch

(versus 16-inch) On-center spacing. The On-center spacing is used for both Regular and Irregular Jack calculations.

KEYSTROKE

1. Enter Pitch, Run and spacing: o o

9 i p

6 f 9 i R

1 8 i ß 5

(o.c.)

OC

DISPLAY

PTCH 9

RUN 6

FEET

STORED

9

18

0.

INCH

INCH

INCH

2. Find regular incremental Jack adjustment and regular Jack rafter lengths and cut angles: j j j j j j j j j j

JKOC

JK 1 6

JK 2 4

JK 3 2

JK 4 0

STORED

FEET

FEET

FEET

FEET

JK 5 0

FEET

18

INCH

INCR 1

FEET

10-1/2

INCH

6-3/4

8-1/4

9-3/4

11-1/4

0

INCH

INCH

INCH

INCH

INCH

PLMB 36.87°

LEVL 53.13°

CHK1 45.00°

3. Reset On-center spacing to default 16-inch:

1 6 i ß 5

(o.c.)

OC

STORED

16

INCH

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Irregular Hip/Valley and Jack Rafters — Descending, with

On-Center Spacing Maintained

You’re working with a 7/12 Pitch and half your overall span is 4 Feet.

The irregular Pitch is 8/12, and 16-inch On-center spacing is maintained on both sides. Complete the following steps:

(1) Find the length of the common rafter;

(2) Reset calculator to 16-inch On-center spacing;

(3) Enter the Irregular Pitch; find the length of the adjoining

“Irregular” Hip (or Valley) and the cut angles;

(4) Find the incremental jack adjustment and the jack lengths on the “Irregular” Pitch side (16-inch On-center spacing);

(5) Find the cut angles;

(6) Find the incremental jack adjustment and the jack lengths on the “Regular” Pitch side (16-inch On-center spacing);

(7) Find the cut angles.

KEYSTROKE

1. Find Common rafter length: o o

7 i p

4 f R d

2. Enter On-center spacing:

1 6 i ß 5

(o.c.)

DIAG 4

OC

STORED

DISPLAY

PTCH 7

RUN 4

FEET

FEET

0

7-9/16

16

0.

INCH

INCH

INCH

INCH

3. Find Irregular Hip/Valley rafter length and cut angles:

8 i Ç H

(Ir/Pitch)

H

H

H

H

H

IH/V 5

FEET

IPCH 8

9-11/16

INCH

INCH

PLMB 23.70°

LEVL 66.30°

CHK1 41.19°

CHK2 48.81°

(Cont’d)

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(Cont’d)


4. Find irregular incremental jack adjustment and Irregular Jack lengths:

Ç j

(Ir/Jack) j j

* j j

IJOC

INCR 1

FEET

4-13/16

INCH

IJ 1 2

IJ 2 1

STORED

FEET

FEET

IJ 3 0

FEET

16

INCH

9-5/8

4-13/16

0

INCH

INCH

INCH

*It is not necessary to continue pressing

Ç when displaying each Jack rafter size.

5. Find Irregular Jack plumb, level and cheek cut angles: j j j

PLMB 33.69°

LEVL 56.31°

CHK1 41.19°

6. Find regular incremental jack adjustment and Regular Jack lengths: j j j j j

JKOC

INCR 1

FEET

9-3/16

INCH

JK 1 2

STORED

FEET

JK 2 1

FEET

JK 3 0

FEET

16

INCH

10-3/8

1-1/4

0

INCH

INCH

INCH

7. Find Regular Jack plumb, level and cheek cut angles: j j j

PLMB 30.26°

LEVL 59.74°

CHK1 48.81°

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Irregular Hip/Valley and Jack Rafters — Ascending, with Jacks

Mating at Hip/Valley

You’re working with a 7/12 Pitch and half your overall span is 4 Feet.

The Irregular Pitch is 8/12, and the Jacks need to mate at the Hip.

The maximum allowable On-center spacing is 16 Inches. Find the

Jack rafter sizes from smallest to largest (ascending order).

Complete the following steps:

(1) Set Preference display to “JK ASCEND” (Jack sizes in ascending order);

(2) Set Preference display to “IRJK JAC-JAC” (Jacks mate);

(3) Find the length of the common rafter;

(4) Find the length of the adjoining “Irregular” Hip (or Valley) and the cut angles;

(5) Find the o.c., incremental jack adjustment, Jack lengths and cut angles on the “Irregular” pitched side;

(6) Find the o.c., incremental jack adjustment, Jack lengths and cut angles on the “Regular” pitched side.

Note: After completing this example, you may need to reset the Preferences back to

“IRJK OC-OC” if you do not normally figure jacks in this manner. (See Preference

Settings on page 83.)


1. Review Preferences until you find “Jack Descend”: o o

Ç ß

(Prefs)

(If not at 1/16, press

+ until 1/16 is displayed)

ß

ß

ß

ß

ß

ß

Set Preference to “Ascend”:

FRAC 0-1/16

HDRM 6

AREA Std.

VOL Std.

FEET

8

0.

INCH

INCH

RAKE dESCEnd

AW outSidE

JACK dESCEnd

+

(plus sign)

JACK ASCEnd

2. Set Preference to “Jacks Mate”:

ß

+

(plus sign)

3. Find common rafter length:

7 i p

4 f R d

DIAG 4

IRJK OC-OC

IRJK JAC-JAC

PTCH 7

RUN 4

FEET

FEET

0

7-9/16

INCH

INCH

INCH

(Cont’d)

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(Cont’d)


4. Enter Irregular Pitch and find Irregular Hip/Valley rafter length and cut angles:

8 i Ç H

(Ir/Pitch)

H

H

H

H

H

IH/V 5

FEET

IPCH 8

9-11/16

INCH

INCH

PLMB 23.70°

LEVL 66.30°

CHK1 41.19°

CHK2 48.81°

5. Display the o.c. and find the irregular incremental jack adjustment and Irregular Jack lengths and cut angles:

Ç j

(Ir/Jack) j j j j j j j

IJOC

INCR 1

IJ 1 1

STORED

FEET

FEET

IJ 2 2

IJ 3 4

16

4-13/16

4-13/16

FEET

FEET

INCH

9-5/8

2-1/2

*

INCH

INCH

INCH

INCH

PLMB 33.69°

LEVL 56.31°

CHK1 41.19°

6. Find the o.c., regular incremental jack adjustment and Regular

Jack lengths and cut angles: j j j j j j j j

JKOC 14

INCR 1

JK 1 1

JK 2 3

JK 3 4

FEET

FEET

FEET

FEET

1-1/16

7-9/16

INCH

6-1/2

6-1/2

*

INCH

INCH

INCH

INCH

PLMB 30.26°

LEVL 59.74°

CHK1 48.81°

7. Reset jack rafter Preference Settings: o o

Ç ß ß ß ß ß ß ß

Set Preference to “Descend”:

+

(plus sign)

0.

JACK ASCEnd

JACK dESCEnd

Set Preference to “Jacks On-Center”:

ß

+

Exit Preference Settings: o

IRJK JAC-JAC

IRJK OC-OC

0.

*The stored On-center spacing is used as the maximum allowable spacing. Therefore, it is assigned to the side with the largest entered pitch. In this example, the “Irregular” side pitch is larger than the “Regular” side pitch; thus, the Irregular side is calculated using the maximum On-center value (16 Inches). If the Regular pitch side had the larger pitch, it would require the larger (16 Inches) On-center.

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Rake-Wall – No Base

Find each stud size in a Rake-Wall with a peak (rise) of 4 Feet, and a length (run) of 8 Feet. Use 16 Inches as your spacing.

Note: The wall has no base.


1. Enter Rise and Run and display o.c. spacing: o o

4 f r

8 f R

® 5

*

*If 16-inch is not displayed, enter

1 6 i ß 5

.

0.

RISE 4

FEET

0

INCH

RUN 8

FEET

0

INCH

OC

STORED

16

INCH

2. Find stud lengths:

Ç r

(R/Wall) r r r r r r

RWOC

STORED

16

INCH

RW 1 3

FEET

4

INCH

RW 2 2

FEET

8

INCH

RW 3 2

FEET

0

INCH

RW 4 1

FEET

4

INCH

RW 5 0

FEET

8

INCH

BASE 0

FEET

0

INCH

3. Find Rake-Wall angle of incline: r

RW 26.57°

Note: By setting the Rake “Ascend” Preference (see Preference Settings on page

83), you may view Rake-Wall stud lengths from smallest to largest size.

Note: You can also solve if you only know the Rise and Pitch, Run and Pitch, or

Diagonal and Pitch. Simply enter the known values via p

, r

,

R

, or d keys, similar to Step #1 above, then solve for Rake-Wall stud lengths, as seen in Step #2.

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Rake-Wall – With Base

Find each stud size in a rake-wall with a peak (rise) of 4 Feet, a length (run) of 8 Feet, and a base of 5 Feet. Use 16 Inches as your

On-center spacing.

KEYSTROKE

1. Enter Rise, Run, and o.c. spacing: o o

4 f r

8 f R

® 5

*

*If 16-inch is not displayed, enter

1 6 i ß 5

.

RISE 4

RUN 8

OC

FEET

FEET

STORED

DISPLAY

0

0

16

0.

INCH

INCH

INCH

2. Enter base, then find stud lengths and angle of incline:

5 f Ç r

(R/Wall) r r r r r r r r

BASE 5

RWOC

STORED

RW 1 8

RW 2 7

RW 3 7

RW 4 6

RW 5 5

BASE 5

FEET

FEET

FEET

FEET

FEET

FEET

FEET

0

16

4

8

0

4

8

0

INCH

INCH

INCH

INCH

INCH

INCH

INCH

INCH

RW 26.57°

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ROOFING MATERIALS

The Roof function solves for the amount of bundles and squares for standard gable-end style roofs. Bundles are based on a coverage area of 33.33 Square Feet, and squares are based on 100 Square Feet.

Roof Covering —

Entering Pitch, Length and Width

Find the roof area and number of roofing squares, number of bundles and 4 x 8 sheets required for a 10-inch Pitch roof covering a floor area of 14 Feet by 11 Feet. Also calculate the plan area.

KEYSTROKE

1. Enter Pitch and floor area*: o o

1 0 i p

1 4 f l

1 1 f W

2. Find roof area:

Ç d

(Roof)

3. Find number of roofing squares: d

4. Find number of bundles: d

5. Display bundle size/area: d

6. Find number of 4 x 8 sheets: d

DISPLAY

PTCH 10

LNTH 14

WDTH 11

FEET

FEET

ROOF 200.4631

0

0

0.

INCH

INCH

INCH

SQ FEET

SQRS 2.00

BNDL 6.01

B-SZ 33.33

SQ FEET

4X8 6.26

7. Display stored Pitch: d

PTCH

STORED

10

INCH

8. Find floor/plan area: d

PLAN 154.

SQ FEET

*If you know the area (and do not need to calculate it), once you have entered the

Pitch, enter the area and label it as Square Feet, then press

Ç d

. For example, if the plan/floor area is 100 Square Feet, enter

1 0 0 f f Ç d

.


As this model does not have l and

W keys, you must calculate area the standard way (e.g., L x W, or entering 154 Square Feet), then press

Ç d

.

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Roof Covering — Entering Rise, Run (No Pitch) and Area

Find the roof covering, Pitch and plan area if the Rise is 10 feet and

Run is 15 Feet. The length of the floor area is 50 Feet and the width is

30 Feet.


1. Enter Rise, Run, length and width: o o

1 0 f r

1 5 f R

5 0 f l

3 0 f W

RISE 10

RUN 15

LNTH 50

WDTH 30

FEET

FEET

FEET

FEET

0

0

0

0

0.

INCH

INCH

INCH

INCH

2. Find roof area, number of roofing squares, number of bundles, stored bundle size, number of 4 x 8 sheets, Pitch and plan area:

Ç d

(Roof) d d d d d d

ROOF 1082.776

PTCH

SQRS 18.03

BNDL 54.08

B-SZ 33.33

4X8 56.34

STORED

PLAN 1500.

SQ FEET

SQ FEET

8

INCH

SQ FEET


As this model does not have l and

W keys, you must calculate area the standard way (e.g., L x W, or entering 200 Square Feet), then press

Ç d

.

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STAIR LAYOUT EXAMPLES

Stair Layout Definitions

Rise: The “floor-to-floor” or “landing-to-landing” rise is the actual vertical rise required for building a stairway after the finish flooring has been installed.

Run: The run of a stairway is the amount of horizontal space required. The total run of a stairway is equal to the width of each tread multiplied by the number of treads.

Desired Riser Height: The desired riser height is the amount of vertical rise you allow for each individual riser in the stairway. This is sometimes dictated by local code.

Actual Riser Height: The actual height of each riser is measured from the top of one tread to the top of the next tread.

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Number of Risers: The number of risers includes both the first and the last riser of the stairway.

Riser Overage or Underage: The riser overage or underage is the difference between the “floor-to-floor” rise and the total height of all of the risers. Many times the riser height does not divide evenly into the floor-to-floor rise and a small fraction of an inch is left over. A positive remainder is an overage, while a negative remainder is an underage.

Tread Width: The width of each tread is measured from the front of one riser to the front of the next riser. The width of each tread does

NOT include the nosing or overhang of the tread. The nosing or overhang of a tread is the rounded front of the tread that projects beyond the face of the riser.

Number of Treads: The number of treads is one less than the number of risers.

Tread Overage or Underage: The tread overage or underage is the difference between the run or horizontal space that a stairway must fit into and the total width of the treads. Similar to the riser overage/underage, many times the total width of the treads does not divide evenly into the run or horizontal space for the stairway and a small fraction of an inch is left over. A positive remainder is an overage, a negative remainder is an underage.

Stringers: Also called carriages, stair horses or stair jacks. Stringers are the diagonal members that support the treads and risers.

Angle of Incline: The angle of incline of the stairway is determined by the rise and run of each stair. The angle of incline should not be confused with the pitch of the stairway. The pitch of a stairway is the angle based on the floor-to-floor rise and the horizontal run of the stairway. The angle of incline is based on the “actual” riser height and the “actual” tread width of the stair.

Stairwell Opening: The length of the opening at the top of the stairs. The computation is based on the headroom height (the desired spacing between the stairs and upper floor ceiling) and thickness of the upper floor where the opening is located.

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— 71

Stairs — Given Only Floor-to-Floor Rise

You’re building a stairway with a total rise of 9 Feet 11 Inches. Your desired riser height is 7-1/2 Inches and desired tread width is

10 Inches. The desired headroom is 6 Feet 8 Inches and floor thickness 10 Inches*. Find all stair values, then calculate the run.

*Headroom and floor thickness are required to calculate the length of the stairwell opening.

KEYSTROKE

1. Enter known Rise: o o

9 f 1 1 i r

2. Recall stored desired stair riser height:

® 7

RISE 9

R-HT

STORED

FEET

DISPLAY

11

7-1/2

0.

INCH

INCH

3. Recall stored desired stair tread width:

® 9

4. Recall stored desired floor thickness:

® 8

T-WD

FLOR

STORED

STORED

10

10

INCH

INCH

5. Display stored Headroom (via Preference Setting Mode):

Ç ß ß ß ß

HDRM 6

FEET

8

INCH

6. Find riser height, number of risers, riser underage/overage, tread width, number of treads, tread overage/underage, length of stairwell opening, stringer length and angle of incline. As a final step, calculate the run.

s s s s s s s s s s s

*

STRG 15

RISE

R-HT 7-7/16

T-WD

OPEN 10

FEET

STORED

9

INCH

RSRS 16.

R+/– 0

STORED

INCH

10

INCH

TRDS 15.

T+/– 0

FEET

1

6-15/16

INCH

INCH

INCH

INCL 36.64°

RUN 12

FEET

FEET

6

11

INCH

INCH

*Continuous presses of s will also recall stored desired riser height, tread, headroom and floor thickness values.

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Notes on Changing Stored Stair Variables:

To Change Desired Riser Height: If you wish to use a Desired

Riser Height of other than 7-1/2 Inches (the calculator’s default), simply enter a new value. For example, to enter 8 Inches, enter

8 i ß 7

. Press

® 7 to review your new entry. This value will be permanently stored until you change it.

To Change Desired Tread Width: If you wish to use a Desired

Tread Width of other than 10 Inches (the calculator’s default), simply enter a new value. For example, to enter 10-1/2 Inches, enter

1 0 i 1 / 2 ß 9

. Press

® 9 to review your new entry.

This value will be permanently stored until you change it.

To Change Desired Floor Thickness: If you wish to use a Desired

Floor Thickness of other than 10 Inches (the calculator’s default), simply enter a new value. For example, to enter 12 Inches, enter

1 2 i ß 8

. Press

® 8 to review your new entry. This value will be permanently stored until you change it.

To Change Desired Headroom: If you wish to use a Desired

Headroom other than 6 Feet 8 Inches (the calculator’s default), simply select a new value via the Preference Mode and use the

+ or

– keys to increase/decrease by one inch. See examples below.

This value will be permanently stored until you change it.

KEYSTROKE

1. Select Headroom via Preference Mode: o o

Ç ß ß ß ß

HDRM 6

FEET

DISPLAY

8

0.

INCH

2. Decrease Headroom Height by 2 Inches:

– –

HDRM 6

FEET

6

INCH

3. Then increase Headroom Height by 4 Inches:

+ + + +

HDRM 6

FEET

10

INCH

4. Return Headroom Height to default of 6 Feet 8 Inches:

– –

HDRM 6

FEET

8

INCH

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Stairs — Given Only the Run

You’re building a stairway with a total run of 20 Feet. Your desired riser height is 7-1/2 Inches and desired tread width is 10 Inches. The desired headroom is 6 Feet 8 Inches and floor thickness 10 Inches.

Find all stair values, then calculate the rise.

KEYSTROKE

1. Enter run: o o

2 0 f R

RUN 20

FEET

DISPLAY

0

0.

INCH

2. Find riser height, number of risers, riser underage/overage, tread width, number of treads, tread overage/underage, stairwell opening, stringer length and angle of incline. As a final step, calculate the rise.

s s s s s s s s s s s

R-HT

RUN

STORED

OPEN 10

STRG 25

STORED

RISE 15

7-1/2

INCH

RSRS 25.

R+/– 0

T-WD 10

INCH

INCH

TRDS 24.

T+/– 0

FEET

FEET

0

0

INCH

INCH

INCH

INCL 36.87°

20

FEET

FEET

0

7-1/2

INCH

INCH

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Stairs — Given Rise and Run

You need to build a stairway with a floor-to-floor height of 10 Feet

1 Inch, a run of 15 Feet 5 Inches, and a nominal desired riser height of 7-1/2 Inches (default). Calculate all stair values.



1 0 f 1 i r

1 5 f 5 i R

RISE 10

RUN 15

FEET

FEET

1

5

0.

INCH

INCH

2. Find Stair values: s s s s s s s s s s s s s s s

RUN

RISE

HDRM

R-HT 7-9/16

INCH

*

RSRS 16.

R+/– 0

INCH

T-WD 12-5/16

INCH

TRDS 15.

T+/– – 0-5/16

INCH

OPEN 12

FEET

2-1/2

INCH

STRG 18

FEET

0-3/4

INCH

STORED

STORED

R-HT

T-WD

STORED

FLOR

INCL 31.56°

15

FEET

STORED

*A in the display means that the calculated riser height exceeds the stored desired riser height.

5

INCH

10

FEET

1

INCH

STORED

7-1/2

INCH

10

INCH

6

FEET

8

INCH

STORED

10

INCH

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— 75

Stairs — Given Rise and Run, Using “Riser Limited” Function for Code Restrictions

Your local code prohibits risers greater than 7-1/2 Inches. You need to build a stairway with a floor-to-floor height of 10 Feet 1 Inch, a run of 15 Feet 5 Inches. Calculate all stair values. Use the “Riser

Limited” function (second function of the s key) to calculate a riser height that does not exceed the stored Desired Riser Height of

7-1/2 Inches.

KEYSTROKE


1 0 f 1 i r

1 5 f 5 i R

RISE 10

RUN 15

FEET

FEET

DISPLAY

1

5

0.

INCH

INCH

2. Find stair values using “Riser Limited”: s s s s s s s

Ç s

(Riser Limited) s s s s s s s

OPEN 12

STRG 18

RUN

RISE

STORED

STORED

R-HT

HDRM

R-HT 7-1/8

STORED

STORED

STORED

STORED

INCH

RSRS 17.

R+/– 1/8

T-WD 11-9/16

T-WD

FLOR

FEET

FEET

15

10

6

INCH

INCH

TRDS 16.

T+/– 0

2-1/16

1-5/16

INCH

INCH

INCH

INCL 31.64°

FEET

FEET

5

1

7-1/2

FEET

10

8

10

INCH

INCH

INCH

INCH

INCH

INCH

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Baluster Spacing

You are going to install a handrail at the top of a balcony. Your total span is 156 Inches and you would like the space between the balusters to be about 4 Inches. If each baluster is 1-1/2 Inches wide, what is the exact spacing between each baluster?


1. Estimate number of balusters in span.

o o

1 5 6 i ÷

5 i 1 / 2 =

*

156

0.

INCH

28.36364

(28 balusters)

*Desired spacing plus baluster width (4” plus 1-1/2”).

2. Find total space ‘occupied’ by the balusters by multiplying the width of each baluster by the rounded number of balusters (found above):

1 i 1 / 2 x

2 8 =

1-1/2

42

INCH

INCH

3. Find total space between all balusters:

1 5 6 i –

4 2 i =

156

114

INCH

INCH

4. Find actual baluster spacing by dividing total space between all balusters by the number of spaces between the balusters (number of balusters plus one equals 29):

1 1 4 i ÷

2 9 =

114

3-15/16

INCH

INCH

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— 77

STUDS

Find the number of 16-inch On-center studs needed for a wall with a length of 18 Feet 7-1/2 Inches.


1. Enter length and convert to Studs*.

o o

1 8 f 7 i 1 / 2

Ç 5

(Studs)

0.

18

FEET

7-1/2

INCH

STUD 15.

(studs)

*The length is divided by the On-center spacing; in this case, 16 Inches (default setting). Press

® 5 to review the stored On-center value. If you need to enter a new

On-center, for example 18 Inches, enter

1 8 i ß 5

.

BASIC D:M:S AND TRIGONOMETRY EXAMPLES

Converting Degrees:Minutes:Seconds

Convert 23° 42’ 39” to decimal degrees:

KEYSTROKE

o o

2 3 • 4 2 • 3 9

Ç •

(dms deg)

DISPLAY

0.

DMS 23.42.39

23.71°

Convert 44.29° to degrees:minutes:seconds format:


o o

4 4 • 2 9 Ç •

(dms deg)

Note: Improperly formatted entries will be redisplayed in the correct convention after any operator key is pressed. For example, 30° 89’ entered will be corrected and displayed at 31° 29’ 0” or 31.48333°.

0.

DMS 44.17.24

Time Calculations Using D:M:S

Add 7 Hours 45 Minutes 33 Seconds to 11 Hours 16 Minutes

20 Seconds:

KEYSTROKE

o o

7 • 4 5 • 3 3

+ 1 1 • 1 6 • 2 0 =

DISPLAY

0.

DMS 7.45.33

DMS 19.01.53

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TRIGONOMETRIC FUNCTIONS

Trigonometric functions are available on the Construction Master

Pro Trig and Construction Master Pro Desktop calculators.

The drawing and formulas below list basic trigonometric formulas, for your reference:

Given side A and angle a, find:

Side C A

÷ a

ç =

(e.g.,

3 f ÷ 5 3 • 1 3 ç =

)

Side B

Angle b

A x a t =

90°

– a

=

Given side A and angle b, find:

Side B

Side C

Angle a

A

÷ b t =

A

÷ b

S =

90°

– b

=

Given side B and angle a, find:

Side A

Side C

B

÷ a t =

B

÷ a

S =

Given side C and angle a, find:

Side A

Side B

C x a

ç =

C x a

S =

Given side A and side C, find:

Angle a

Angle b

A

÷

C

= Ç ç

A

÷

C

= Ç S

Given side B and angle b, find:

Side C

Side A

B

÷ b

ç =

B x b t =

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Converting Percent Grade to D:M:S

You are grading a piece of property and the site plans call for an embankment with a grade “no steeper than 35%.” Your level shows the slope at an 18° 15’ angle. Will this pass?


Enter grade and convert to degrees:minutes:seconds: o o

3 5 % Ç t Ç •

(dms deg)

0.

DMS 19.17.24

Since your level reading of 18° 15’ is less steep than 19° 17’ 24”, the slope will pass inspection.

Converting Tangent/Pitch to Angle

Find the angle and corresponding tangent for a roof with an 8/12 Pitch.

KEYSTROKE

1. Enter pitch: o o

8 i p

2. Convert Pitch to degrees: p

3. Find Tangent or Slope: t

DISPLAY

PTCH 8

0.

INCH

PTCH 33.69°

0.666667

Converting Roof Angle in Degrees to Pitch in Inches

Convert a roof angle of 30.25° to Pitch in Inches.

KEYSTROKE

1. Enter angle: o o

3 0 • 2 5 t

2. Convert to Pitch:

Ç p

(Slope) p

DISPLAY

0.

0.583183

SLP 0.583183

PTCH 7

INCH

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Angle — Rise and Hypotenuse Known

Find the angle that connects the rise and hypotenuse of a right triangle, if the rise is 6 Feet and the hypotenuse is 10 Feet in length.


1. Use trigonometric formula (divide the rise by the hypotenuse): o o

6 f ÷ 1 0 f =

0.

0.6

2. Solve for degrees:minutes:seconds or angle:

Ç ç

(cos

-1

)

Ç •

(dms deg)

53.13°

DMS 53.07.48

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— 81

APPENDIX A — DEFAULT SETTINGS

After a

Clear All (

Ç x

), your calculator will return to the following settings:

STORED VALUES

Desired Riser Height

Desired Tread Width

Floor Height

On-center Spacing

Weight per Volume

Block Area

(except Trig model)

Block Length

(except Trig model)

Footing Area

(except Trig model)

Spring (Crown) Angle

DEFAULT VALUE

7-1/2

INCH

10

INCH

10

INCH

16

INCH

1.5

T on P er CU YD

128.

SQ INCH

16

INCH

264.

SQ INCH

45.00°

If you replace your batteries or perform a Full Reset* (press

O

, hold down x

, and press o

), your calculator will return to the following settings (in addition to those listed above):

PREFERENCE SETTINGS

Fractional Resolution

Area Display

Volume Display

Stairway Headroom

Rake Wall

Arched Wall

Jack Rafters

Irregular Jack Spacing

Exponent

Meter Linear Display

Decimal Degree Display

Fractional Mode

DEFAULT VALUE

1/16

Standard

Standard

6 Feet 8 Inch

Descending

Outside

Descending

OC-OC

Off

0.000

0.00°

Standard

*Depressing the Reset button located above the p key (below the

Ç key on the

Desktop model) will also perform a Full Reset.

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APPENDIX B — PREFERENCE SETTINGS

The Construction Master Pro calculators have Preference Settings that allow you to customize or set desired dimensional formats and calculations. The options vary per model.

If you replace your batteries or perform a Full Reset* (press

O

, hold down x

, and press o

), your calculator will return to the following settings (in addition to those listed on the previous page):

*Depressing the Reset button located above the p key (below the

Ç key on the

Desktop model) will also perform a Full Reset.

PREFERENCE

1) Fractional Resolution

OPTIONS

– *1/16 (displays fractional values to the nearest 16th of an Inch)

– 1/32

– 1/64

– 1/2

– 1/4

– 1/8

2) Area Display Format – *Standard (if units entered are the same—e.g., Feet x Feet—the answer will remain in this format (Square Feet), but if units entered are different — e.g.,

Inches x Feet—area answer will be displayed in Square Feet)

– Square Feet (area answers always displayed in Square Feet, regardless of unit entry — e.g., Inches x Inches =

Square Feet)

– Square Yards (area answers always displayed in Square Yards — e.g.,

Feet x Feet = Square Yards)

– Square Meters (area answers always displayed in Square Meters — e.g.,

Feet x Feet = Square Meters)

Note: To check the current Fractional Resolution, press

® /

. Either “Std” (standard fractional resolution) or “Cnst” (constant) will be displayed, along with the fractional resolution).

(Cont’d)

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— 83

(Cont’d)

PREFERENCE OPTIONS

3) Volume Display Format – *Standard (if units entered are the same — e.g., Feet x Feet x Feet — the answer will remain in this format (cu. ft), but if units entered are different — e.g.,

Feet x Feet x Inches — vol. answer will always be displayed in Cubic Yards)

– Cubic Yards (vol. answers always displayed in Cubic Yards, regardless of unit entry — e.g., Feet x Feet x Feet =

Cubic Yards)

– Cubic Feet (vol. answers always displayed in Cubic Feet, regardless of unit entry — e.g., Inches x Inches x Inches =

Cubic Feet)

– Cubic Meters (vol. answers always displayed in Cubic Meters, regardless of unit entry — e.g., Feet x Feet x Feet =

Cubic Meters)

4) Stairwell—Headroom – *6 Feet 8 Inch (default)

Height – Use

+ or

– key to increase or decrease above value by 1 Inch

5) Rake-Wall Descending – *Descending (Rake-Wall studs are or Ascending displayed from largest to smallest size)

– Ascending (Rake-Wall studs are displayed from smallest to largest size)

6) Arched Wall Outside or Inside

– *Outside (Arched walls are calculated for outside of the arc)

– Inside (Arched walls are calculated for inside of the arc)

7) Jack Rafters Descending – *Descending (Jack rafters are or Ascending displayed from largest to smallest size)

– Ascending (Jack rafters are displayed from smallest to largest size)

(Cont’d)

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(Cont’d)

PREFERENCE OPTIONS

8) Irregular Jack Rafters – *OC-OC (On-center spacing maintained

O-C or Mate on both regular and irregular sides)

– JAC-JAC (regular/irregular Jack rafters

“mate” at the hip/valley, e.g., On-center spacing not maintained on both sides)

9) Exponent Off or On – *Off (Exponential Mode is Off; turns on Auto-ranging; e.g., if display can’t show seven digits, will display in next largest unit).

– On (Exponential Mode is On)

10) Meter Linear Display – *0.000 (linear Meter answers are always displayed to third decimal place)

– FLOAt (linear Meter answers are displayed to the maximum number of decimal places — e.g., 1.234 M + 2.56 M

= 3.794 M)

11) Decimal Degree

Display

– *0.00°

– FLOAt

12) Fractional Mode – Standard (fractions are displayed to the nearest fraction)

– Constant (fractions are displayed in the set fractional resolution)

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How to Set Preferences

The following sections detail Preference Setting options for the

Construction Master Pro calculators.

Enter the Preference Mode by pressing

Ç ß

(Prefs). Access each category by pressing the

ß key until you reach the desired setting. Within each category, press the

+ or

– keys to toggle between individual selections. Press o to exit and set your

Preference.

Note: Press

+ to advance and press

– to back up. Pressing the

ß key continuously in this mode will cycle through all of the Preference Settings.

You may change these settings at any time by repeating the above, and setting in a new preference.

To reset preferences back to factory default settings, turn your calculator off, hold down the x key and turn the calculator back on.

For example, if you wish to display all your dimensional area answers in square meters, press

Ç ß ß

(Area Std), then the

+ key until “AREA 0.

SQ M

” is displayed. Simply exit this mode by pressing o or any key, except

+ or

ß

, and all your future area answers will be displayed in square meters.

Accessing Preference Settings

KEYSTROKE

To Set “Fractional Resolution”:

Ç ß

(Prefs) (1st press of

ß

)

+

(plus sign)

+

+

+

+

+

(repeats options)

To Set “Area” Answer Format:

ß

(2nd press of

ß

)

+

(plus sign)

+

+

+

(repeats options)

DISPLAY

FRAC 0-1/16

FRAC 0-1/32

FRAC 0-1/64

FRAC 0-1/2

FRAC 0-1/4

FRAC 0-1/8

FRAC 0-1/16

INCH

INCH

INCH

INCH

INCH

INCH

INCH

AREA Std.

AREA 0.

SQ FEET

AREA 0.

SQ YD

AREA 0.

SQ M

AREA Std.

(Cont’d)

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(Cont’d)


To Set “Volume” Answer Format:

ß

(3rd press of

ß

)

+

(plus sign)

+

+

+

(repeats options)

VOL Std.

VOL 0.

VOL 0.

CU YD

CU FEET

VOL 0.

CU M

VOL Std.

To Increase or Decrease Stairwell “Headroom” from Default of 6’8”:

ß

(4th press of

ß

)

HDRM 6

FEET

8

INCH

+

*

(plus sign increases height by 1 Inch)

HDRM 6

FEET

9

INCH

–

*

(minus sign decreases height by 1 Inch) HDRM 6

FEET

8

INCH

*Keep pressing

+ or

– to increase or decrease an Inch at a time.

To Set Rake-Wall Stud Sizes to “Descending” or “Ascending”:

ß

(5th press of

ß

)

+

(plus sign)

+

(repeats options)

RAKE dESCEnd

RAKE ASCEnd

RAKE dESCEnd

To Set Arched Wall Calculations to “Outside” or “Inside”:

ß

(6th press of

ß

)

+

(plus sign)

+

(repeats options)

AW outSidE

AW inSidE

AW outSidE

To Set Jack Rafter to “Descending” or “Ascending”:

ß

(7th press of

ß

)

+

(plus sign)

+

(repeats options)

JACK dESCEnd

JACK ASCEnd

JACK dESCEnd

To Set Irregular Jack Spacing to “On-Center” or “Mate”:

ß

(8th press of

ß

)

+

(plus sign)

+

(repeats options)

IRJK OC-OC

IRJK JAC-JAC

IRJK OC-OC

To Set “Exponential Mode” On or Off:

ß

(9th press of

ß

)

+

(plus sign)

+

(repeats options)

EXP OFF

EXP On

EXP OFF

(Cont’d)

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(Cont’d)


To Set “Meter” Linear Decimal Format:

ß

(10th press of

ß

)

+

(plus sign)

+

(repeats options)

METR 0.000

METR FLOAt

METR 0.000

M

M

M

To Set “Number of Decimal Places for Degree Displays”:

ß

(11th press of

ß

)

+

(plus sign)

+

(repeats options)

DEG 0.00°

DEG FLOAt

DEG 0.00°

To Set Fractional Mode to “Standard” or “Constant”:

ß

(12th press of

ß

)

+

(plus sign)

+

(repeats options)

Note: Press o at any time to exit the Preference Mode.

Std.

COnSt

Std.

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APPENDIX C — CARE INSTRUCTIONS

Please follow the guidelines listed in this section for proper care and operation of your calculator. Not following the instructions listed below may result in damage not covered by your warranty. Refer to the Repair and Return section on page 95 for more details.

Do not expose calculator to temperatures outside the operating temperature range of 32ºF – 104ºF (0ºC – 40ºC).

Do not expose calculator to high moisture such as submersion in water, heavy rain, etc.

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APPENDIX D — IMPORTANT NOTES FOR OWNERS

OF PREVIOUS CONSTRUCTION MASTERS

If you are an owner of a previous Construction Master v3.0 calculator, the following list will help you compare several new or enhanced features available on selected Construction Master Pro v3.1 calculators.

NEW/ENHANCED FUNCTION DESCRIPTION

Accumulative Memory (M+) – Now also displays the average and the count upon repeated key presses of

µ

.

Arc and Circle Calculations – Arc and Circle values can now be solved by entering any two of the following values:

Arc Length/Angle, Diameter/Radius, Chord

Length, and Segment Rise.

Arched Segment Walls

Blocks Function

Compound Miter

Column/Cone Function

– Now calculates the segment walls outside the arc (including a base, if needed), or calculates the arched segment walls inside the arc, depending upon preference setting.

– Now solves for blocks based on values stored in l only or in l and h

.

– Now calculates the Miter and Bevel angles using the spring (crown) angle

(this is the angle of the crown molding to the wall; previous version 3.0 used the angle of the crown molding to the ceiling).

– Column/Cone Height is now entered using the h key instead of the r key (excludes Model #4080).

Footing Function

Height

Jack Rafters

– Default footing area is now 264 Square

Inches (instead of 1.8 Square Feet).

– Displays Volume, Wall Area, and

Room Area only (excludes display of

Area, Square-Up, and Perimeter, which are displayed in the Width function).

– Now displays the incremental adjustment, which is the difference in rafter length from one rafter to the next.

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APPENDIX E — ACCURACY/ERRORS,

AUTO SHUT-OFF, BATTERIES, RESET

ACCURACY/ERRORS

Accuracy/Display Capacity — Your calculator has a twelve-digit display made up of eight digits (normal display) and four fractional digits. You may enter or calculate values up to 19,999,999.99. Each calculation is carried out internally to twelve digits.

Errors — When an incorrect entry is made, or the answer is beyond the range of the calculator, it will display the word “ERROR.” To clear an error condition you must hit the o button once. At this point you must determine what caused the error and re-key the problem.

Error Codes

DISPLAY

OFLO

MATH Error

DIM Error

ENT Error

TRIG Error

None

ERROR TYPE

Overflow (too large)

Divide by 0

Dimension error

Invalid entry error

Trig. error (for example, tan of 1 foot)

Attempt to calculate stairs without entering rise and run

Auto-Range — If an “overflow” is created because of an input and calculation with small units that are out of the standard seven-digit range of the display, the answer will be automatically expressed in the next larger units (instead of showing “ERROR”) — e.g.,

20,000,000 mm is shown as 20,000 m. Also applies to inches, feet and yards.

Note: If Exponential Notation is activated through the Preference Setting, the value will be shown in scientific notation (e.g., 20 million mm—2.00000

07 mm).

AUTO SHUT-OFF

Your calculator is designed to shut itself off after about 8-12 minutes of non-use.

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BATTERIES

• Construction Master Pro v3.1 (#4065) and Construction Master Pro

Trig v3.1 (#4080)

Two LR-44 batteries.

• Construction Master Pro Desktop v3.1 (#44080)

One 3-Volt Lithium CR-2032 battery.

Replacing the Battery(ies)

Should your calculator display become very dim or erratic, replace the battery(ies).

Note: Please use caution when disposing of your old battery, as it contains hazardous chemicals.

Replacement batteries are available at most discount or electronics stores. You may also call Calculated Industries at 1-775-885-4900.

Battery Replacement Instructions

•

The Hand-held Models —

–

Construction Master Pro v3.1 (#4065)

–

Construction Master Pro Trig v3.1 (#4080)

To replace the batteries, slide open the battery door (at top backside of unit) and replace with new batteries. Make sure the batteries are facing positive side up.

• Construction Master Pro Desktop v3.1 (#44080):

To replace the battery, use a small Phillips’ head screwdriver and unscrew the two (2) screws on the base of the unit.

Carefully remove the lower back housing. Remove the battery from the clip and replace it with a new battery, with the positive side up. Then replace the backplate and reattach the screws.

RESET

If your calculator should ever “lock up,” press Reset — a small hole located above the p key (below the

Ç key on the

Construction

Master Pro Desktop) — to perform a total reset.

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APPENDIX F — AREA/VOLUME FORMULAS

AREA FORMULAS

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SURFACE AREA/VOLUME FORMULAS

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REPAIR AND RETURN

WARRANTY, REPAIR AND RETURN INFORMATION

Return Guidelines

1.

Please read the Warranty in this User's Guide to determine if your Calculated Industries product remains under warranty

before calling or returning any device for evaluation or repairs.

2.

If your product won't turn on, check the batteries as outlined in the User's Guide.

3.

If you need more assistance, please go to the website listed below.

4.

If you believe you need to return your product, please call a

Calculated Industries representative between the hours of

8:00am to 4:00pm Pacific Time for additional information and a

Return Merchandise Authorization (RMA).

Call Toll Free: 1-800-854-8075

Outside USA: 1-775-885-4900 www.calculated.com/warranty

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WARRANTY

Warranty Repair Service – U.S.A.

Calculated Industries (“CI”) warrants this product against defects in materials and workmanship for a period of one (1) year from the date of original

consumer purchase in the U.S. If a defect exists during the warranty period, CI at its option will either repair (using new or remanufactured parts) or replace (with a new or remanufactured calculator) the product at no charge.

THE WARRANTY WILL NOT APPLY TO THE PRODUCT IF IT HAS BEEN

DAMAGED BY MISUSE, ALTERATION, ACCIDENT, IMPROPER HANDLING

OR OPERATION, OR IF UNAUTHORIZED REPAIRS ARE ATTEMPTED

OR MADE. SOME EXAMPLES OF DAMAGES NOT COVERED BY WAR-

RANTY INCLUDE, BUT ARE NOT LIMITED TO, BATTERY LEAKAGE,

BENDING, A BLACK “INK SPOT” OR VISIBLE CRACKING OF THE LCD,

WHICH ARE PRESUMED TO BE DAMAGES RESULTING FROM MISUSE

OR ABUSE.

To obtain warranty service in the U.S., please go to the website.

A repaired or replacement product assumes the remaining warranty of the original product or 90 days, whichever is longer.

Non-Warranty Repair Service – U.S.A.

Non-warranty repair covers service beyond the warranty period, or service requested due to damage resulting from misuse or abuse.

Contact Calculated Industries at the number listed above to obtain current product repair information and charges. Repairs are guaranteed for 90 days.

Repair Service – Outside the U.S.A.

To obtain warranty or non-warranty repair service for goods purchased outside the U.S., contact the dealer through which you initially purchased the product. If you cannot reasonably have the product repaired in your area, you may contact CI to obtain current product repair information and charges, including freight and duties.

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Disclaimer

CI MAKES NO WARRANTY OR REPRESENTATION, EITHER EXPRESS

OR IMPLIED, WITH RESPECT TO THE PRODUCT’S QUALITY, PERFOR-

MANCE, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PUR-

POSE. AS A RESULT, THIS PRODUCT, INCLUDING BUT NOT LIMITED

TO, KEYSTROKE PROCEDURES, MATHEMATICAL ACCURACY AND

PREPROGRAMMED MATERIAL, IS SOLD “AS IS,” AND YOU THE PUR-

CHASER ASSUME THE ENTIRE RISK AS TO ITS QUALITY AND PER-

FORMANCE.

IN NO EVENT WILL CI BE LIABLE FOR DIRECT, INDIRECT, SPECIAL,

INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY

DEFECT IN THE PRODUCT OR ITS DOCUMENTATION.

The warranty, disclaimer, and remedies set forth above are exclusive and replace all others, oral or written, expressed or implied. No CI dealer, agent, or employee is authorized to make any modification, extension, or addition to this warranty.

Some states do not allow the exclusion or limitation of implied warranties or liability for incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific rights, and you may also have other rights, which vary from state to state.

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FCC Class B

This equipment has been certified to comply with the limits for a Class B calculating device, pursuant to Subpart J of Part 15 of FCC rules.

Legal Notes

Software copyrighted and licensed to Calculated Industries by Construction

Master Technologies, LLC, 2005.

User’s Guide copyrighted by Calculated Industries, Inc., 2005.

Construction Master® and Calculated Industries® are registered trademarks of Calculated Industries, Inc.

PATENT PENDING

ALL RIGHTS RESERVED

Designed in the U.S.A.

Looking For New Ideas

Calculated Industries, a leading manufacturer of special-function calculators and digital measuring instruments, is always looking for new product ideas in these areas.

If you have an idea, or a suggestion for improving this product or User’s

Guide, please submit your comments online at: www.calculated.com under

“Contact Us”, “Product Idea Submittal Agreement”. Thank you.

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INDEX

Accuracy/Errors, 91

Adding Linear Measurements, 29

Angle – Rise and Hypotenuse Known, 81

Angle and Diagonal (Hypotenuse), 59

Arc Caculations – Arc Length and Diameter Known, 40

Arc Length, 39

Arched Segment Walls, 41

Arched Windows, 41, 42

Area and Volume Keys (Not Available on Trig Model #4080), 4

Area Calculations, 31

Area, Rectangular, 31

Area, Square, 31

Area/Volume Formulas, 93

Auto Shut-Off, 91

Baluster Spacing, 77

Basic Math with Dimensions, 24

Basic Operation Keys, 1

Batteries, 92

Block/Brick Function, 6

Blocks, Number of, Based on Calculated Perimeter, 36

Blocks, Number of, Based on Entered Area, 35

Blocks, Number of, Based on Entered Length, 36

Blocks, Number of, Based on Entered Length and Height, 35

Board Feet – With Dollar Cost, 38

Board Feet, Number of, Based on Entered Volume, 38

Bricks (Face), Number of, 37

Bricks (Paver), Number of, 37

Center Point, Calculating, 30

Circular/Arc Function Keys, 7

Circumference and Area of a Circle, 39

Column/Cone Function, 8

Common Rafter Length, 58

Common Rafter Length – Pitch Unknown, 58

Compound Miter/Crown Moulding Example, 45

Compound Miter/Crown Moulding Keys, 8

Concrete (Driveway), Volume, 46

Concrete Columns, 47

Concrete Footings, 50

Concrete Volume, Complex, 48

Concrete/Paving, 46

Cone, Volume, 33

Construction Master, New Features, 90

Construction Project Keys and Functions, 6

Conversions, Area/Square, 23

Conversions, Linear, 22

Conversions, Volume/Cubic, 23

Conversions, Weight, 34

Conversions/Weight per Volume, 34

Convert

Ç

Key, 1

Convert Degree of Pitch, 57

Convert Percent Grade, 57

Converting Decimal Feet to Feet-Inch-Fractions, 22

Converting Decimal Inches to Fractional Inches, 23

Converting Degrees:Minutes:Seconds, 78

Converting Feet-Inch-Fractions to Decimal Feet, 22

Converting Fractional Inches to Decimal Inches, 23

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Converting Percent Grade to D:M:S, 80

Converting Roof Angle in Degrees to Pitch in Inches, 80

Converting Tangent/Pitch to Angle, 80

Cutting Boards, 29

Cylinder, Volume, 33

Default Settings, 82

Degrees:Minutes:Seconds, Converting, 78

Dimensional Measurement Unit Keys, 3

Dimensions (Linear), Entering, 18

Dimensions (Square/Cubic), Entering, 18

Dimensions, Adding, 24

Dimensions, Dividing, 24

Dimensions, Multiplying, 24

Dimensions, Subtracting, 24

Drywall, 52

Drywall Function (Not Available on Trig Model #4080), 9

Drywall Sheets, Number of (For a Given Area), 52

Drywall Sheets, Number of (For a Given Length), 52

Entering Dimensions, 18

Error Codes, 91

Examples, 29

Footing Function, 9

Grade/Slope, 53

Hip/Valley and Jack Rafter Keys, 11

Hip/Valley Rafter, 12

Irregular Pitch, 12

Irregular Side Jacks, 13

Irregular Hip/Valley and Jack Rafters, 62, 64

Jack Rafters, 12

Jack Rafters – Using Other Than 16 Inch, 61

Key definitions, 1

Lumber Estimation, 38

Memory and Storage Functions, 2

Memory Operation, 25

Multi-Function h

Example, 32

Multi-Function

W

Example, 31

Paperless Tape Operation, 27

Percentage Calculations, 25

Pitch Ratio, 57

Polygon, Example, 49

Polygon Function, 9

Preference Settings, Appendix B, 83

Preferences, How to Set, 86

Rake-Wall Function, 13

Rake-Wall – No Base, 66

Rake-Wall – With Base, 67

Recall

®

Key, 3

Regular Hip/Valley and Jack Rafters, 60

Reset, 92

Right Triangle and Roof Framing, 54

Right Triangle/Roof Framing Keys, 10

Rise, 59

Rise and Diagonal, 59

Roof Covering – Entering Pitch, Length and Width, 68

Roof Covering –

Entering Rise, Run (No Pitch) and Area, 69

Roof Framing Definitions, 55

Roof Materials/Covering Function, 14, 68

Setting Fractional Resolution, 20

Sheathing Cut, 60

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Square Area, 31

Squaring-Up a Foundation, 51

Stair Key, 14

Stair Layout Definitions, 70

Stair Layout Examples, 70

Stairs – Given Only Floor-to-Floor Rise, 72

Stairs –

Given Only the Run, 74

Stairs – Given Rise and Run, 75

Stairs – Given Rise and Run, Using “Riser Limited” Function for Code Restrictions, 76

Studs Function, 16

Studs, Number of, 78

Time Calculations Using D:M:S, 78

Trigonometric Keys (Trig #4080 and Desktop #44080 Models only), 16

Volume Calculations, 32

Volume, Concrete Columns , 47

Volume, Concrete (Complex), 48

Volume, Concrete (Driveway), 46

Volume, Cone, 33

Volume, Cylinder, 33

Volume, Rectangular Containers, 32

Warranty, 96

Warranty Repair Service, 96

Weight Keys, 5

Window Measurement, 30

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UG4065E-D

Calculated Industries 4065 Construction Master Pro v3.0 User's Guide

ONSTRUCTION

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User s Guide

For Models:

4065 v3.1 Construction Master Pro

4080 v3.1 Construction Master Pro Trig

44080 v3.1 Construction Master Pro Desktop

C

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INTRODUCTION

TABLE OF CONTENTS

GETTING STARTED

KEY DEFINITIONS

ENTERING DIMENSIONS

SETTING FRACTIONAL RESOLUTION

CONVERSIONS (LINEAR, AREA, VOLUME)

PERFORMING BASIC MATH WITH DIMENSIONS

MEMORY OPERATION

PAPERLESS TAPE OPERATION

EXAMPLES — USING THE CONSTRUCTION

MASTER PRO

LINEAR MEASUREMENT EXAMPLES

AREA CALCULATIONS

VOLUME CALCULATIONS

WEIGHT/VOLUME CONVERSIONS

BLOCKS/BRICKS (

#4080)

BOARD FEET — LUMBER ESTIMATION

CIRCLE AND ARC CALCULATIONS

ARCHED SEGMENT WALLS

COMPOUND MITER

CONCRETE/PAVING

DRYWALL (

#4080)

GRADE/SLOPE

RIGHT TRIANGLE AND ROOF FRAMING EXAMPLES

ROOFING MATERIALS

STAIR LAYOUT EXAMPLES

STUDS

BASIC D:M:S AND TRIGONOMETRY EXAMPLES

TRIGONOMETRIC FUNCTIONS

APPENDIX A — DEFAULT SETTINGS

APPENDIX B — PREFERENCE SETTINGS

APPENDIX C — CARE INSTRUCTIONS

APPENDIX D — IMPORTANT NOTES FOR OWNERS

OF PREVIOUS CONSTRUCTION MASTERS

APPENDIX E — ACCURACY/ERRORS,

AUTO SHUT-OFF, BATTERIES, RESET

ACCURACY/ERRORS

AUTO SHUT-OFF

BATTERIES

RESET

APPENDIX F — AREA/VOLUME FORMULAS

AREA FORMULAS

SURFACE AREA/VOLUME FORMULAS

REPAIR AND RETURN

WARRANTY, REPAIR AND RETURN INFORMATION

WARRANTY

INDEX

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