Calculated Industries Construction Master IV Bedienungsanleitung
CONSTRUCTION MASTER®IV
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..................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
User's Guide — 3
THE CONSTRUCTION MASTER®IV
Designed for today’s construction pro-
fessional, the Construction Master®IV
is so simple, even the novice user will
find it easy to solve hundreds of di-
mension-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!
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.
[] — Square Root Key
Used to find the square root of a
non-dimensional or area value.
User's Guide — 5
[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.
[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 calcula-
tor by setting to Imperial (English) or
Metric mode. Note: This setting is
not affected by the ALL CLEAR
function.
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 (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 Deci-
mal 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 enter-
ing 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).
8 — Construction Master IV
Right Triangle/Rafter Keys
[Pitch]
This key is used to enter or calculate
the pitch (slope) of a roof (or right tri-
angle). 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 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 verti-
cal leg (height) of a right triangle.
[Run] — Run Key
Enters or calculates the run or hori-
zontal 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.
User's Guide — 9
[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, oth-
erwise 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.
10 — Construction Master IV
[Jack] — Jack Rafter Key
Finds the jack rafter sizes – from
largest to smallest – for both regular
and irregular pitched roofs. The ini-
tial jack rafter values displayed are
from the regular pitched side. After
showing the minimum value, the cal-
culator 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 dis-
plays the irregular pitched side jack
rafters first. The calculator uses the
same on-center spacing as the regu-
lar pitch sided jack rafters unless a
new on-center spacing is entered
(e.g., 19.2 [Inch] [Conv] [Jack]).
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