Calculated Industries 44080 Construction Master Pro-Desktop Reference Guide

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For Models:

4065 v3.1 − Construction Master Pro

4080 v3.1 − Construction Master Pro Trig

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3.1

The Construction Master Pro calculators help you save time, cut costly errors and build like a pro!

Quickly Solve:

• Feet-Inches-Fractions, Yards, Metric

Dimensional Problems and

Conversions

• Problems Involving All Fractions –

1/2 through 1/64ths!

• Areas, Volumes and Weights

• Column/Cone Area and Volume

• Blocks/Bricks, Drywall and Footings

( NOT AVAILABLE ON TRIG MODEL #4080)

• Circle/Arc Calculations

• Common, Hip/Valley, Jack Rafter

Lengths (regular and irregular) and

Cut Angles

• Rake-Wall Solutions

• Roofing Materials

• Stair Layout Solutions

• Trig Keys ( TRIG MODEL #4080 ONLY )

TABLE OF CONTENTS

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

Basic Function Keys ............................1

Unit Keys .............................................2

Length, Width and Height Keys (

NOT

AVAILABLE ON TRIG MODEL

#4080) .......2

Circle/Arc Keys ....................................2

Construction Project Keys ...................3

Trigonometric Keys (

TRIG MODEL

#4080)..............................................5

Right Triangle/Roof Framing Keys.......5

Stair Layout Key ..................................7

Customizable Stair Settings ................8

Miscellaneous Functions .....................9

ENTERING DIMENSIONS ....................10

Entering Linear Dimensions ..............10

Entering Square/Cubic Dimensions ...11

EXAMPLES ...........................................12

Adding and Subtracting Strings of

Dimensions ....................................12

Rectangular Area and Volume...........12

Entering Square and Cubic and Adding a Waste Allowance ........................13

Using Multi-Function h Key (

NOT

AVAILABLE ON TRIG MODEL

#4080) .....13

Dividing Dimensions ..........................14

Linear Conversions............................14

Square and Cubic Conversions.........15

Blocks (

NOT AVAILABLE ON TRIG MODEL

#4080)............................................15

Board Feet and Cost .........................15

Circle Area and Circumference..........16

Circle/Arc Properties..........................16

Compound Miter ................................17

Concrete Columns .............................18

Concrete Footings (

NOT AVAILABLE ON

TRIG MODEL

#4080) .........................19

Concrete Volume for Driveway ..........19

Converting D:M:S ..............................20

Drywall (

NOT AVAILABLE ON TRIG MODEL

#4080)............................................20

Polygon – Brick Paving......................20

Roofing Materials...............................21

Squaring-Up a Foundation ................22

Studs..................................................22

RIGHT ANGLE/FRAMING ....................24

Pitch – Converting Roof Angle ..........24

Converting Slope ...............................24

Angle – Rise and Hypotenuse Known

(

TRIG

#4080

AND DESKTOP

#44080

MODELS ONLY

) ..................................24

Common Rafter Length .....................25

Regular Hip/Valley and Jack Rafters ..26

Irregular Hip/Valley ............................27

Rake-Wall – No Base ........................28

Rake-Wall – With Base......................29

STAIRS ..................................................30

Stairs – Given Rise and Run .............30

Stairs – Given Rise Only ...................31

Stairs – Riser Limited Function .........32

DEFAULT SETTINGS ...........................33

KEY DEFINITIONS

Basic Function Keys

+ – x

÷ =

%

Arithmetic operation keys.

0

O

– and o

Ç

ß

®

9

•

Four-function (+, –, x, ÷) percent key.

Keys used for entering numbers.

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

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

Convert Key — Used with the dimensional keys to convert between dimensions or with other keys to access special functions.

Store Key — Used for storing values.

Recall Key — Recalls stored values.

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Unit Keys y f i

/ m

Ç 7

Ç 9

Ç 2

Yards

Feet

Inch

Fraction Bar

Meters

Centimeters

Millimeters

Acres

Length, Width and Height Keys

(

NOT AVAILABLE ON TRIG MODEL

#4080) l Enters length for calculation of area or volume.

W Calculates area, square-up and perimeter.

h Calculates volume, wall area and total room area.

Circle/Arc Keys

C Circle — Calculates circle area and circumference.

a Calculates Arc Length or

Degree, chord length, segment area, pie slice area, segment rise, and length of arched segment wall studs.

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Ç a Radius — Enters or calculates circle radius.

Construction Project Keys

Ç l Blocks/Bricks — Finds the number of blocks or bricks for a given area and stored block/brick size.

ß 4 — Stores block or brick size (default: 128

Square Inches area and

16 Inches length).

Ç 8 Board Feet — Enters or converts cubic values to

Board Feet.

 Compound Miter —

Calculates (based on entered spring and wall corner angle) miter angle, and bevel angle for cutting crown moulding.

ß Â —Stores value other than default spring

(crown) angle of 45°.

Ç C Column/Cone —

Calculates the volume and surface area of a Column and/or Cone.

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Ç h

Ç W

Ç d

Ç R

Ç 5

Drywall — Calculates number of 4 x 8, 4 x 9 and 4 x 12 drywall sheets based on entered or calculated area.

Footing — Finds quantity of concrete, based on entered wall length and stored footing area.

ß 6 — Stores footing area (default: 264 Square

Inches).

Roof — Calculates roof area, number of roof squares and bundles, and number of 4 x 8 sheets based on an entered or calculated plan area.

Polygon — Calculates full angle, bi-sect angle, side length, perimeter and area based on entered radius and number of sides.

Studs — Calculates number of studs based on stored On-center spacing and entered length of wall.

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Trigonometric Keys (

TRIG MODEL

#4080)

S Finds the sine of a degree or undimensioned value.

Ç S Arcsine (sin -1 ) — Gives the angle for the Sine value.

ç

Ç ç

Finds the Cosine.

Arccosine (cos -1 ) —

Gives the angle for the

Cosine value.

t

Ç t

Finds the Tangent.

Arctangent (tan -1 ) —

Gives the angle for the

Tangent value.

Right Triangle/Roof Framing Keys p Enters or calculates the slope (amount of “Rise” over 12” of “Run”.

Ç p r

Slope — Enters a Pitch ratio, or slope (e.g., • 5

8 3 Ç p ).

Enters or calculates the vertical leg of a right triangle.

Ç r Rake-Wall — Finds the stud sizes based on entered right triangle values.

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R d

H

Ç H j

Ç j

Enters or calculates the horizontal leg of a right triangle.

Diagonal — Enters or calculates the Diagonal leg, or Common rafter.

Hip/Valley — Calculates length of the regular or irregular Hip/Valley rafter.

Enters irregular pitch used to calculate lengths of the irregular Hip/Valley and

Jack rafters.

Calculates Jack rafter lengths on the regularpitched roof side.

Calculates Jack rafter lengths on the irregularpitched roof side.

ß 5 — Stores On-center spacing value (default: 16") for rafters and Rake-Walls.

Also used for studs.

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Stair Layout Key s Given rise and/or run and stored variables, calculates or displays:

7

8

9

10

4

5

6

2

3

Press Result

1 Riser Height

Number of Risers

Riser Overage/

Underage

Tread Width

Number of Treads

Tread Overage/

11

Underage

Stairwell Opening

Stringer Length

Angle of Incline

Stored or

Calculated Run

Stored or

Calculated Rise

12

13

14

15

Stored Desired

Riser Height

Stored Desired

Tread Width

Stored Headroom

Stored Floor

Thickness

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Ç s Riser Limited —

Recalculates Riser Height and other stair values if you’re limited by local code. The calculated Riser

Height will never exceed the stored Desired Riser

Height.

STAIR DEFAULT VALUES

• 7-1/2” Desired Riser Height

• 10” Desired Tread Width

• 10” Floor Thickness

• 6’8” Headroom

Customizable Stair Settings

ß 7 Stores Desired Riser

Height.

ß 9 Stores Desired Tread

Width.

ß 8 Stores Floor Thickness.

Ç ß ß Sets Headroom. See

ß ß large User’s Guide,

Preference Settings, for details.

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Miscellaneous Functions

B

® =

Ç ß

Ç ÷

Ç x

Ç –

Ç +

Ç •

Backspace Key

Paperless Tape

Preference Settings

(1/x) Reciprocal

Clear All

(+/–) Toggle

Pi (

π

) 3.141593

Converts between D:M:S and Decimal Degrees.

Ç %

Ç B

Ç /

Ç 0 x

(

2

) Square Root

Exponential Notation (x10 y )

Total Cost (based on entry of per unit cost)

ß 0

Ç 6

Ç 4

Ç 3

Stores Weight per Volume

Tons

Pounds

Metric Tons

Ç 1

µ

Kilograms

Memory +

Ç µ (M–) Memory Minus

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ß 1

ß 2

ß 3

® ®

(M1) Storage Register

(M2) Storage Register

(M3) Storage Register

Recall and Clear M+

® µ , 1 , Recall M+, M1, M2 or M3

2 or 3

ENTERING DIMENSIONS

Entering Linear Dimensions

Examples of entering Linear Dimensions:

DIMENSION KEYSTROKE

Clear calculator o

5 Feet 1-1/2 Inch

5 f 1 i 1 / 2 *

Clear calculator

5 Yards o

5 y

Clear calculator

17.5 Meters

Clear calculator

100 Centimeters

Clear calculator

500 Millimeters o

1 7 • 5 m o

1 0 0 Ç 7 o

5 0 0 Ç 9

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

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Entering Square/Cubic Dimensions

Examples of entering Square and Cubic

Dimensions:

KEYSTROKE DISPLAY o o 0.

Enter numeric value and press desired unit key once to label value as “Linear:”

1 0 0 f 100

FEET

KEYSTROKE DISPLAY o o 0.

Enter numeric value and press desired unit key twice to label value as “Square:”

1 0 0 f f 100

SQ FEET

KEYSTROKE DISPLAY o o 0.

Enter numeric value and press desired unit key three times to label value as “Cubic:”

1 0 0 f f f 100

CU FEET

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

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

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EXAMPLES

Adding and Subtracting Strings of

Dimensions

Add the following measurements:

• 6 Feet 2-1/2 Inches

• 11 Feet 5-1/4 Inches

• 18.25 Inches

Then subtract 2-1/8 Inches.

KEYSTROKE DISPLAY

6 f 2 i 1 / 2 +

1 1 f 5 i 1 / 4 +

1 8 • 2 5 i = 19

FEET

2

INCH

– 2 i 1 / 8 = 18

FEET

11-7/8

INCH

Rectangular Area and Volume*

Find the area and volume:

• Length: 20 Feet 6-1/2 Inches

• Width: 12 Feet 8-1/2 Inches

• Height: 18 Inches

KEYSTROKE DISPLAY

2 0 f 6 i 1 / 2 l

1 2 f 8 i 1 / 2 W W

AREA 261.0503

SQ FEET

1 8 i h h VOL 14.5028

CU YD

*If using the Trig model (#4080), multiply (LxWxH) in Feet-Inches-Fractions.

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Entering Square and Cubic and Adding a Waste Allowance

Add a 10% waste allowance to 55 Square

Feet. Then add a 20% waste allowance to 150 Cubic Feet:

KEYSTROKE DISPLAY

5 5 f f + 1 0 % 60.5

SQ FEET

1 5 0 f f f + 2 0 %

180.

CU FEET

Using Multi-Function h Key

(

NOT AVAILABLE ON TRIG MODEL

#4080)

Find the volume, wall area and total room area of a room measuring 15’ x 20’. The room is 8’ tall.

KEYSTROKE o o

1 5 f l

2 0 f W

8 f h h h h

DISPLAY

0.

LNTH 15

FEET

0

INCH

WDTH 20

FEET

0

INCH

HGHT 8

FEET

0

INCH

VOL 2400.

CU FEET

WALL 560.

SQ FEET

ROOM 860.

SQ FEET

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Dividing Dimensions

Divide 15 Feet 3-3/4 Inches into thirds

(divide by 3):

KEYSTROKE DISPLAY

1 5 f 3 i 3 / 4 ÷ 3 =

5

FEET

1-1/4

INCH

Linear Conversions

Convert 10 Feet 6 Inches to other dimensions, including Metric:

KEYSTROKE DISPLAY

1 0 f 6 i

Ç f *

Ç i *

Ç y

Ç m

Ç 9 (mm)

Ç 7 (cm)

10

FEET

6

10.5

126.

INCH

FEET

INCH

3.5

3200.4

320.04

YD

3.200

M

MM

CM

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

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Square and Cubic Conversions

Convert 14 Square Feet to Square Yards:

KEYSTROKE

1 4 f f

Ç y

DISPLAY

14

SQ FEET

1.555556

SQ YD

Convert 12 Cubic Feet to Cubic Yards:

KEYSTROKE

1 2 f f f

Ç y

DISPLAY

12

CU FEET

0.444444

CU YD

Blocks (

NOT AVAILABLE ON TRIG MODEL

#4080)

How many blocks (block size 8” x 16”) will you need to build a retaining wall measuring 8’ x 22’?

KEYSTROKE o o

8 f x 2 2 f =

Ç l (Blocks)

DISPLAY

0.

176.

SQ FEET

BLKS 198.

Board Feet and Cost

Find the total Board Feet for the following boards: 2 x 4 x 16, 2 x 10 x 18 and

2 x 12 x 20. What is the total cost at

$275 per MBM?

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(Cont’d)

(Cont’d)

KEYSTROKE DISPLAY o o

2 x 4 x 1 6 Ç 8 µ

BDFT 10.66667

2 x 1 0 x 1 8 Ç 8 µ

BDFT 30.

2 x 1 2 x 2 0 Ç 8 µ

BDFT 40.

0.

M

M

M

® ® x 2 7 5 Ç 0 (Cost)

BDFT 80.66667

$22.

18

Circle Area and Circumference

Find the area and circumference of a circle with a diameter of 25 Inches:

DISPLAY KEYSTROKE o o

2 5 i C

C

C

0.

DIA 25

INCH

AREA 490.8739

SQ INCH

CIRC 78-9/16

INCH

Circle/Arc Properties

Find Arc properties given a 5-foot diameter and an Arc length of 3 Feet 3 Inches:

KEYSTROKE DISPLAY

1. Enter Circle diameter and Arc length: o o 0.

5 f C DIA 5

FEET

0

INCH

3 f 3 i a ARC 3

FEET

3

INCH

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2. Find Degree of Arc, Chord Length,

Segment Area, Pie Slice Area and

Segment Rise: a a a a a

CORD 3

RISE 0

ARC 74.48°

FEET

SEG 1.051381

PIE 4.0625

FEET

0-5/16

SQ FEET

SQ FEET

6-1/8

INCH

INCH

*

*You may also find arched segment wall stud sizes, based on the stored o.c. After the segment rise, the calculator will display the stored o.c., then calculate the stud sizes with each successive press of the a key. See large User’s Guide for example.

Compound Miter

If the wall corner angle is 60° and the spring (crown) angle is 38°, find the miter angle and bevel angle for installing crown moulding:

KEYSTROKE DISPLAY o o

3 8 ß Â

6 0 Â

Â

Â

Â

SPRG

0.

STORED

38.00°

MITR 46.84°

SPRG

BEVL 43.03°

STORED

38.00°

CRNR 60.00°

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Concrete Columns

Find the total Cubic Yards and Tons of concrete (using 1.5 tons per cu. yd) required for three (3) columns, each with a diameter of 5 Feet 2-3/4 Inches and a height of 10 Feet:

KEYSTROKE DISPLAY

1. Recall stored Weight per Volume: o o

® 0

STORED

1.5

0.

Ton Per CU YD

2. Enter diameter:

5 f 2 i 3 / 4 C

DIA 5

FEET

2-3/4

INCH

3. Find total volume:

1 0 f h Ç C (Column/Cone)

COL 214.7607

CU FEET

Ç y x 3 =

7.954101

23.8623

CU YD

CU YD

4. Convert to tons:

Ç 6 (ton) 35.79345

Ton

Trig Model (#4080) Users: As this model does not have a h key, you must enter the height using the r key.

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Concrete Footings (

NOT AVAILABLE ON

TRIG MODEL

#4080)

Find the volume of concrete required for an 8” x 16” footing that measures 100

Feet in length:

KEYSTROKE DISPLAY o o

8 i x 1 6 i = 128.

0.

SQ INCH

ß 6 F-AR

STORED

128.

1 0 0 f Ç W (Footing)

SQ INCH

FTG 3.292181

CU YD

Concrete Volume for Driveway

Calculate the Cubic Yards of concrete required to pour a driveway that measures:

45 Feet 5 Inches long x 13 Feet 6 Inches wide x 5 Inches deep. If concrete is $65 per Cubic Yard, what will it cost?

KEYSTROKE o o

4 5 f 5 i x 1 3 f 6 i x 5 i = x 6 5 Ç 0 (Cost)

DISPLAY

0.

45

FEET

5

INCH

13

FEET

6

INCH

9.461806

CU YD

$615.

02

(total cost)

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Converting D:M:S

Convert 23° 42’ 39” to decimal degrees:

KEYSTROKE DISPLAY o o 0.

2 3 • 4 2 • 3 9 DMS 23.42.39

Ç • (dms deg) 23.71°

Drywall

(

NOT AVAILABLE ON TRIG MODEL

#4080)

Find the number of 4 x 8, 4 x 9 and 4 x 12 sheets needed to cover an area of 125

Square Feet:

KEYSTROKE o o

1 2 5 f f

Ç h (Drywall) h h

DISPLAY

0.

125

SQ FEET

4X8 3.90625

4X9 3.472222

4X12 2.604167

Polygon — Brick Paving

Find the Full Angle, Bi-sect Angle, Side

Length, Perimeter and Area of a Polygon for paving a brick patio. The radius is 7

Feet 5 Inches and the number of sides is five:

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KEYSTROKE DISPLAY o o

7 f 5 i Ç a (Radius)

0.

RAD 7

FEET

5

INCH

5 Ç R (Polygon)

R

R

R

R

SIDE 8

PER 43

FULL 108.00°

HALF 54.00°

FEET

FEET

8-5/8

7-1/8

AREA 130.7868

INCH

INCH

SQ FEET

Roofing Materials

Find the roof area, number of roofing squares and bundles of shingles, stored bundles size, and number of 4 x 8 sheets needed for an 8” pitched roof covering a floor size of 15’ x 13’:

KEYSTROKE DISPLAY o o

8 i p PTCH 8

0.

INCH

1 5 f x 1 3 f = 195.

SQ FEET

Ç d (Roof)

ROOF 234.3608

SQ FEET d d d d

SQRS 2.34

BNDL 7.03

B-SZ 33.33

4X8 7.32

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Squaring-Up a Foundation

Square-up a 15’ 6” x10’ 2” foundation:*

KEYSTROKE DISPLAY o o

1 5 f 6 i l

0.

LNTH 15

FEET

6

INCH

1 0 f 2 i W

WDTH 10

FEET

2

INCH

W W SQUP 18

FEET

6-7/16

INCH

*Alternative Method, or for Trig model

(#4080) Owners:

Square-up a 15’ 6” x10’ 2” foundation.

KEYSTROKE DISPLAY o o

1 5 f 6 i R

0.

1 0 f 2 i r

RUN 15

FEET

6

INCH

RISE 10

FEET

2

INCH d DIAG 18

FEET

6-7/16

INCH

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Studs

Find the number of 16-inch On-center studs* required for a wall measuring 25 feet in length:

KEYSTROKE DISPLAY o o

2 5 f Ç 5 (Studs)

*If you are working with a number other than

16 Inches On-center, change it via ß 5

(e.g., 18 Inches o.c., enter 1 8 i ß 5 , then recalculate above).

0.

STUD 20.

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RIGHT ANGLE/FRAMING

Pitch — Converting Roof Angle

Find the % Grade, Slope and Pitch in

Inches if the roof angle is 30.25°:

KEYSTROKE o o

3 0 • 2 5 p p p p

DISPLAY

0.

PTCH 30.25°

%GRD 58.31828

SLP 0.583183

PTCH 7

INCH

Converting Slope

Find the Pitch in Inches, Pitch Degrees, and Percent Grade if the slope is 0.625:

KEYSTROKE DISPLAY o o 0.

• 6 2 5 Ç p (Slope) SLP 0.625 p p p

PTCH 7-1/2

INCH

PTCH 32.01°

%GRD 62.5

Angle — Rise and Hypotenuse Known

(

TRIG

#4080

AND DESKTOP

#44080

MODELS ONLY

)

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:

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KEYSTROKE DISPLAY

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

6 f ÷ 1 0 f =

0.

0.6

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

Ç ç (cos -1 ) 53.13°

Ç • (dms deg) DMS 53.07.48

Common Rafter Length

Find the point-to-point length of the

Common rafter on a 7/12-pitched roof with a span of 28 Feet. What are the angle cuts?

KEYSTROKE DISPLAY

1. Enter Pitch: o o

7 i p PTCH 7

0.

INCH

2. Enter half the span as the run:

2 8 f ÷ 2 =

R

14

RUN 14

FEET

FEET

0

0

INCH

INCH

3. Find the Common and cuts: d d d

DIAG 16

FEET

2-1/2

INCH

PLMB 30.26°

LEVL 59.74°

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Regular Hip/Valley and Jack Rafters

A roof’s Pitch is 9/12 and half the total span is 6 Feet. Find the lengths of the

Common, Hip/Valley and Jack rafters.

Also find the incremental jack adjustment and the cut angles. (Jack rafters at 16”

On-center spacing.)

KEYSTROKE DISPLAY

1. Find the Common rafter length: o o

6 f R

9 i p

RUN 6

FEET

0

PTCH 9

0.

INCH

INCH d (Common) DIAG 7

FEET

6

INCH

2. Find the Hip/Valley rafter length and cut angles; then the incremental jack adjustment, Jack rafter lengths and cut angles:

H

H

H

H j j j j j

H/V 9

JKOC

FEET

STORED

7-1/4

PLMB 27.94°

LEVL 62.06°

CHK1 45.00°

INCR 1

JK 1 5

FEET

FEET

JK 2 4

JK 3 2

FEET

FEET

16

8

10

2

6

INCH

INCH

INCH

INCH

INCH

INCH

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j j j j j

JK 4 0

FEET

JK 5 0

FEET

10

0

INCH

INCH

PLMB 36.87°

LEVL 53.13°

CHK1 45.00°

Irregular Hip/Valley

A roof has a 9/12 Pitch, an irregular

Pitch of 8/12, and half the span is 6 Feet

7 Inches. Solve the Hip/Valley length.

On-center spacing is 16 Inches.

KEYSTROKE DISPLAY

1. Find Common rafter length: o o 0.

9 i p PTCH 9

INCH

6 f 7 i R RUN 6

FEET

7

INCH d DIAG 8

FEET

2-3/4

INCH

2. Enter On-center spacing and irregular

Pitch; find irregular Hip rafter:

1 6 i ß 5 (o.c.)

OC

STORED

8 i Ç H (Ir/Pitch)

16

INCH

IPCH 8

INCH

H IH/V 11

FEET

0-7/8

INCH

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Rake-Wall – No Base

Find each stud size in a Rake-Wall with a peak of 3 Feet 6 Inches, and a length of

5 Feet. Use 16 Inches as your On-center spacing (default; already stored):

KEYSTROKE DISPLAY

1. Enter Rise and Run: o o 0.

3 f 6 i r RISE 3

FEET

6

INCH

5 f R RUN 5

FEET

0

INCH

2. Find stud lengths:

Ç r (R/Wall)

RWOC r r r r

RW 1 2

STORED

FEET

RW 2 1

RW 3 0

6-13/16

FEET

FEET

BASE 0

7-5/8

8-3/8

FEET

16

0

INCH

INCH

INCH

INCH

INCH

3. Find Rake-Wall angle of incline: r RW 34.99°

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— 28

Rake-Wall – With Base

Find each stud size in a Rake-Wall with a peak of 4 Feet, a length of 8 Feet, and a base of 5 Feet. Use 16 Inches as your

On-center spacing:

KEYSTROKE DISPLAY

1. Enter Rise and Run: o o

4 f r

8 f R

0.

RISE 4

FEET

0

INCH

RUN 8

FEET

0

INCH

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

5 f Ç r (R/Wall)

BASE 5

FEET

0

INCH r r r r r r r r

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

16

4

8

0

4

8

0

INCH

INCH

INCH

INCH

INCH

INCH

INCH

RW 26.57°

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— 29

STAIRS

Stairs — Given Rise and Run

You’re going to build a stairway that has a floor-to-floor height of 10 Feet 1 Inch, a run of 12 Feet 5 Inches, and a desired riser height of 7-1/2 Inches (default). Find the stair values:

KEYSTROKE DISPLAY

1. Enter rise and run: o o

1 0 f 1 i r

0.

RISE 10

FEET

1

INCH

1 2 f 5 i R

RUN 12

FEET

5

INCH

2. Recall stored 7-1/2” desired riser height, then find the stair values:

® 7 s s s s s s s s s

R-HT

T-WD

OPEN 9

STRG 15

STORED

FEET

FEET

7-1/2

INCH

R-HT 7-9/16

INCH

RSRS 16.

R+/– 0

INCH

9-15/16

INCH

TRDS 15.

T+/– 0-1/16

10-1/4

7-5/16

INCH

INCH

INCH

INCL 37.27°

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— 30

Stairs — Given Rise Only

You’re building a stairway with a total rise of 9 Feet 11 Inches. Using the default riser height of 7-1/2 Inches and tread width of 10 Inches, find the stair values:

KEYSTROKE DISPLAY

1. Enter known Rise: o o

9 f 1 1 i r

0.

RISE 9

FEET

11

INCH

2. Recall stored desired stair riser height:

® 7 R-HT

STORED

7-1/2

INCH

3. Recall stored desired stair tread width:

® 9 T-WD

STORED

10

INCH

4. Find stair values: s s s s s s s s s

T-WD

STRG 15

R-HT 7-7/16

STORED

FEET

INCH

RSRS 16.

R+/– 0

10

INCH

INCH

TRDS 15.

T+/– 0

OPEN 10

FEET

1

6-15/16

INCH

INCH

INCH

INCL 36.64°

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— 31

Stairs — Riser Limited Function

Calculate stairs using the Riser Limited function, if you must limit the Riser Size to

7-1/2 Inches:

KEYSTROKE DISPLAY

1. Enter Rise and Run: o o

1 0 f 1 i r

0.

RISE 10

FEET

1

INCH

1 2 f 5 i R

RUN 12

FEET

5

INCH

2. Recall stored 7-1/2” Desired Riser height and find stair values:

® 7 R-HT

STORED

Ç s (Riser Limited)

7-1/2

INCH

R-HT 7-1/8

INCH s s s s s s s s

T-WD

OPEN 9

STRG 15

FEET

FEET

RSRS 17.

R+/– 0-1/8

9-5/16

INCH

INCH

TRDS 16.

T+/– 0

9-5/8

7-5/8

INCH

INCH

INCH

INCL 37.42°

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— 32

DEFAULT SETTINGS

After a Clear All ( Ç x ), your calculator will return to the following settings:

STORED VALUES DEFAULT VALUE

Desired Riser Height

Desired Tread Width

Floor Height

7-1/2

INCH

10

INCH

10

INCH

On-center Spacing

Weight per Volume

16

INCH

1.5

Ton Per CU YD

Block Area (except Trig model)

128.

SQ INCH

Block Length (except Trig model)

16

INCH

Footing Area (except Trig model)

264.

SQ INCH

Spring (crown) Angle 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

DEFAULT VALUE

1/16

Standard

Standard

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— 33

(Cont’d)

(Cont’d)

PREFERENCE SETTINGS DEFAULT VALUE

Stairway Headroom

Rake-Wall

Arched Wall

Jack Rafters

Irregular Jack Spacing

Exponent

Meter Linear Display

Decimal Degree Display

Fractional Mode

6 feet 8 inch

Descending

Outside

Descending

OC-OC

Off

0.000

0.00°

Standard

*Depressing the Reset button located above the p key will also perform a Full Reset.

P

OCKET

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EFERENCE

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— 34

This equipment has been certified to comply with the limits for a Class B computing device, pursuant to

Subpart J of Part 15 of FCC rules.

Pocket Reference Guide copyrighted by

Calculated Industries, Inc. © 20 23 .

Construction Master

TM and Calculated Industries® are trademarks and registered trademarks of

Calculated Industries, Inc.

ALL RIGHTS RESERVED

CALCULATED INDUSTRIES®

4840 Hytech Drive

Carson City, NV 89706 U

SA

1-800-854-8075 or 1-775-885-4900

Fax: 1-775-885-4949

E-mail: [email protected]

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Designed in the U

SA

Printed in the Philippines

03/23

PRG4065E-

G