Calculated Industries 4065-2140 User manual

®

C

ONSTRUCTION

M

ASTER

P

RO

Pocket Reference Guide

For Models:

4065 v3.1 Construction Master Pro

4080 v3.1 Construction Master Pro Trig

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CONSTRUCTION MASTER®PRO

V3.1

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

)

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TABLE OF CONTENTS

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

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

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

Length, Width and Height Keys (

AVAILABLE ON TRIG MODEL

#4080).......2

NOT

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 (

AVAILABLE ON TRIG MODEL

#4080).....13

NOT

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

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

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

Blocks (

NOT AVAILABLE ON TRIG MODEL

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

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

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

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

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

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

Concrete Footings (

TRIG MODEL

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

NOT AVAILABLE ON

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 ..2 6

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

Rake-Wall –
Rake-Wall –

No Base

........................28

With Base

......................29

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

Stairs –
Stairs –
Stairs –

Given Rise and Run
Given Rise Only

...................31

.............30

Riser Limited Function

.........32

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

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KEY DEFINITIONS

Basic Function Keys

+ – x Arithmetic operation keys.

÷ =

% Four-function (+, –, x, ÷ )

percent key.

0 – 9 Keys used for entering
and • numbers.

O

o

Ç

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.

ß

Store Key

— Used for

storing values.

®

Recall Key

— Recalls

stored values.

POCKET REFERENCE GUIDE —1

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Unit Keys

y Yards
f Feet
i Inch
/ Fraction Bar
m Meters
Ç 7 Centimeters
Ç 9 Millimeters
Ç 2 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.

POCKET REFERENCE GUIDE —2

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Ç a

Radius

— Enters or calcu-

lates circle radius.

Construction Project Keys

Ç l

Ç 8

Â

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).

Board Feet

— Enters or
converts cubic values to
Board Feet.

Compound Miter

—

Ç C

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°.

Column/Cone

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

POCKET REFERENCE GUIDE —3

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Ç h

Drywall

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

Ç W

Ç d

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

Ç R

Ç 5

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.

POCKET REFERENCE GUIDE —4

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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 Finds the Cosine.

Ç ç

Arccosine (cos-1)

—
Gives the angle for the
Cosine value.

t Finds the Tangent.

Ç t

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

Slope

— Enters a Pitch

ratio, or slope (e.g., • 5

8 3 Ç p).

r Enters or calculates the ver-

tical leg of a right triangle.

Ç r

Rake-Wall

— Finds the
stud sizes based on entered
right triangle values.

POCKET REFERENCE GUIDE —5

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R Enters or calculates the

horizontal leg of a right tri­angle.

d

Diagonal

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

H

Hip/Valley

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

Ç H Enters

irregular

pitch used
to calculate lengths of the
irregular Hip/Valley and
Jack rafters.

j Calculates Jack rafter

lengths on the

regular

pitched roof side.

Ç j Calculates Jack rafter

lengths on the

irregular

pitched roof side.

ß 5

— Stores On-center
spacing value (default: 16")
for rafters and Rake-Walls.
Also used for studs.

-

-

POCKET REFERENCE GUIDE —6

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Stair Layout Key

s Given rise and/or run and

stored variables, calculates
or displays:

Press

Result

1 Riser Height
2 Number of Risers
3 Riser Overage/

Underage
4 Tread Width
5 Number of Treads
6 Tread Overage/

Underage
7 Stairwell Opening
8 Stringer Length
9 Angle of Incline
10 Stored or

Calculated Run
11 Stored or

Calculated Rise
12 Stored Desired

Riser Height
13 Stored Desired

Tread Width
14 Stored Headroom
15 Stored Floor

Thickness

POCKET REFERENCE GUIDE —7

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Ç s

Riser Limited

—
Recalculates
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

Riser Height

• 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.

POCKET REFERENCE GUIDE —8

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Miscellaneous Functions

B Backspace Key
® = Paperless Tape
Ç ß Preference Settings
Ç ÷ (1/x) Reciprocal
Ç x Clear All
Ç – (+/–) Toggle
Ç + Pi (π) 3.141593
Ç • Converts between D:M:S

and Decimal Degrees.

Ç % x

2

Ç B ( ) Square Root
Ç / Exponential Notation (x10

y

Ç 0 Total Cost (based on entry

of per unit cost)

ß 0 Stores Weight per Volume
Ç 6 Tons
Ç 4 Pounds

)

Ç 3 Metric Tons
Ç 1 Kilograms
μ Memory +
Ç μ (M–) Memory Minus

POCKET REFERENCE GUIDE —9

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ß 1 (M1) Storage Register
ß 2 (M2) Storage Register
ß 3 (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

o

5 Yards 5 y

Clear calculator

o

17.5 Meters 1 7 • 5 m

Clear calculator

o

100 Centimeters 1 0 0 Ç 7

Clear calculator

o

500 Millimeters 5 0 0 Ç 9

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

POCKET REFERENCE GUIDE —10

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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
enter Square or Cubic values.

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: Feet-Inches format cannot be used to

POCKET REFERENCE GUIDE —11

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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.

POCKET REFERENCE GUIDE —12

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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 DISPLAY

o o 0.
1 5 f l LNTH 15

FEET 0 INCH

2 0 f W WDTH 20 FEET 0 INCH
8 f h HGHT 8 FEET 0 INCH
h VOL 2400. CU FEET
h WALL 560. SQ FEET
h ROOM 860. SQ FEET

POCKET REFERENCE GUIDE —13

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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 =

FEET 1-1/4 INCH

5

Linear Conversions

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

KEYSTROKE DISPLAY

1 0 f 6 i 10 FEET 6 INCH
Ç f* 10.5 FEET
Ç i* 126. INCH
Ç y 3.5 YD
Ç m 3.200 M

Ç 9
Ç 7

*Repeated presses of
between Feet-Inch-Fractions and Decimal Feet
or Inches.

(mm)
(cm)

f

or

i

3200.4 MM

320.04 CM

will toggle

POCKET REFERENCE GUIDE —14

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Square and Cubic Conversions

Convert 14 Square Feet to Square Yards:

KEYSTROKE DISPLAY

1 4 f f 14 SQ FEET
Ç y 1.555556 SQ YD

Convert 12 Cubic Feet to Cubic Yards:

KEYSTROKE DISPLAY

1 2 f f f 12 CU FEET
Ç y 0.444444 CU YD

Blocks (NOT A VAILABLE 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 DISPLAY

o o 0.
8 f x 2 2 f = 176.

Ç l

(Blocks)

BLKS 198.

SQ FEET

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?

(Cont’d)

POCKET REFERENCE GUIDE —15

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(Cont’d)

KEYSTROKE DISPLAY

o o 0.

2 x 4 x 1 6 Ç 8 μ

BDFT 10.66667

M

2 x 1 0 x 1 8 Ç 8 μ

BDFT 30.

M

2 x 1 2 x 2 0 Ç 8 μ

BDFT 40.

M

® ® BDFT 80.66667

x 2 7 5 Ç 0

(Cost)

$22.

18

Circle Area and Circumference

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

KEYSTROKE DISPLAY

o o 0.
2 5 i C DIA 25 INCH
C AREA 490.8739 SQ INCH
C 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 ARC 74.48°
a CORD 3 FEET 0-5/16 INCH
a SEG 1.051381 SQ FEET
a PIE 4.0625 SQ FEET
a RISE 0 FEET 6-1/8 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 0.
3 8 ß Â SPRG 38.00°

STORED

6 0 Â MITR 46.84°
 BEVL 43.03°
 SPRG 38.00°

STORED

 CRNR 60.00°

POCKET REFERENCE GUIDE —17

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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.
® 0 1.5

STORED

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 7.954101 CU YD
x 3 = 23.8623 CU YD

4. Convert to tons:

Ç 6

(ton)

35.79345 Ton

Trig Model (#4080) Users: As this model does

not have a
using the

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h

r

POCKET REFERENCE GUIDE —18

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key, you must enter the height

key.

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 0.
8 i x 1 6 i = 128.
ß 6 F-AR 128. SQ INCH

1 0 0 f Ç W

STORED

(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 DISPLAY

o o 0.
4 5 f 5 i 45

FEET 5 INCH

x 1 3 f 6 i 13 FEET 6 INCH
x 5 i = 9.461806 CU YD

x 6 5 Ç 0

(Cost)

$615.

02

(total cost)

POCKET REFERENCE GUIDE —19

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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 DISPLAY

o o 0.
1 2 5 f f 125

Ç h

(Drywall)

4X8 3.90625

SQ FEET

h 4X9 3.472222
h 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:

POCKET REFERENCE GUIDE —20

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KEYSTROKE DISPLAY

o o 0.

7 f 5 i Ç a

(Radius)

RAD 7 FEET 5 INCH

5 Ç R

(Polygon)

FULL 108.00°

R HALF 54.00°
R SIDE 8

FEET 8-5/8 INCH

R PER 43 FEET 7-1/8 INCH
R AREA 130.7868 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 0.
8 i p PTCH 8

INCH

1 5 f x 1 3 f = 195. SQ FEET

Ç d

(Roof)

ROOF 234.3608 SQ FEET

d SQRS 2.34
d BNDL 7.03
d B-SZ 33.33
d 4X8 7.32

POCKET REFERENCE GUIDE —21

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Squaring-Up a Foundation

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

KEYSTROKE DISPLAY

o o 0.

1 5 f 6 i l

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 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

POCKET REFERENCE GUIDE —22

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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 0.

2 5 f Ç 5

* If you are working with a number other than
16 Inches On-center, change it via
(e.g., 18 Inches o.c., enter
then recalculate above).

(Studs)

1 8 i ß 5

STUD 20.

ß 5

,

POCKET REFERENCE GUIDE —23

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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 DISPLAY

o o 0.
3 0 • 2 5 p PTCH 30.25°
p %GRD 58.31828
p SLP 0.583183
p 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)

p PTCH 7-1/2

SLP 0.625

INCH

p PTCH 32.01°
p %GRD 62.5

Angle —

(TRIG #4080 AND DESKTOP #44080 MODELS ONLY)

Rise and Hypotenuse Known

Find the angle that connects the Rise and
Hypotenuse of a Right Triangle, if the Rise
is 6 Feet and the Hypotenuse is 10 Feet
in length:

POCKET REFERENCE GUIDE —24

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KEYSTROKE DISPLAY

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

o o 0.
6 f ÷ 1 0 f = 0.6

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

Ç ç
Ç •

(cos-1)

(dms deg)

53.13°

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 0.

7 i p PTCH 7

INCH

2. Enter half the span as the run:

2 8 f ÷ 2 = 14 FEET 0 INCH
R RUN 14 FEET 0 INCH

3. Find the Common and cuts:

d DIAG 16 FEET 2-1/2 INCH
d PLMB 30.26°
d LEVL 59.74°

POCKET REFERENCE GUIDE —25

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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 0.
6 f R RUN 6

FEET 0 INCH

9 i p PTCH 9 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/V 9 FEET 7-1/4 INCH
H PLMB 27.94°
H LEVL 62.06°
H CHK1 45.00°
j JKOC 16

STORED

INCH

j INCR 1 FEET 8 INCH
j JK 1 5 FEET 10 INCH
j JK 2 4 FEET 2 INCH
j JK 3 2 FEET 6 INCH

POCKET REFERENCE GUIDE —26

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j JK 4 0 FEET 10 INCH
j JK 5 0 FEET 0 INCH
j PLMB 36.87°
j LEVL 53.13°
j 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

8 i Ç H

(o.c.)

OC 16 INCH

STORED

(Ir/Pitch)

IPCH 8 INCH

H IH/V 11 FEET 0-7/8 INCH

POCKET REFERENCE GUIDE —27

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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 16 INCH

STORED

r RW 1 2 FEET 6-13/16 INCH
r RW 2 1 FEET 7-5/8 INCH
r RW 3 0 FEET 8-3/8 INCH
r BASE 0 FEET 0 INCH

3. Find Rake-Wall angle of incline:

r RW 34.99°

POCKET REFERENCE GUIDE —28

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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 0.
4 f r RISE 4

FEET 0 INCH

8 f R 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 RWOC 16 INCH

STORED

r RW 1 8 FEET 4 INCH
r RW 2 7 FEET 8 INCH
r RW 3 7 FEET 0 INCH
r RW 4 6 FEET 4 INCH
r RW 5 5 FEET 8 INCH
r BASE 5 FEET 0 INCH
r RW 26.57°

POCKET REFERENCE GUIDE —29

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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 DISPLAY

1. Enter rise and run:

o o 0.

1 0 f 1 i r

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 R-HT 7-1/2 INCH

STORED

s R-HT 7-9/16 INCH
s RSRS 16.
s R+/– 0
s T-WD 9-15/16 INCH
s TRDS 15.
s T+/– 0-1/16
s OPEN 9 FEET 10-1/4 INCH

INCH

INCH

s STRG 15 FEET 7-5/16 INCH
s INCL 37.27°

POCKET REFERENCE GUIDE —30

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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 0.

9 f 1 1 i r

RISE 9

FEET 11 INCH

2. Recall stored desired stair riser height:

® 7 R-HT 7-1/2 INCH

STORED

3. Recall stored desired stair tread width:

® 9 T-WD 10 INCH

STORED

4. Find stair values:

s R-HT 7-7/16 INCH
s RSRS 16.
s R+/– 0
s T-WD 10 INCH

STORED

INCH

s TRDS 15.
s T+/– 0

INCH

s OPEN 10 FEET 1 INCH
s STRG 15 FEET 6-15/16 INCH
s INCL 36.64°

POCKET REFERENCE GUIDE —31

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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 0.

1 0 f 1 i r

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 7-1/2 INCH

Ç s

(Riser Limited)

STORED

R-HT 7-1/8 INCH

s RSRS 17.
s R+/– 0-1/8
s T-WD 9-5/16 INCH
s TRDS 16.

INCH

s T+/– 0

INCH

s OPEN 9 FEET 9-5/8 INCH
s STRG 15 FEET 7-5/8 INCH
s INCL 37.42°

POCKET REFERENCE GUIDE —32

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DEFAULT SETTINGS

After a

Clear All

(Ç x), your calculator

will return to the following settings:

STORED VALUES DEFAULT VALUE

Desired Riser Height 7-1/2 INCH
Desired Tread Width 10 INCH
Floor Height 10 INCH
On-center Spacing 16 INCH
Weight per Volume 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 DEFAULT VALUE

Fractional Resolution 1/16
Area Display Standard
Volume Display Standard

(Cont’d)

POCKET REFERENCE GUIDE —33

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(Cont’d)

PREFERENCE SETTINGS DEFAULT VALUE

Stairway Headroom 6 feet 8 inch
Rake-Wall Descending
Arched Wall Outside
Jack Rafters Descending
Irregular Jack Spacing OC-OC
Exponent Off
Meter Linear Display 0.000
Decimal Degree Display 0.00°
Fractional Mode Standard

*Depressing the Reset button located above the

p

key will also perform a Full Reset.

POCKET REFERENCE GUIDE —34

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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.

Software copyrighted and licensed to

Calculated Industries, Inc. by

Construction Master Technologies, LLC, 2006.

Pocket Reference Guide copyrighted by

Calculated Industries, Inc. © 2006.

Construction Master® and Calculated Industries® are

registered trademarks of Calculated Industries, Inc.

ALL RIGHTS RESERVED

CALCULATED INDUSTRIES®

Designed in the U.S.A.

Printed in China

3/06

PRG4065E-E

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