# Calculated Industries | Construction Master III | User`s Guide

CONSTRUCTION MASTER® 5
v3.1
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
• Roofing Materials
• Squaring-Up
• Stair Layout Solutions, and more!
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
Dimensions.....................................16
Multiplying Dimensions......................16
Dividing Dimensions ..........................17
Percent Calculations..........................17
Square Area.......................................18
Rectangular Area and Volume...........18
Entering Square and Cubic and
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
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
GETTING STARTED
KEY DEFINITIONS / FUNCTIONS
Basic Function Keys
+–x
÷=
Arithmetic operation keys.
0–9
and •
Keys used for entering
numbers.
%
Percent Key — Four-function (+, –, x, ÷) percent key.
O
Off Key — Turns all power
off, clearing all non-permanent registers.
o
On/Clear Key — Turns on
power. Pressing once clears
the display. Pressing twice
clears all temporary values.
Ç
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.
Ç√
x2 Function — Finds the
Square of a linear or nondimensional value.
POCKET REFERENCE GUIDE — 1
®
Recall Key — Used with
other keys to recall stored
values and settings.
µ
displayed value to Memory.
Clears when the calculator
is shut off.
Çµ
Memory Minus (M–) —
Subtracts the displayed
value from Memory.
Ç®
Memory Clear — Clears
Memory without changing
current display.
®®
Memory Clear — Clears
Memory and displays
Memory Total.
Dimension Keys
y
Yards Key — Enters or
converts to Yards.
f
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.
POCKET REFERENCE GUIDE — 2
i
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.
m
Meters Key — Enters or
converts to Meters.
c
Centimeters Key — Enters
or converts to Centimeters.
M
Millimeters Key — Enters
or converts to Millimeters.
b
Board Feet Key — Enters
or converts Cubic values to
Board Feet. One Board
Foot is equal to 144 Cubic
Inches.
POCKET REFERENCE GUIDE — 3
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
Circle Key — Calculates
Circle Area and
Circumference based on
entered Diameter.
ÇC
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:
POCKET REFERENCE GUIDE — 4
a Dimension
9ip
an Angle
30p
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.
Çp
Enters Pitch Ratio (e.g., •
5 8 3 Ç p).
r
Rise Key — Enters or calculates the Rise or vertical
leg (height) of a Right
Triangle.
R
Run Key — Enters or calculates the Run or horizontal leg (base) of a Right
Triangle.
d
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.
H
Hip/Valley Key —
Calculates length of the
Regular or Irregular Hip/
Valley rafter.
POCKET REFERENCE GUIDE — 5
ÇH
Irregular Pitch — Enters
Irregular Pitch used to calculate lengths of the
Irregular Hip/Valley and
Jack rafters.
j
Jack Key — Calculates
Jack rafter lengths on the
Regular-pitched roof side.
Çj
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 OnCenter spacing. If a dimensional value is entered
before pressing ∑, that
value is considered the
base and will be added to
the stud lengths.
POCKET REFERENCE GUIDE — 6
Stair Layout Key
s
Stair Key — Given Rise
and/or Run and entered/
stored variables, calculates
or displays:
Press
1
2
3
4
5
6
7
8
9
10
11
12
Result
Riser Height
Number of Risers
Riser Overage/
Underage
Underage
Stringer Length
Angle of Incline
Stored Run
Stored Rise
Stored Desired
Riser Height
Stored Desired
STAIR DEFAULT VALUES
• 7-1/2” Desired Riser Height
POCKET REFERENCE GUIDE — 7
Stair Settings
You may set “desired Riser height” and
“desired Tread width” to any value by
using the following keys:
Ç7
Riser Height — Stores a
desired Riser height other
than 7-1/2” (default). For
example, enter 8 Inches:
8 i Ç 7.
Ç9
than 10” (default). For
example, enter 12 Inches:
1 2 i Ç 9.
Miscellaneous Functions
B
Backspace Key — Used
to delete entries one keystroke at a time (unlike the
o function, which deletes
the entire entry).
Ç÷
1/x — Finds the reciprocal
of a number (e.g., 8 Ç
÷ 0.125).
Çx
Clear All — Returns all
stored values to the default
settings. (Does not affect
Preference Settings.)
Ç–
(+/–) Toggle
Ç+
Pi (π) 3.141593
POCKET REFERENCE GUIDE — 8
Ç√
x 2 — Squares the value in
the display.
√
Square Root Key — Used
to find the Square Root of a
non-dimensional or area
value.
Ç•
Total Cost — Based on
entry of per unit cost.
Ç0
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).
Ç5
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”.
POCKET REFERENCE GUIDE — 9
®=
Paperless Tape – Useful
for checking figures, as it
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
oo
6f+
5f+
4f=
®=
+
+
+
–
=
+10f=
DISPLAY
0.
6
11
15
TTL= 15
01 6
02 + 5
03 + 4
02 + 5
TTL= 15
25
FEET
FEET
FEET
FEET
FEET
FEET
FEET
FEET
FEET
FEET
POCKET REFERENCE GUIDE — 10
0
0
0
0
0
0
0
0
0
0
INCH
INCH
INCH
INCH
INCH
INCH
INCH
INCH
INCH
INCH
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
Area Displays:
of %:
--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)
POCKET REFERENCE GUIDE — 11
(Cont’d)
PRESS :
SETTING--FUNCTION
Fourth press
of %:
+
+
Fifth press
of %:
+
+
Sixth press
of %:
+
+
Meter Linear Displays:
--0.000 M
--FLOAt M (floating point)
--0.000 M (repeats options)
Decimal Degree Displays:
--0.00º
--FLOAt (floating point)
--0.00º (repeats options)
Fractional Mode:
--Std.
--COnSt
--Std. (repeats options)
POCKET REFERENCE GUIDE — 12
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
KEYSTROKES
5 Yards
5y
5 Feet 1-1/2 Inch 5 f 1 i 1 / 2
17.5 Meters
17•5m
Square and Cubic Dimensions
Examples of how Square and Cubic
dimensions are entered (press o after
each entry):
DIMENSION
KEYSTROKES
5 Cubic Yards
5yyy
130 Square Feet 1 3 0 f f
33 Square Meters 3 3 m m
POCKET REFERENCE GUIDE — 13
Linear Conversions
Convert 10 Feet 6 Inches:
KEYSTROKE
oo
10f6i
Çy
Çi
Çm
Çc
ÇM
DISPLAY
10
0.
6 INCH
3.5 YD
126 INCH
3.200 M
320.04 CM
3200.4 MM
FEET
Convert 14 Feet 7-1/2 Inches to Decimal
Feet:
KEYSTROKE
DISPLAY
oo
0.
14f7i1/2
14 FEET 7-1/2 INCH
Çf
14.625 FEET
Convert 22.75 Feet to Feet-Inches:
KEYSTROKE
oo
22•75f
Çf
DISPLAY
0.
22.75 FEET
22 FEET 9 INCH
POCKET REFERENCE GUIDE — 14
Square and Cubic Conversions
Convert 14 Square Feet to Square Yards:
KEYSTROKE
DISPLAY
oo
14ff
Çy
0.
14 SQ FEET
1.555556 SQ YD
(1.6 square yards)
Convert 25 Square Yards to Square Feet:
KEYSTROKE
DISPLAY
oo
25yy
Çf
0.
25 SQ YD
225. SQ FEET
Convert 12 Cubic Feet to Cubic Yards:
KEYSTROKE
DISPLAY
oo
12fff
Çy
0.
12 CU FEET
0.444444 CU YD
BASIC MATH OPERATIONS
logic, which simply means that you enter
your first value, the operator (+, –, x,
÷), the second value and then the Equals
sign (=).
A.
B.
C.
D.
3
3
3
3
+
–
x
÷
2
2
2
2
=
=
=
=
5.
1.
6.
1.5
This feature also makes the calculator simple to use for dimensional applications.
POCKET REFERENCE GUIDE — 15
EXAMPLES
Dimensions
• 6 Feet 2-1/2 Inches
• 11 Feet 5-1/4 Inches
• 18.25 Inches
Then subtract 2-1/8 Inches:
KEYSTROKE
DISPLAY
oo
6f2i1/2+
6 FEET 2-1/2
11f5i1/4+
17 FEET 7-3/4
18•25i=
19 FEET 2
– 2 i 1 / 8 = 18 FEET 11-7/8
0.
INCH
INCH
INCH
INCH
Multiplying Dimensions
What is the perimeter of a room with three
walls which measure 15 Feet 3-3/4 Inches
each?
KEYSTROKE
DISPLAY
3x15f3i3/4=
45 FEET 11-1/4
INCH
Multiply 5 Feet 3 Inches by 11 Feet 6-1/2
Inches:
KEYSTROKE
DISPLAY
5f3ix11f
6i1/2=
60.59375
SQ FEET
POCKET REFERENCE GUIDE — 16
Dividing Dimensions
Divide 15 Feet 3-3/4 Inches into thirds
(divide by 3):
KEYSTROKE
DISPLAY
oo
15f3i3/4÷3=
5 FEET 1-1/4
0.
INCH
How many 3-Foot 6-Inch pieces can you
cut from one 25-foot board?
KEYSTROKE
DISPLAY
oo
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
DISPLAY
oo
0.
2•78yyy+10%
3.058 CU YD
What is 25% of \$1,575?
KEYSTROKE
DISPLAY
oo
1575x25%
0.
393.75
POCKET REFERENCE GUIDE — 17
Square Area
Find the Area of a square room with sides
measuring 15 Feet 8-1/2 Inches:
KEYSTROKE
DISPLAY
oo
0.
1 5 f 8 i 1 / 2 Ç √ (x 2)
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
DISPLAY
oo
0.
20f6i1/2x
20 FEET 6-1/2 INCH
12f8i1/2x
261.0503 SQ FEET
10i=
8.057109 CU YD
Convert to Feet:
Çf
217.542
CU FEET
POCKET REFERENCE GUIDE — 18
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
oo
5 5 f f + 1 0 % 60.5 SQ
150fff+20%
180. CU
0.
FEET
FEET
Weight Conversions
Convert 150 Pounds to other weights
(Tons, Metric Tons, Kilograms):
KEYSTROKE
oo
1 5 0 w w*
Çw
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.
POCKET REFERENCE GUIDE — 19
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
DISPLAY
oo
20yyy
Çw
w
w
w
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
2Ç0
20yyy
Çw
w
w
w
Çx
DISPLAY
STORED
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.
POCKET REFERENCE GUIDE — 20
Using the Memory
Whenever the µ key is pressed, the
displayed value will be added to the
Memory. Other memory functions:
FUNCTION
KEYSTROKES
Subtract from Memory
Recall total in Memory
Display/Clear Memory
Clear Memory
µ
Ç
®
®
Ç
µ
µ
®
®
Memory is semi-permanent, clearing only
when you:
1)
2)
3)
4)
turn off the calculator;
press ® ®;
press Ç ®;
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
355µ
255µ
745Çµ
®µ
µ
µ
®®
DISPLAY
355. M
255. M
745. M
STORED
– 135. M
AVG – 45. M
CNT 3. M
M+ – 135.
M+
M+
M-
TTL
POCKET REFERENCE GUIDE — 21
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
DISPLAY
oo
0.
2x4x16bµ
BDFT 10.66667 M
2x10x18bµ
BDFT 30. M
2x12x20bµ
BDFT 40. M
®®
BDFT 80.66667
x275Ç•
\$ 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
DISPLAY
1. Divide Length by spacing:
oo
0.
18f7i1/2
18 FEET 7-1/2 INCH
÷16i=
13.96875
(14 studs)
2. Add one for the end:
+1=
14.96875
(15 studs)
Note: Also applies to trusses and joists.
POCKET REFERENCE GUIDE — 22
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:
oo
0.
156i÷
156 INCH
5 i 1 / 2 =*
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):
1i1/2x
1-1/2 INCH
28=
42 INCH
3. Find total space between all balusters:
156i–
156 INCH
42i=
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):
114i÷
114 INCH
29=
3-15/16 INCH
POCKET REFERENCE GUIDE — 23
Circle Area and Circumference
Find the Area and Circumference of a
Circle with a Diameter of 25 Inches:
KEYSTROKE
oo
25iC
C
C
DISPLAY
0.
DIA 25
AREA 490.8739 SQ
CIRC 78-9/16
INCH
INCH
INCH
Arc Angle or Degree
Dgm-ARC-102
Find the Arc Angle (or Degree of Arc),
given a 5-Foot Diameter and an Arc
Length of 3 Feet 3 Inches:
KEYSTROKE
DISPLAY
1. Enter Circle Diameter and Arc Length:
oo
0.
5fC
DIA 5 FEET 0 INCH
3f3i
3 FEET 3 INCH
2. Find Degree of Arc:
ÇC
ARC 74.48°
POCKET REFERENCE GUIDE — 24
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
oo
45f5i
x13f6i
x5i=
x65Ç•
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
DISPLAY
oo
0.
1. Enter the Diameter of a Circle:
3f4i1/2C
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:
x11f6i=
102.881 CU FEET
Çy
3.810408 CU YD
x5=
19.05204 CU YD
POCKET REFERENCE GUIDE — 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”
9’ 6”
B
4’ 2”
38’ 2”
A
C
8’ 6”
Dgm-CCV-103
9’ 0”
POCKET REFERENCE GUIDE — 26
KEYSTROKE
DISPLAY
oo
0.
1. Find Area of Part “A” and add to Memory:
38f2i–
4f2i=
34 FEET 0 INCH
x27f=
918. SQ FEET
µ
M+ 918. SQ FEET M
2. Find Area of Part “B” and add to Memory:
4f2i
4 FEET 2 INCH M
x8f6i=
35.41667 SQ FEET M
µ
M+ 35.41667 SQ FEET M
3. Find Area of Part “C” and add to Memory:
9f
9 FEET M
x 9 f 6 i = 85.5 SQ FEET M
µ
M+ 85.5 SQ FEET 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
POCKET REFERENCE GUIDE — 27
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:
Dgm-RAF-104
1) Rise, 2) Run, 3) Diagonal or 4) Pitch.
POCKET REFERENCE GUIDE — 28
Squaring-Up a Foundation
al)
on
10’ 2”
iag
U
re-
ua
Dgm-SUD-105
Sq
D
p(
15’ 6”
Square-Up 15 Feet 6 Inch (Run) x 10 Feet
2 Inch (Rise):
KEYSTROKE
DISPLAY
oo
15f6iR
RUN 15 FEET 6
10f2ir
RISE 10 FEET 2
d
DIAG 18 FEET 6-7/16
0.
INCH
INCH
INCH
Pitch — Converting Roof Angle
Find the % Grade, Pitch Ratio/Slope and
Pitch in Inches if the roof angle is 30.25°:
KEYSTROKE
oo
30•25p
p
p
p
DISPLAY
0.
PTCH 30.25°
%GRD 58.31828
SLP 0.583183
PTCH 7 INCH
POCKET REFERENCE GUIDE — 29
Converting Slope
Find the Pitch in Inches, Pitch Degrees,
and Percent Grade if the Pitch Ratio/Slope
is 0.625:
KEYSTROKE
oo
•625Çp
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
DISPLAY
oo
1. Enter Pitch:
7ip
0.
PTCH 7
INCH
2. Enter half the Span as the Run:
28f÷2=
14 FEET 0 INCH
R
RUN 14 FEET 0 INCH
3. Find the Rise:
r
RISE 8
FEET
2
INCH
4. Find the Length of the Common rafter:
d
DIAG 16 FEET 2-1/2 INCH
POCKET REFERENCE GUIDE — 30
Dgm-Raft-106
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
(Jack rafters at 16 Inch On-Center
spacing):
KEYSTROKE
DISPLAY
1. Find the Common rafter length:
oo
0.
6fR
RUN 6 FEET 0 INCH
9ip
PTCH 9 INCH
d (Common)
DIAG 7 FEET 6 INCH
(Cont’d)
POCKET REFERENCE GUIDE — 31
(Cont’d)
KEYSTROKE
DISPLAY
2. Find the Hip/Valley rafter and Jack
rafter lengths:
H
H/V 9 FEET 7-1/4 INCH
j
JKOC STORED 16 INCH*
j
JK 1 5 FEET 10 INCH
j
JK 2 4 FEET 2 INCH
j
JK 3 2 FEET 6 INCH
j
JK 4 0 FEET 10 INCH
j
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).
POCKET REFERENCE GUIDE — 32
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
DISPLAY
oo
0.
1. Find Common Rafter Length:
7ip
PTCH 7 INCH
15f7iR
RUN 15 FEET 7 INCH
d
DIAG 18 FEET 0-1/2 INCH
2. Find Irregular Hip Rafter Length:
8iÇH
IPCH 8 INCH
H
IH/V 22 FEET 7-3/8 INCH
3. Find Irregular Jack Lengths:
Çj
IJOC STORED 16 INCH
j*
IJ1 14 FEET 11-13/16 INCH
j
IJ2 13 FEET 7 INCH
j
IJ3 12 FEET 2-3/16 INCH
j
IJ4 10 FEET 9-3/8 INCH
j
IJ5 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.
POCKET REFERENCE GUIDE — 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
DISPLAY
1. Enter Rise and Run:
oo
0.
3 f 6 i r RISE 3 FEET 6 INCH
6fR
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 ∑).
POCKET REFERENCE GUIDE — 34
Dgm-Stairs-107
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:
oo
0.
10f1ir
RISE 10 FEET 1 INCH
12f5iR
RUN 12 FEET 5 INCH
(Cont’d)
POCKET REFERENCE GUIDE — 35
(Cont’d)
KEYSTROKE
DISPLAY
2. Recall stored 7-1/2 Inch desired Riser
Height and find stair values:
®s
R-HT STORED 7-1/2 INCH
s
R-HT
7-9/16 INCH*
s
RSRS 16.
s
R+/– 0 INCH
s
T-WD
9-15/16 INCH*
s
TRDS 15.
s
T+/– 0-1/16 INCH
s
STRG 15 FEET 7-5/16 INCH
s
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.
POCKET REFERENCE GUIDE — 36
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-toFloor Rise:
oo
0.
8iÇ7
R-HT STORED 8 INCH
12f6ir
RISE 12 FEET 6 INCH
2. Calculate stair values:
s
R-HT 7-7/8 INCH
s
RSRS 19.
s
R+/– – 0-3/8 INCH
s
T-WD STORED 10 INCH
s
TRDS 18.
s
T+/– 0 INCH
s
STRG 19 FEET 1-1/8 INCH
s
INCL 38.22°
s
RUN 15 FEET 0 INCH*
s
RISE STORED 12 FEET 6 INCH
s
R-HT STORED 8 INCH
s
T-WD STORED 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.
POCKET REFERENCE GUIDE — 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
oo
44/64
+1/64=
Ç 1 (1/16)
Ç 2 (1/2)
Ç 3 (1/32)
Ç 4 (1/4)
Ç 6 (1/64)
Ç 8 (1/8)
oo
DISPLAY
0.
0-44/64
0-45/64
0-11/16
0-1/2
0-23/32
0-3/4
0-45/64
0-3/4
INCH
INCH
INCH
INCH
INCH
INCH
INCH
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.
POCKET REFERENCE GUIDE — 38
Default Settings
After a Clear All (Ç x), your calculator
STORED VALUES
Stair Riser Height
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 batteries or perform a
Full Reset* (press O, hold down x, and
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
POCKET REFERENCE GUIDE — 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
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
ERROR TYPE
0FL0
Overflow (too large to
display)
DIV Error
Divide by 0
DIM Error
Dimension error
ENT Error
Entry error
None
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.
POCKET REFERENCE GUIDE — 40
Battery
This model uses one (1) CR2016 battery
become very dim or erratic, replace the
battery.
Note: Please use caution when disposing of your
old batteries, as they contain hazardous chemicals.
Replacement batteries are available at
most discount or electronics stores. You
may also call Calculated Industries at
1-775-885-4900.
Replacing the Battery
Turn the calculator over and open user
guide door located at the top. Pull battery
holder out (top left corner) and turn over.
Remove old battery and slide new battery
under tabs. Turn holder over (negative side
facing you) and insert into calculator.
Reset
If your calculator should ever “lock up,”
press Reset — a small hole located above
the p key — to perform a total reset.
POCKET REFERENCE GUIDE — 41
AREA AND VOLUME FORMULAS
Dgm-AF-100
Area Formulas
POCKET REFERENCE GUIDE — 42
Dgm-VF-101
Volume Formulas
POCKET REFERENCE GUIDE — 43
REPAIR AND RETURN
Warranty, Repair and Return
Information
Return Guidelines
1.
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
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
POCKET REFERENCE GUIDE — 44
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 WARRANTY 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 on the
back cover 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.
POCKET REFERENCE GUIDE — 45
Disclaimer
CI MAKES NO WARRANTY OR REPRESENTATION,
EITHER EXPRESS OR IMPLIED, WITH RESPECT TO
THE PRODUCT’S QUALITY, PERFORMANCE, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR
PURPOSE. AS A RESULT, THIS PRODUCT, INCLUDING BUT NOT LIMITED TO, KEYSTROKE PROCEDURES, MATHEMATICAL ACCURACY AND PREPROGRAMMED 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, 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
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.
POCKET REFERENCE GUIDE — 46
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
looking for new product ideas in these
areas.
If you have an idea, or a suggestion for
improving this product or User's Guide,