Calculated Industries 4045 User Manual

User’s Guide

CONSTRUCTION MASTER®IV

For Today’s Construction Professional

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ONSTRUCTIONMASTER

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INTRODUCING:

THE CONSTRUCTION MASTER IV

®

Designed for busy construction professionals,
the new Construction Master IV lets you solve
hundreds of dimension-related problems
quickly and accurately in Metric or feet-inch
formats!

◆ Solve Dimensional Math with Ease

◆ Instant Dimensional Conversions

◆ Complete Metric/Imperial Conversions

◆ Calculate Square and Rectangular Areas

◆ Find Cubic Volumes

◆ Solve Right-Triangle problems

◆ Find Regular and Irregular Hip/Valley

Rafters

◆ Find Regular and Irregular Jack Rafters

◆ Calculate Stair Risers, Treads and Stringers

◆ Solve Rake-Wall Stud Lengths

◆ Convert between Volume and Weight

◆ Estimate Board Feet

◆ Find Circular Areas, Circumferences, Arcs

◆ Material Estimations

◆ Paperless Tape Function

◆ And much, much more!

3 — User’s Guide

KEY DEFINITIONS/FUNCTIONS

Basic Functions

[+] [–] [x]
[÷] [=] Arithmetic operation keys.

[%] Four-function percent key.

0 – 9 Digits used for keying-in numbers.

[ • ] Decimal point.

[Off]

Turns all power off. Resets the dis­play and all non-permanent registers.

[On/C] Turns on power. Pressing once

clears the last entry and the dis­play. Pressing twice in succession
clears all temporary registers.

[Conv]

Used to convert between dimen­sions. Dimensions can only be con­verted within the same convention
(i.e., linear, square or cubic). Also
used to access special functions.

GETTING STARTED

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Used to find the square root of a
number.

[Conv]

x2 — Finds the square of the dis­played value.

[M+] Memory Plus — Stores the dis-

played number in the semi-perma­nent Memory. Also adds the
displayed number to any previous­ly stored value in Memory. The
total stored in Memory is recalled
by pressing [Rcl] prior to [M+].

[Conv]
[M+] Memory Minus (M–) — Subtracts

the displayed value from Memory.

[Rcl] Recall — Recalls values stored in

any register (i.e., press [Rcl] and
then the key you wish to display
the value of). [Rcl] [M+] displays
Memory content.

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[Rcl] [x] Imperial/Metric Mode — Selects

either Imperial or Metric defaults
for the following settings: pitch,

stair riser height, and on-center spac­ing for jack rafters and rake-walls.

Note: This is a permanent setting

cleared only by removing batteries
or manually resetting.

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[Conv]
[Rcl] Memory Clear — Clears the

Memory without changing the
current display.

Dimension Keys

[Yds] Yards — This is an entry and con-

version key (when used with

[Conv]).

[Feet] Feet — This is an entry and con-

version key (when used with
[Conv]). This key can also be used
in conjunction with the [Inch] and
[/] keys for entering in Feet-Inch­Fractions.

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[Inch] Inches — This is an entry and con-

version key (when used with
[Conv]). This key can also be used
in conjunction with the [/] key for
entering values in Fractional Inch
format.

[/] Fraction Bar — This key is used to

enter fractions. For example, to
enter 1/2, the key sequence would
be: 1 [/] 2.

[Cu] Cubic — This key is used with a

dimension key to identify a value
as being a volume.
Example: 5 [Cu] [Yds].

[Sq] Square — This key is used with a

dimension key to identify a value
as being an area.
Example: 10 [Sq] [Meters].

[m] Meters — This is an entry and con-

version key used to enter decimal
meters or to convert decimal
meters.

[cm] Centimeters — Entry and conver-

sion key for centimeters. Operates
the same as metric.

7 — User’s Guide

[mm] Millimeters — Entry and conver-

sion key for millimeters. Operates
the same as metric.

[Bd Ft] Board Feet — This key is used to

enter or convert cubic values to
board feet (using [Conv]). One
board foot is equal to 144 cubic
inches (1 inch x 1 foot x 1 foot).

[Weight] Weight — This key is used to con-

vert volume to a weight value using
the [Conv] key and the stored
Weight per Volume factor (see
below). Press repeatedly to toggle
between tons, pounds and kilo­grams.

[Conv]
[%]

Weight per Volume — Used to set the
Weight per Volume factor. Factor
can be entered as Kilograms per
Cubic Meter, Tons per Cubic Yard,
or Pounds per Cubic Yard. To set a
different weight per volume, i.e.,
2150 Kilograms per Cubic Meter,
press 2150 [Conv] [%] [%] [%].

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Right Triangle/Rafter Keys

[Pitch] Pitch — This key is used to per-

manently enter or calculate the
pitch (slope) of a roof (or right tri­angle). Pitch may be entered as an
inch format (9 [Inch] [Pitch]), or
as an angle in degrees (i.e., 30
[Pitch] for 30°), or also as a unit­less ratio (0.75 [Conv] [Pitch]).

[Rise] Rise — This key enters or calcu-

lates the rise or vertical leg of a
right triangle.

[Run] Run — This key enters or calcu-

lates the run or horizontal leg (or
base) of a right triangle.