Calculated Industries Construction Master IV User manual

ONSTRUCTION

ASTER

For Today's Construction Professional

User’s Guide

2 — Construction Master IV

Table of Contents

The Construction Master IV..................3

Getting Started......................................4

Key Definitions/Functions ...................4

Fractional Settings............................13

Entering Dimensions.........................14

Basic Math Operations......................18

Percentage Calculations...................20

Memory Operation............................21

Paperless Tape.................................23

Linear Calculations...........................25

Area Calculations..............................27

Volume Calculations.........................30

Volume / Weight Calculations...........35

Board Feet/ Lumber Calculations......36

Right-Triangle Calculations...............37

Hip/Valley & Jack Rafters.................45

Stair Problems (Risers/Treads).........51

Circle Problems................................54

Appendix A..........................................55

Accuracy/Errors................................55

Battery & Auto Shut-Off....................56

Default Values..................................56

Appendix B..........................................57

Warranty..............................................59

User's Guide — 3

THE CONSTRUCTION MASTER IV

Designed for today’s construction pro-

fessional, the all-new Construction

Master IV® adds even more power

and ease of use to the already power-

ful Construction Master line-up. As

with earlier models, the format of this

calculator is so simple, even the nov-

ice user will find it easy to solve hun-

dreds of dimension-related problems

right in feet, inches and fractions!

♦Solve Dimensional Math

♦English/Metric Conversions

♦Calculate Areas/Volumes

♦Solve Right-Triangle Problems

♦Find Regular & Irregular Hip,

Valley and Jack Rafters

♦Calculate Stair Risers, Treads &

Stringers

♦Solve Raked Wall Stud Lengths

♦Volume/Weight Conversions

♦Estimate Board Feet

♦Find Circular Areas, Circumfer-

ences & Arcs

♦Material Estimations

♦Paperless Tape Function

♦And much, much more!

4 — Construction Master IV

GETTING STARTED

Key Definitions/Functions

Basic Function Keys

[+] [–] [x] [÷] [=]

Arithmetic operation keys.

[%]

Four-function percent key.

[0] – [9] and [ • ]

Digits used for keying-in numbers.

[Off] — Off Key

Turns all power off, clearing all

non-permanent registers.

[On/C] — On/Clear Key

Turns on power. Pressing once

clears the display. Pressing twice

clears all temporary values.

[Conv] — Convert Key

Used with the dimensional keys to

convert between dimensions or with

other keys to access special func-

tions.

User's Guide — 5

[] — Square Root Key

Used to find the square root of a

non-dimensional or area value.

[Conv] [ ] — x2Function

Finds the square of a linear or non-

dimensional value.

[M+] — Memory Key

Adds the displayed value to Mem-

ory. Clears when the calculator is

shut off.

[Conv] [M+] — Memory Minus (M–)

Subtracts the displayed value from

Memory.

[Rcl] — Recall Key

Used with other keys to recall

stored values and settings.

[Rcl] [x] — Imperial/Metric Mode

Changes the defaults of the calcu-

lator by setting to Imperial (Eng-

lish) or Metric mode. Note: This

setting is not affected by the ALL

CLEAR function.

[Conv] [Rcl] — Memory Clear

Clears Memory without changing

current display.

6 — Construction Master IV

Dimension Keys

[Weight] — Weight Key

Enters or converts (a volume value)

to tons, pounds, metric tons or kilo-

grams. Repeated presses will cycle

through these units.

[Conv] [%] — Weight/Volume

Enters or converts the Weight per

Volume setting as Tons/Yard³,

Lbs/Yd³, Lb/Ft³, Metric Ton/m³ or

kg/m³. Repeated presses will cycle

through these settings.

[Cu] — Cubic Key

Defines a volume (5 [Cu] [Yds]).

[Sq] — Square Key

Defines an area (5 [Sq] [Feet]).

[Yds] — Yards Key

Enters or converts to yards.

[Feet] — Feet Key

Enters or converts to feet as whole

or decimal numbers. Also used with

the [Inch] and [/] keys for entering

Feet-Inch values (6 [Feet] 9 [Inch] 1

[/] 2). Repeated presses toggle be-

tween Feet-Inch and Decimal Feet.

User's Guide — 7

[Inch] — Inch Key

Enters or converts to inches. Entry

can be whole or decimal numbers.

Also used with the [/] key for en-

tering fractional inch values (9

[Inch] 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] — Meter Key

Enters or converts to meters.

[cm] — Centimeter Key

Enters or converts to centimeters.

[mm] — Millimeter Key

Enters or converts to millimeters.

[Bd Ft] — Feet Key

Enters or converts cubic values to

board feet. One board foot is equal

to 144 cubic inches (1 foot x 1 foot

x 1 inch).

8 — Construction Master IV

Right Triangle/Rafter Keys

[Pitch]

This key is used to enter or calcu-

late the pitch (slope) of a roof (or

right triangle). Pitch is the amount

of "Rise" over 12 inches (1 meter, if

metric) of "Run." Pitch may be en-

tered as:

a dimension 9 [Inch] [Pitch]

an angle 30 [Pitch]

a ratio 0.75 [Conv] [Pitch]

a percentage 75 [%] [Pitch]

A pitch entry will remain in perma-

nent storage until revised or reset. A

solution will be replaced by its en-

tered value once the calculator is

cleared.

[Rise] — Rise Key

Enters or calculates the rise or ver-

tical leg (height) of a right triangle.

[Run] — Run Key

Enters or calculates the run or hori-

zontal leg (base) of a right triangle.

User's Guide — 9

[Diag] — 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.

[Conv] [Diag] — Raked Walls

This function finds the decreasing

stud sizes in a raked wall based on

computed or entered values for

pitch, rise and/or run. Repeated

presses display stud sizes from

longest to shortest.

The on-center spacing of a raked

wall can be permanently stored by

entering a dimension prior to solv-

ing for stud sizes (12 [Inch] [Conv]

[Diag]). Default on-center spacing

is 16 inches (Metric Mode: 600 mm).

[Hip/V] — Hip/Valley Rafter Key

Finds the regular or irregular hip/

valley rafter length. If an irregular

pitch is entered, the irregular hip/

valley rafter length is displayed,

otherwise the regular (45º) hip/

valley rafter length is displayed.

10 — Construction Master IV

[Conv] [Hip/V] — Irregular Pitch

Enters and displays the irregular

pitch value used to calculate lengths

of the irregular hip/valley and jack

rafters.

[Jack] — Jack Rafter Key

Finds the jack rafter sizes – from

largest to smallest – for both regular

and irregular pitched roofs. The

initial jack rafter values displayed

are from the regular pitched side.

After showing the minimum value,

the calculator will display the sizes

for the irregular pitched side. An

on-center spacing can be entered by

pressing [Jack] (i.e., 12 [Inch]

[Jack]). The default spacing is 16

inches (Metric Mode: 600 millime-

ters).

[Conv] [Jack] — Irregular Side Jacks

Operates same as [Jack], but dis-

plays the irregular pitched side jack

rafters first. The calculator uses the

same on-center spacing as the

regular pitch sided jack rafters un-

less a new on-center spacing is en-

tered (19.2 [Inch] [Conv] [Jack]).

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