Calculated Industries 4045-B User Manual
CONSTRUCTION MASTER
For Today's Construction Professional
®
IV
User’s Guide
Table of Contents
The Construction Master
GETTING STARTED...........................4
Key Definitions/Functions................4
Fractional Settings.........................13
Entering Dimensions.....................14
Basic Math Operations..................16
Percentage Calculations ...............18
Memory Operation.........................19
Paperless Tape.............................20
EXAMPLES.......................................22
Linear Calculations........................22
Area Calculations..........................24
Volume Calculations .....................27
Volume/Weight Calculations ........31
Board Feet/ Lumber Calculations..32
Right-Triangle Calculations..........32
Hip/Valley & Jack Rafters..............39
Stair Problems (Risers/Treads)....43
Circle Problems.............................46
Appendix A.......................................47
Battery & Auto Shut-Off.................47
Default Values...............................47
Appendix B.......................................48
Repair and Return ...........................50
Warranty...........................................51
®
IV...........3
2 — Construction Master IV
THE CONSTRUCTION MASTER
Designed for today’s construction professional, the Construction Master
®
IV
®
IV
is so simple, even the novice user will
find it easy to solve hundreds 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 and Irregular Hip,
Valley and Jack Rafters
♦ Calculate Stair Risers, Treads
and Stringers
♦ Solve Raked Wall Stud Lengths
♦ Volume/Weight Conversions
♦ Estimate Board Feet
♦ Find Circular Areas,
Circumferences and Arcs
♦ Material Estimations
♦ Paperless Tape Function
♦ And much, much more!
User's Guide — 3
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 nonpermanent 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 functions.
] — Square Root Key
[
Used to find the square root of a
non-dimensional or area value.
4 — Construction Master IV
[Conv] [
] — x2 Function
Finds the square of a linear or nondimensional value.
[M+] — Memory Key
Adds the displayed value to Memory. Clears when the calculator is
shut off.
[Conv] [M+] — Memory Minus (M–)
Subtracts the displayed value from
Memory.
[Conv] [Rcl] — Memory Clear
Clears Memory without changing
current display.
[Rcl] — Recall Key
Used with other keys to recall stored
values and settings.
[Rcl] [x] — Imperial/Metric Mode
Changes the defaults of the calculator by setting to Imperial (English) or
Metric mode. Note: This setting is
not affected by the ALL CLEAR
function.
User's Guide — 5
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 (e.g., 5 [Cu]
[Yds]).
[Sq] — Square Key
Defines an area (e.g., 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 (e.g., 6 [Feet] 9
[Inch] 1 [/] 2). Repeated presses
toggle between Feet-Inch and Decimal Feet.
6 — Construction Master IV
[Inch] — 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
[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).
User's Guide — 7
Right Triangle/Rafter Keys
[Pitch]
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 (1 meter, if metric) of
"Run." Pitch may be entered 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 permanent storage until revised or reset. A
solution will be replaced by its entered value once the calculator is
cleared.
[Rise] — Rise Key
Enters or calculates the rise or vertical leg (height) of a right triangle.
[Run] — Run Key
Enters or calculates the run or horizontal leg (base) of a right triangle.
[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.
8 — Construction Master IV
[Conv] [Diag] — Rake 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 solving
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.
[Conv] [Hip/V] — Irregular Pitch
Enters and displays the irregular
pitch value used to calculate lengths
of the irregular hip/valley and jack
rafters.
User's Guide — 9
[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 millimeters).
[Conv] [Jack] — Irregular Side Jacks
Operates same as [Jack], but displays the irregular pitched side jack
rafters first. The calculator uses the
same on-center spacing as the regular pitch sided jack rafters unless a
new on-center spacing is entered
(e.g., 19.2 [Inch] [Conv] [Jack]).
10 — Construction Master IV
Stair & Circle Keys
[Stair] — Stair Key
A multi-function key that enters a
desired riser height and uses the
rise and run values to compute and
display the following:
Default value is 7-1/2 inches (Metric
Mode: 185 millimeters).
[Circ] — Circle
Displays the following values, given
an entered diameter:
1) diameter,
2) area, and
3) circumference.
[Conv] [Circ] — Arc Length
Calculates the arc length based on
an entered diameter and angle.
Result
Press
1 Number of Risers
2 Actual Riser Height
3 Riser
4 Number of Treads
5 Actual Tread Width
6 Tread
7 Stringer Length
8 Inclination Angle
Overage/Underage
Overage/Underage
User's Guide — 11
Additional [Conv] Key Functions
When used in conjunction with the
following keys, the [Conv] key gives
access to these additional functions:
[Conv] [ ÷]
Reciprocal, or 1/x function.
[Conv] [ x ] — All Clear
Clears all values, including Memory.
Resets all permanent settings to defaults. Note: Will not change the Im-
perial/Metric mode setting. [Rcl] [x]
changes this setting.
[Conv] [ + ] — Pi (π)
Constant = 3.141593.
[Conv] [ – ] — Sign (+ / –) Toggle
Toggles the sign of the displayed
value.
[Conv] [ = ] — Paperless Tape
Accesses the paperless tape mode.
[Conv] [ • ] — Per Function
Allows you to compute a total material cost given a unit dimension and
an entered Per Unit Cost. Note:
Board feet calculations are per 1,000
Bdft (Mbm)
12 — Construction Master IV
Fractional Settings
Setting Fractional Accuracy
When your calculator is in a default
condition (battery change or full reset),
it is set to round fractional values to the
nearest 1/16th of an inch. The
fractional level can be revised by using
the following keystrokes:
[Conv] 1 = Accuracy set to 1/1
[Conv] 2 = Accuracy set to 1/2
[Conv] 3 = Accuracy set to 1/3
[Conv] 4 = Accuracy set to 1/4
[Conv] 6 = Accuracy set to 1/6
[Conv] 8 = Accuracy set to 1/8
) will appear in the bottom left
A star (
of the display when the calculator is
turned on, if the setting is different from
the default. The fractional setting can
be displayed at any time by pressing
[Rcl] [ / ].
6
2
4
User's Guide — 13
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), pressing [ / ]
(fraction bar key) and then the
denominator (bottom). Note: If a
denominator is not entered, the
fractional setting value is used.
Examples of how linear dimensions are
entered:
Dimension
5 Yards 5 [Yds]
5 Feet 1-1/2 Inch 5 [Feet] 1 [Inch]
17.5 Meters 17.5 [m]
Square and Cubic Dimensions
Examples of how square and cubic
dimensions are entered:
Dimension
5 Cubic Yards 5 [Cu] [Yds]
130 Square Feet 130 [Sq] [Feet]
33 Square Meters 33 [Sq] [m]
Keystrokes
1 [ / ] 2
Keystrokes
14 — Construction Master IV
Linear Conversions
Convert 14 feet to other dimensions:
Keystroke Display
14 [Feet] . . .
[Conv] [Yds] 4.666667 YD
[Conv] [Feet] 14 FT 0 IN
[Conv] [Feet] 14 FT
[Conv] [Inch] 168 IN
[Conv] [mm] 4267.2 MM
[Conv] [cm] 426.72 CM
[Conv] [m] 4.2672 M
Square Conversions
Convert 14 square feet to other square
dimensions:
Keystroke Display
14 [Sq] [Feet] . . .
[Conv] [Inch] 2016 SQ IN
* 1.555556 SQ YD
[Yds]
[m] 1.300643 SQ M
[mm] 1300643 SQ MM
[cm] 13006.43 SQ CM
* When performing conversions, [Conv] only
has to be pressed once.
User's Guide — 15
Cubic Conversions
Convert 14 cubic feet to other cubic
dimensions:
Keystroke Display
14 [Cu] [Feet] . . .
[Conv] [Inch] 24192 CU IN
[Yds] 0.518519 CU YD
[m] 0.396436 CU M
[cm] 396435.9 CU CM
* 0.396436 CU M
[mm]
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:
* The calculator's auto-range function forced
the answer to be in meters, as it is out of
the calculator's normal 7-digit range (See
Appendix A–Auto-Range).
16 — Construction Master IV
Adding Dimensions
Add 11 inches to 2 feet 1 inch:
11 [Inch] [+] 2 [Feet] 1 [Inch] [=]
*36 IN
Subtracting Dimensions
Subtract 3 feet from 11 feet
7-1/2 inches:
11 [Feet] 7 [Inch] 1 [ / ] 2
[–] 3 [Feet] [=] 8 FT 7-1/2 IN
Multiplying Dimensions
Multiply 5 feet 3 inches by 11 feet 61/2 inches:
5 [Feet] 3 [x] 11 [Feet]
6 [Inch] 1[ / ] 2 [=] 60.59375 SQ FT
Dividing Dimensions
Divide 30 feet 4 inches by 7 inches:
30 [Feet] 4 [Inch] [÷] 7 [Inch] [=] 52
Divide 20 feet 3 inches by 9:
20 [Feet] 3 [Inch] [÷] 9 [=] 2 FT 3 IN
* The format of the first value entered de-
termines the answer format. [Conv] can be
used to change to any format desired, provided convention is maintained.
User's Guide — 17
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