Calculated Industries 4050 Construction Master 5 Reference Guide
Calculated Industries 4050, the ultimate construction calculator, offers a range of capabilities to simplify your projects. Tackle dimensional problems, convert between units, calculate areas, volumes, and weights with ease. Master carpentry tasks like calculating board feet, stud numbers, and baluster spacing. Handle complex roof framing with functions for common, hip/valley, and jack rafters, irregular pitches, and rake walls. The stair layout key provides comprehensive solutions for stair design. Utilize the memory function, handle percent calculations, and find square roots effortlessly.
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C
ONSTRUCTION
M
ASTER ™
5
ADVANCED FEET-INCH-FRACTION CALCULATOR
Model 4050
Pocket Reference Guide
This f
Direction
Insert
C
ONSTRUCTION
M
ASTER TM
5
The Construction Master 5 calculator helps 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
— 1/2-1/64ths!
• Areas, Volumes and Weights
• Circle/Arc Calculations
• Common, Hip/Valley, Jack Rafter
Lengths (Regular and Irregular)
• Rake-Wall Solutions
• Concrete, Flooring Quantity
• Squaring-Up
• Stair Layout Solutions, and more!
Page 2
TABLE OF CONTENTS
GETTING STARTED...............................1
KEY DEFINITIONS/FUNCTIONS..........1
Basic Function Keys............................1
Dimension Keys...................................2
Arc/Circle Keys ....................................4
Right Triangle/Roof Framing Keys ......4
Stair Layout Key ..................................7
Stair Settings .......................................8
Miscellaneous Functions .....................8
PAPERLESS TAPE EXAMPLE ...........10
PREFERENCE SETTINGS .................11
ENTERING DIMENSIONS ..................13
Linear Dimensions.............................13
Square and Cubic Dimensions..........13
Linear Conversions............................14
Square and Cubic Conversions.........15
BASIC MATH OPERATIONS ..............15
EXAMPLES...........................................16
Adding and Subtracting Strings of
Dimensions.....................................16
Multiplying Dimensions......................16
Dividing Dimensions ..........................17
Percent Calculations..........................17
Square Area.......................................18
Rectangular Area and Volume...........18
Entering Square and Cubic and
Adding a Waste Allowance.............19
Weight Conversions ..........................19
Weight per Volume ............................20
Using the Memory .............................21
Board Feet and Cost .........................22
Carpentry — Calculating Number of Studs ..........................................22
Baluster Spacing................................23
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Circle Area and Circumference .........24
Arc Angle or Degree..........................24
Concrete Volume for Driveway..........25
Concrete Columns.............................25
Complex Concrete Volume................26
RIGHT ANGLE/FRAMING...................28
Squaring-Up a Foundation ................29
Pitch — Converting Roof Angle .........29
Converting Slope...............................30
Common Rafter Length .....................30
Regular Hip/Valley and Jack
Rafters............................................31
Irregular Hip/Valley ............................33
Rake-Wall — No Base .......................34
STAIRS................................................35
Stairs — Given Rise and Run ...........35
Stairs — Given Only the Floor-to-Floor
Rise; Entering Other Than 7-1/2 Inch
Desired Riser Height ......................37
APPENDIX ............................................38
Setting Fractional Resolution.............38
Default Settings .................................39
Auto Shut-Off.....................................39
Accuracy/Errors .................................40
Battery ...............................................41
Replacing the Battery ........................41
Reset .................................................41
AREA AND VOLUME FORMULAS .....42
REPAIR AND RETURN .......................44
WARRANTY ........................................45
FCC CLASS B.....................................47
LOOKING FOR NEW IDEAS ..............47
Page 4
GETTING STARTED
KEY DEFINITIONS / FUNCTIONS
Basic Function Keys
Arithmetic operation keys.
+ – x
÷ =
0
–
9 and
•
%
O o
Ç
√
Keys used for entering numbers.
Percent Key — Four-function (+, –, x, ÷) percent key.
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.
Square Root Key — Used to find the Square Root of a non-dimensional or area value.
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®
µ
Ç µ
Ç ®
® ®
Recall Key — Used with other keys to recall stored values and settings.
Memory Key — Adds the displayed value to Memory.
Clears when the calculator is shut off.
Memory Minus (M–) —
Subtracts the displayed value from Memory.
Memory Clear — Clears
Memory without changing current display.
Memory Clear — Clears
Memory and displays
Memory Total.
Dimension Keys y f
Yards Key — Enters or converts to Yards .
Feet Key — Enters or converts to Feet as whole or decimal numbers. Also used with the i and
/ keys for entering Feet-Inch values (e.g.,
6 f 9 i
1 / 2
). Repeated presses during conversions toggle between Fractional and
Decimal Feet.
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i
/ m c
M b
Inch Key — Enters or converts to Inches . Entry can be whole or decimal numbers. Also used with the
/ key for entering fractional inch values (e.g.,
9 i 1
/ 2
). Repeated presses during conversions toggle between Fractional and
Decimal Inches.
Fraction Bar Key — Used to enter Fractions . Fractions can 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 accuracy setting is automatically used.
Meters Key — Enters or converts to Meters .
Centimeters Key — Enters or converts to Centimeters .
Millimeters Key — Enters or converts to Millimeters .
Board Feet Key — Enters or converts Cubic values to
Board Feet. One Board
Foot is equal to 144 Cubic
Inches.
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w
Weight Key — Enters or converts (a volume value) to Tons, Pounds, Metric
Tons or Kilograms .
Repeated presses will cycle through these units.
Arc/Circle Keys
C
Ç C
Circle Key — Calculates
Circle Area and
Circumference based on entered Diameter.
Arc — Calculates Arc
Length or Degree based on entered Diameter and Arc
Degree or Length (e.g., if
Arc Degree is entered, it will calculate Arc Length, and vice versa).
Right Triangle/Roof Framing Keys p
Pitch Key — This key is used to enter or calculate the Pitch (Slope) of a roof
(or Right Triangle). Pitch is the amount of “Rise” over
12 Inches of “Run.” Pitch may be entered as:
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Ç p r
R d
H a Dimension an Angle
9 i p
3 0 p a Ratio
0 • 7 5 Ç p a Percentage
7 5 % p
A Pitch entry will remain in permanent storage until revised or reset. A solution will be replaced by its entered value once the calculator is cleared.
Enters Pitch Ratio (e.g.,
•
5 8 3 Ç p
).
Rise Key — Enters or calculates the Rise or vertical leg (height) of a Right
Triangle.
Run Key — Enters or calculates the Run or horizontal leg (base) of a Right
Triangle.
Diagonal Key — Enters or calculates the common or
Diagonal leg (Hypotenuse) of a Right Triangle. Typical applications are “squaring” slabs or finding common rafter lengths.
Hip/Valley Key —
Calculates length of the
Regular or Irregular Hip/
Valley rafter.
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Ç H j
Ç j
∑
Irregular Pitch — Enters
Irregular Pitch used to calculate lengths of the
Irregular Hip/Valley and
Jack rafters.
Jack Key — Calculates
Jack rafter lengths on the
Regular -pitched roof side.
Irregular Jack — Calculates
Jack rafter lengths on the
Irregular -pitched roof side.
Rake-Wall Key — Finds the stud sizes based on entered Right Triangle values and the stored On-
Center spacing. If a dimensional value is entered before pressing
∑
, that value is considered the base and will be added to the stud lengths.
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Stair Layout Key s
Stair Key — Given Rise and/or Run and entered/ stored variables, calculates or displays:
4
5
6
7
8
9
10
11
2
3
Press Result
1 Riser Height
Number of Risers
Riser Overage/
Underage
Tread Width
Number of Treads
Tread Overage/
Underage
Stringer Length
Angle of Incline
12
Stored Run
Stored Rise
Stored Desired
Riser Height
Stored Desired
Tread Width
STAIR DEFAULT VALUES
• 7-1/2” Desired Riser Height
• 10” Desired Tread Width
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Stair Settings
You may set “desired Riser height” and
“desired Tread width” to any value by using the following keys:
Ç 7
Riser Height — Stores a desired Riser height other than 7-1/2” (default) . For example, enter 8 Inches:
8 i Ç 7
.
Ç 9
Tread Width — Stores a desired Tread width other than 10” (default) . For example, enter 12 Inches:
1 2 i Ç 9
.
Miscellaneous Functions
B
Ç ÷
Ç x
Ç –
Ç +
Backspace Key — Used to delete entries one keystroke at a time (unlike the o function, which deletes the entire entry).
1/x — Finds the reciprocal of a number (e.g.,
8 Ç
÷
0.125).
Clear All — Returns all stored values to the default settings. (Does not affect
Preference Settings.)
(+/–) Toggle
Pi ( π ) 3.141593
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Ç √
Ç •
Ç 0
Ç 5 x 2 — Squares a linear or non-dimensional value.
Total Cost — Based on entry of per unit cost.
Store Weight per Volume
— Stores a new Weight per
Volume value as listed below:
Note: After entering a value and pressing
Ç 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 stored until you change it or perform a
Clear All (
Ç x
).
On-Center Spacing (o.c.)
— Stores a new on-center spacing (e.g.,
2 4 i
Ç 5
). The value is used for jack and rake wall stud calculations. Default is 16”.
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® =
Paperless Tape – Useful for checking figures, as it scrolls through your past 20 entries or calculations.
Press
® = to access
Paperless Tape mode.
Press
+ or
– to scroll forward or backward. Press
= to exit mode and continue with a new entry or calculation.
See example below.
PAPERLESS TAPE EXAMPLE
Add 6 Feet, 5 Feet and 4 Feet, then access the paperless tape mode and scroll back through your entries. Then, back up one entry, exit the tape mode and add 10
Feet to the total.
KEYSTROKE o o
6 f +
5 f +
4 f =
® =
+
+
+
–
=
+ 1 0 f =
DISPLAY
0.
6
FEET
0
INCH
11 FEET 0 INCH
15
FEET
0
INCH
TTL= 15 FEET 0 INCH
01 6
FEET
0
INCH
02 + 5 FEET 0 INCH
03 + 4
FEET
0
INCH
02 + 5 FEET 0 INCH
TTL= 15
FEET
0
INCH
25 FEET 0 INCH
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PREFERENCE SETTINGS
+
+
+
+
+
+
+
+
+
+
+
+
+
+
Press
Ç
, then
%
, then keep pressing
% to toggle through the main settings. Press the
+ key to advance within sub-setting.
Use the
– key to back up. Press o key to exit Preferences.
PRESS
Ç AND:
First press of
%
:
SETTING--FUNCTION
Fractional Resolution:
-1/16
-1/32
-1/64
-1/2
-1/4
-1/8
-1/16 (repeats options)
Second press of
%
: Area Displays:
-Std.
-0.
SQ FEET
-0.
SQ YD
-0.
SQ M
-Std.
(repeats options)
Third press of
%
: Volume Displays:
-Std.
-0.
CU YD
-0.
CU FEET
-0.
CU M
-Std.
(repeats options)
(Cont’d)
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(Cont’d)
PRESS :
Fourth press of
%
:
+
+
Fifth press of
%
:
SETTING--FUNCTION
Meter Linear Displays:
-0.000
M
-FLOAt M (floating point)
-0.000
M (repeats options)
+
+
Sixth press of
%
:
Decimal Degree Displays:
-0.00º
-FLOAt (floating point)
-0.00º (repeats options)
+
+
Fractional Mode:
-Std.
-COnSt
-Std.
(repeats options)
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ENTERING DIMENSIONS
Linear Dimensions
When entering Feet-Inch values, enter dimensions from largest to smallest —
Feet before Inches, Inches before
Fractions. Enter Fractions by entering the numerator (top number), pressing
/
(Fraction Bar key) and then the denominator (bottom number).
Note: If a denominator is not entered, the fractional setting value is used.
Examples of how linear dimensions are entered (press o after each entry):
DIMENSION
5 Yards
KEYSTROKES
5 Feet 1-1/2 Inch
5 f 1 i 1 / 2
17.5 Meters
5 y
1 7 • 5 m
Square and Cubic Dimensions
Examples of how Square and Cubic dimensions are entered (press o after each entry):
DIMENSION
5 Cubic Yards
KEYSTROKES
5 y y y
130 Square Feet
1 3 0 f f
33 Square Meters
3 3 m m
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Linear Conversions
Convert 10 Feet 6 Inches:
KEYSTROKE o o
1 0 f 6 i
Ç y
Ç i
Ç m
Ç c
Ç M
DISPLAY
0.
10 FEET 6 INCH
3.5
YD
126 INCH
3.200
M
320.04
CM
3200.4
MM
Convert 14 Feet 7-1/2 Inches to Decimal
Feet:
KEYSTROKE o o
DISPLAY
0.
1 4 f 7 i 1 / 2
14 FEET 7-1/2 INCH
Ç f
14.625
FEET
Convert 22.75 Feet to Feet-Inches:
KEYSTROKE o o
2 2 • 7 5 f
Ç f
DISPLAY
0.
22.75
FEET
22
FEET
9
INCH
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Square and Cubic Conversions
Convert 14 Square Feet to Square Yards:
KEYSTROKE o o
1 4 f f
Ç y
DISPLAY
0.
14
SQ FEET
1.555556
SQ YD
(1.6 square yards)
Convert 25 Square Yards to Square Feet:
KEYSTROKE o o
2 5 y y
Ç f
DISPLAY
0.
25 SQ YD
225.
SQ FEET
Convert 12 Cubic Feet to Cubic Yards:
KEYSTROKE o o
1 2 f f f
Ç y
DISPLAY
0.
12 CU FEET
0.444444
CU YD
BASIC MATH OPERATIONS
Your calculator uses standard chaining logic, which simply means that you enter your first value, the operator (
+
,
–
, x
,
÷
), the second value and then the Equals sign (
=
).
A.
3 + 2 =
5.
B.
3 – 2 =
1.
C.
3 x 2 =
6.
D.
3 ÷ 2 =
1.5
This feature also makes the calculator simple to use for dimensional applications.
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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 o o
DISPLAY
0.
6 f 2 i 1 / 2 +
6
FEET
2-1/2
INCH
1 1 f 5 i 1 / 4 +
17
FEET
7-3/4
INCH
1 8 • 2 5 i =
19 FEET 2 INCH
– 2 i 1 / 8 =
18
FEET
11-7/8
INCH
Multiplying Dimensions
What is the perimeter of a room with three walls which measure 15 Feet 3-3/4 Inches each?
KEYSTROKE DISPLAY
3 x 1 5 f 3 i 3 / 4 =
45 FEET 11-1/4 INCH
Multiply 5 Feet 3 Inches by 11 Feet 6-1/2
Inches:
KEYSTROKE DISPLAY
5 f 3 i x 1 1 f
6 i 1 / 2 =
60.59375
SQ FEET
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Dividing Dimensions
Divide 15 Feet 3-3/4 Inches into thirds
(divide by 3):
KEYSTROKE o o
DISPLAY
0.
1 5 f 3 i 3 / 4 ÷ 3 =
5 FEET 1-1/4 INCH
How many 3-Foot 6-Inch pieces can you cut from one 25-foot board?
KEYSTROKE o o
DISPLAY
0.
2 5 f ÷ 3 f 6 i =
7.142857
(or 7 whole pieces)
Percent Calculations
Add a 10% waste allowance to 2.78 Cubic
Yards:
KEYSTROKE o o
DISPLAY
0.
2 • 7 8 y y y + 1 0 %
3.058
CU YD
What is 25% of $1,575?
KEYSTROKE o o
1 5 7 5 x 2 5 %
DISPLAY
0.
393.75
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Square Area
Find the Area of a square room with sides measuring 15 Feet 8-1/2 Inches:
KEYSTROKE DISPLAY o o
1 5 f 8 i 1 / 2 Ç √
(x 2 )
0.
246.7517
SQ FEET
Rectangular Area and Volume
Find the Area and Volume:
• Length: 20 Feet 6-1/2 Inches
• Width: 12 Feet 8-1/2 Inches
• Height: 10 Inches
First, multiply the Length times the Width to find the Area. Then, multiply the Area times the Height to find the Volume:
KEYSTROKE o o
DISPLAY
0.
2 0 f 6 i 1 / 2 x
20 FEET 6-1/2 INCH
1 2 f 8 i 1 / 2 x
261.0503
SQ FEET
1 0 i =
8.057109
CU YD
Convert to Feet:
Ç f
217.542
CU FEET
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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 o o
DISPLAY
0.
5 5 f f + 1 0 %
60.5
SQ FEET
1 5 0 f f f + 2 0 %
180.
CU FEET
Weight Conversions
Convert 150 Pounds to other weights
(Tons, Metric Tons, Kilograms):
KEYSTROKE o o
1 5 0 w w
Ç w w w
*
DISPLAY
0.
150 LB
0.068039
MET Ton
68.03886
kG
0.075
Ton
*Calculator may not display Pounds upon first press of w ; it depends on which unit was accessed last. So press w until LB (or desired unit) is displayed, then convert.
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Weight per Volume
Convert 20 Cubic Yards of concrete to
Tons, Pounds, Metric Tons and Kilograms, if concrete weighs 1.5 Tons per Cubic Yard
(default value):
KEYSTROKE o o
2 0 y y y
Ç w w w w
DISPLAY
0.
20 CU YD
30.
Ton *
60000.
LB
27.21554
MET Ton
27215.54
kG
Now convert the above, if concrete weighs
2 Tons per Cubic Yard (store new Weight per Volume value):
KEYSTROKE
2 Ç 0
2 0 y y y
Ç w w w w
Ç x
STORED
DISPLAY
2.
Ton Per CU YD
20 CU YD
36287.39
kG *
40.
Ton
80000.
LB
36.28739
MET Ton
ALL CLEARED
(Clear stored Wt/Vol)
*Calculator will present values in a different order based on previous computation; simply continue to press w key until desired value is displayed.
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Using the Memory
Whenever the
µ key is pressed, the displayed value will be added to the
Memory. Other memory functions:
FUNCTION KEYSTROKES
Add to Memory
µ
Subtract from Memory
Ç µ
Recall total in Memory
® µ
Display/Clear Memory
® ®
Clear Memory
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.
Example:
KEYSTROKE
3 5 5 µ
2 5 5 µ
7 4 5 Ç µ
® µ
µ
µ
® ®
TTL
DISPLAY
M
M
+ 355.
+ 255.
M
- 745.
STORED
AVG
– 135.
– 45.
CNT
M
M
M
M
M
M
3.
M
+ – 135.
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Board Feet and Cost
Find the total Board Feet for the following boards: 2x4x16, 2x10x18 and 2x12x20.
What is the total cost at $275 per MBM*?
*Per thousand Board Foot measure
KEYSTROKE o o
DISPLAY
0.
2 x 4 x 1 6 b µ
BDFT 10.66667
M
2 x 1 0 x 1 8 b µ
BDFT 30.
2 x 1 2 x 2 0 b µ
® ® x 2 7 5 Ç •
BDFT 40.
M
M
BDFT 80.66667
$ 22.
18
Carpentry — Calculating Number of Studs
Find the number of 16-Inch On-Center studs needed for an 18 Feet 7-1/2 Inch wall.
KEYSTROKE
1. Divide Length by spacing: o o
÷ 1 6 i =
DISPLAY
0.
1 8 f 7 i 1 / 2
18 FEET 7-1/2 INCH
13.96875
(14 studs)
2. Add one for the end:
+ 1 =
14.96875
(15 studs)
Note: Also applies to trusses and joists.
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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?
KEYSTROKE DISPLAY
1. Estimate number of balusters in Span: o o
1 5 6 i ÷
5 i 1 / 2 =
*
0.
156 INCH
28.36364
(28 balusters)
*Desired spacing plus baluster width (4 Inches plus
1-1/2 Inch)
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 INCH
42 INCH
3. Find total space between all balusters:
1 5 6 i –
4 2 i =
156 INCH
114 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 INCH
3-15/16 INCH
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Circle Area and Circumference
Find the Area and Circumference of a
Circle with a Diameter of 25 Inches:
KEYSTROKE o o
2 5 i C
C
C
DISPLAY
0.
DIA 25 INCH
AREA 490.8739
SQ INCH
CIRC 78-9/16 INCH
Arc Angle or Degree
Find the Arc Angle (or Degree of Arc), given a 5-Foot Diameter and an Arc
Length of 3 Feet 3 Inches:
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KEYSTROKE DISPLAY
1. Enter Circle Diameter and Arc Length: o o
5 f C
3 f 3 i
0.
DIA 5 FEET 0 INCH
3 FEET 3 INCH
2. Find Degree of Arc:
Ç C
ARC 74.48°
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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 •
DISPLAY
0.
45
FEET
5
INCH
13 FEET 6 INCH
9.461806
CU YD
$ 615.
02
(total cost)
Concrete Columns
You’re going to pour five Columns, each of which has a Diameter of 3 Feet 4-1/2
Inches and a height of 11 Feet 6 Inches.
How many Cubic Yards of concrete will you need for all five Columns?
KEYSTROKE o o
DISPLAY
0.
1. Enter the Diameter of a Circle:
3 f 4 i 1 / 2 C
DIA 3 FEET 4-1/2 INCH
2. Find the Surface Area of a Circle:
C
AREA 8.946176
SQ FEET
3. Find Total Volume: x 1 1 f 6 i =
Ç y x 5 =
102.881
CU FEET
3.810408
CU YD
19.05204
CU YD
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Page 25
Complex Concrete Volume
You’re going to pour an odd-shaped patio
4-1/2 Inches deep with the dimensions shown below. First, calculate the total Area
(by dividing the drawing into three individual rectangles) and then determine the total
Yards of concrete required for this job.
27’ 0”
A
B
8’ 6”
C
9’ 0”
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Page 26
KEYSTROKE o o
DISPLAY
0.
1. Find Area of Part “A” and add to Memory:
3 8 f 2 i –
4 f 2 i = x 2 7 f =
µ
34 FEET 0 INCH
918.
SQ FEET
M+ 918.
SQ FEET M
2. Find Area of Part “B” and add to Memory:
4 f 2 i
4 FEET 2 INCH M x 8 f 6 i =
35.41667
SQ FEET
µ
M+ 35.41667
SQ FEET
M
M
3. Find Area of Part “C” and add to Memory:
9 f
9 FEET x 9 f 6 i =
85.5
SQ FEET
µ
M+ 85.5
SQ FEET
M
M
M
4. Recall and Clear Total Area Stored in
Memory:
® ®
M+ 1038.917
SQ FEET
5. Find Total Cubic Yards: x 4 i 1 / 2 =
14.4294
CU YD
Page 27
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RIGHT ANGLE / FRAMING
The top row of keys provide you with builtin solutions to Right Triangles. The solutions are available in any of the linear dimensions offered on the calculator. Thus, you can solve Right Triangles directly in
Feet and Inches, Decimal Feet, Meters, etc.
Any value of a Right Triangle can be found given two of the four variables:
1) Rise, 2) Run, 3) Diagonal or 4) Pitch.
Page 28
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Squaring-Up a Foundation
Square-Up
(Diagonal)
15’ 6”
Square-Up 15 Feet 6 Inch (Run) x 10 Feet
2 Inch (Rise):
KEYSTROKE o o
DISPLAY
0.
1 5 f 6 i R
RUN 15 FEET 6 INCH
1 0 f 2 i r
RISE 10 FEET 2 INCH d
DIAG 18 FEET 6-7/16 INCH
Pitch — Converting Roof Angle
Find the % Grade, Pitch Ratio/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
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Page 29
Converting Slope
Find the Pitch in Inches, Pitch Degrees, and Percent Grade if the Pitch Ratio/Slope is 0.625:
KEYSTROKE o o
• 6 2 5 Ç p p p p
DISPLAY
0.
SLP 0.625
PTCH 7-1/2 INCH
PTCH 32.01°
%GRD 62.5
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:
KEYSTROKE o o
DISPLAY
0.
1. Enter Pitch:
7 i p
3. Find the Rise: r
PTCH 7 INCH
2. Enter half the Span as the Run:
2 8 f ÷ 2 =
R
14 FEET 0 INCH
RUN 14 FEET 0 INCH
RISE 8 FEET 2 INCH
4. Find the Length of the Common rafter: d
DIAG 16 FEET 2-1/2 INCH
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Page 30
Regular Hip/Valley and Jack Rafters
Page 31
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
(Jack rafters at 16 Inch On-Center spacing):
KEYSTROKE
1. Find the Common rafter length: o o
6 f R
DISPLAY
0.
RUN 6 FEET 0 INCH
9 i p
PTCH 9 INCH d
(Common) DIAG 7 FEET 6 INCH
(Cont’d)
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(Cont’d)
KEYSTROKE DISPLAY
2. Find the Hip/Valley rafter and Jack rafter lengths:
H j
H/V 9 FEET 7-1/4 INCH
JKOC
STORED j j j j j
16 INCH *
JK 1 5 FEET 10 INCH
JK 2 4 FEET 2 INCH
JK 3 2 FEET 6 INCH
JK 4 0 FEET 10 INCH
JK 5 0 FEET 0 INCH
*Uses standard (default) 16-Inch On-Center. To enter a new On-Center (e.g., 18 Inches) press
1 8 i Ç 5
. Press
® 5 to review stored value. This value will remain stored until you re-enter a new value or perform a Clear All
(
Ç x
) .
Page 32
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Irregular Hip/Valley
You’re working with a 7/12 Pitch and half of your overall Span is 15 Feet 7 Inches.
The Irregular Pitch is 8/12. Find the
Common rafter length, Irregular Hip/Valley and Jack rafter lengths.
KEYSTROKE o o
DISPLAY
0.
1. Find Common Rafter Length:
7 i p
PTCH 7 INCH
1 5 f 7 i R
RUN 15 FEET 7 INCH d
DIAG 18 FEET 0-1/2 INCH
2. Find Irregular Hip Rafter Length:
8 i Ç H
H
IPCH 8 INCH
IH/V 22 FEET 7-3/8 INCH
3. Find Irregular Jack Lengths:
Ç j j
* j j j j
IJOC
STORED
16
INCH
IJ 1 14 FEET 11-13/16 INCH
IJ 2 13
FEET
7
INCH
IJ 3 12 FEET 2-3/16 INCH
IJ 4 10
FEET
9-3/8
INCH
IJ 5 9 FEET 4-1/2 INCH
Etc... Continue pressing j until last regular
Jack or “0.” is reached.
* It is not necessary to keep pressing Ç when displaying the Irregular Jack sizes.
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Page 33
Rake-Wall — No Base
Find each stud size in a Rake-Wall with a peak of 3 Feet 6 Inches and a length of 6
Feet. Use 16 Inches as your spacing
(default):
KEYSTROKE
1. Enter Rise and Run:
DISPLAY o o
0.
3 f 6 i r
RISE 3 FEET 6 INCH
6 f R
RUN 6 FEET 0 INCH
2. Find Stud Lengths:
∑
∑
RWOC
STORED
16 INCH
RW 1 2 FEET 8-11/16 INCH
∑
∑
∑
∑
RW 2 1 FEET 11-5/16 INCH
RW 3 1 FEET 2 INCH
RW 4 0 FEET 4-11/16 INCH
BASE 0 FEET 0 INCH
3. Find Rake-Wall Angle of Incline:
∑
RW 30.26°
Note: To enter a base, enter the base height prior to pressing the
∑ key ( e.g.,
5 f ∑
).
Page 34
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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
1. Enter Rise and Run: o o
DISPLAY
0.
1 0 f 1 i r
RISE 10 FEET 1 INCH
1 2 f 5 i R
RUN 12 FEET 5 INCH
(Cont’d)
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Page 35
(Cont’d)
KEYSTROKE DISPLAY
2. Recall stored 7-1/2 Inch desired Riser
Height and find stair values:
® s s s s s s s s s
R-HT
R-HT
STORED
7-1/2 INCH
7-9/16 INCH *
RSRS 16.
R+/– 0 INCH
T-WD 9-15/16 INCH *
TRDS 15.
T+/– 0-1/16 INCH
STRG 15 FEET 7-5/16 INCH
INCL 37.27°
*A in the display means the calculated Riser
Height or Tread Width is greater than the stored desired Riser Height or Tread Width.
Page 36
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Stairs — Given Only the Floor-to-Floor
Rise; Entering Other Than 7-1/2 Inch
Desired Riser Height
Find stair values if the Floor-to-Floor Rise is 12 Feet 6 Inches, and the desired Riser
Height is 8 Inches:
KEYSTROKE DISPLAY
1. Enter desired Riser Height and Floor-to-
Floor Rise: o o
8 i Ç 7
R-HT
1 2 f 6 i r
STORED
0.
8 INCH
RISE 12 FEET 6 INCH
2. Calculate stair values: s s s s
R-HT 7-7/8
INCH
RSRS 19.
R+/– – 0-3/8
INCH
T-WD
STORED s s s s s s s s
10 INCH
TRDS 18.
T+/– 0 INCH
STRG 19
FEET
1-1/8
INCH
INCL 38.22°
RUN 15
FEET
0
INCH
*
RISE
STORED
R-HT
T-WD
12 FEET 6 INCH
STORED
STORED
8
INCH
10 INCH
*Note: Run is calculated based on Tread values, as it was not entered. The Total Run of a stairway is equal to the width of each Tread multiplied by the number of Treads.
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Page 37
APPENDIX
Setting Fractional Resolution
Fractional resolution is pemanently set via the Preference Settings (see Preference
Settings section for instructions). To select other formats temporarily (e.g., 1/64ths,
1/32nds, etc.), see the example below:
Add 44/64th to 1/64th of an inch and then convert the answer to other fractional resolutions:
KEYSTROKE DISPLAY 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
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: Changing the Fractional Resolution on a displayed value does not alter your Permanent
Fractional Resolution Setting. Pressing o will return your calculator to the permanently set fractional resolution.
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Page 38
Default Settings
After a Clear All (
Ç x
), your calculator will return to the following settings:
STORED VALUES
Stair Riser Height
Stair Tread Width
On-Center Spacing
Weight per Volume
DEFAULT VALUE
7-1/2 Inch
10 Inch
16 Inch
1.5 Tons/Cu Yd
If you replace your battery 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
Meter Linear Display
Decimal Degree Display
Fractional Mode
DEFAULT VALUE
1/16
Standard
Standard
0.000
0.00°
Standard
*Depressing the Reset button located above the p key will also perform a Full Reset.
Auto Shut-Off
Your calculator will shut itself off after about 8-12 minutes of non-use.
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Page 39
Accuracy/Errors
Accuracy/Display Capacity —
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
0FL0
DIV Error
DIM Error
ENT Error
None
ERROR TYPE
Overflow (too large to display)
Divide by 0
Dimension error
Entry error
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 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.
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Page 40
Battery
This model uses one (1) CR2016 battery
(included). Should your calculator display become very dim or erratic, replace the battery.
Note: Please use caution when disposing of your old battery, as it contains hazardous chemicals.
Replacement battery is available at most discount or electronics stores. You may also call Calculated Industries at
1-775-885-4900.
Replacing the Battery
While the calculator is off, turn the calculator over and use a #1 Phillips screwdriver to remove the battery holder screw located near the center at the top. With the screw removed, pull battery holder out, remove old battery, and slide new battery into holder. The negative side of the battery should be facing you as you insert the battery holder into the calculator. Replace screw using a #1 Phillips screwdriver.
Reset
If your calculator should ever “lock up,” press Reset — a small hole located above the p key — to perform a total reset.
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Page 41
AREA AND VOLUME FORMULAS
Area Formulas
Page 42
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Volume Formulas
Page 43
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REPAIR AND RETURN
Warranty, Repair and Return
Information
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 battery 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 7 :00am to 4:00pm Pacific
Time for additional information and a
Return Authorization (RA) number .
Call Toll Free: 1-800-854-8075
Outside USA: 1-775-885-4900 www.calculated.com/warranty
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Page 44
WARRANTY
Warranty Repair Service – USA
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 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
ACCIDENT, IMPROPER HANDLING OR OPERATION,
OR IF UNAUTHORIZED REPAIRS ARE ATTEMPTED
OR MADE.
SOME EXAMPLES OF DAMAGES NOT
NOT
LIMITED TO, BATTERY LEAKAGE, BENDING, A
“BLACK INK SPOT” OR VISIBLE CRACKING OF THE
LCD, WHICH ARE PRESUMED TO BE DAMAGES
To obtain warranty service in the U.S., please go to the
A repaired or replacement product assumes the remaining warranty of the original product or 90 days, whichever is longer.
Non-Warranty Repair Service – USA
Non-warranty repair covers service beyond the warranty period, that are less than 5 years old and which have not been damaged due to misuse or abuse.
Contact Calculated Industries at 1-775-885-4900 to obtain current product repair information and required RA number. Repairs are guaranteed for 90 days.
Repair Service – Outside the USA
To obtain warranty or non-warranty repair service for goods purchased outside the U.S., contact the dealer 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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Page 45
Disclaimer
CI MAKES NO WARRANTY OR REPRESENTATION,
EITHER EXPRESS OR IMPLIED, WITH RESPECT TO
THE PRODUCT’S QUALITY, PERFORMANCE, MER-
CHANTABILITY, OR FITNESS FOR A PARTICULAR
PURPOSE. AS A RESULT, THIS PRODUCT, INCLU-
DING BUT NOT LIMITED TO, KEYSTROKE PROCE-
DURES, MATHEMATICAL ACCURACY AND PREPRO-
GRAMMED MATERIAL, IS SOLD “AS IS,” AND YOU
THE PURCHASER ASSUME THE ENTIRE RISK AS TO
ITS QUALITY AND PERFORMANCE.
IN NO EVENT WILL CI BE LIABLE FOR DIRECT, INDI-
RECT, 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, 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.
Page 46
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FCC CLASS B
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.
LOOKING FOR NEW IDEAS
Calculated Industries, a leading manufacturer of special-function calculators and digital measuring instruments, is always interested in new product ideas in these areas.
If you have a new product idea, please visit our “Bright Idea” page at www.calculated.com/brightidea.asp. For suggestions about improving this product or other products, please visit us at www.calculated.com under “Contact Us”.
Thank You.
Page 47
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Page48
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 trad e marks and registered trademarks of
Calculated Industries, Inc.
ALL RIGHTS RESERVED
CALCULATED INDUSTRIES®
4840 Hytech Drive
Carson City, NV 89706 USA
1800-854-8075 Fax: 1-775-885-4949
Email: [email protected]
www.calculated.com
Designed in the USA
Printed in the Philippines
03/23
PRG4050EH
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