ONSTRUCTION MASTER
C
For Today's Construction Professional
®
IV
User’s Guide
Table of Content s
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
2 — Construction Master IV
T
HE CONSTRUCTION MASTER
Designed for today’s construction professional, the all-new Construction
Master IV® adds even more power
and ease of use to the already powerful Construction Master line-up. As
with earlier models, t he format of this
calculator is so simple, even the novice user will find i t easy to solve hu ndreds 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,
♦
IV
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!
♦
User's Guide — 3
G
ETTING STARTED
Key Definitions/Functions
Basic Function Keys
[+] [–] [x] [÷] [=]
Arithmetic operation keys.
[%]
Four-function percent key.
[0] – [9]
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 functions.
and
[ • ]
4 — Construction Master IV
[ ] — Square Root Key
Used to find the square root of a
non-dimensional or area value.
[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+ ] — M e mory Minus (M–)
Subtracts the displayed value from
Memory.
[Rcl] — Recall Key
Used with other keys to recall
stored values and settings.
[Rcl] [x] — Imp e ri al/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.
[Conv] [Rcl] — Memory Clear
Clears Memory without changing
current display.
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 (
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]
Feet-Inch values (
). Repeated presses toggle be-
[/] 2
and
keys for entering
[/]
6 [Feet] 9 [Inch] 1
tween 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 en-
[/]
tering fractional inch values (
[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 (b o tt o m) is n ot e nt e re d,
the calculator's fractional accuracy
setting is automatically used.
[m] — Meter Key
Enters or converts to meters.
9
[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/Ra fter 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.
8 — Construction Master IV
[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 solving for stud sizes (
[Diag]
). Default on-center spacing
12 [Inch] [Conv]
is 16 inches (Metric Mode: 600 m m ).
[Hip/V] — Hip/Vall ey R a fter K ey
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.
User's Guide — 9
[Conv] [Hi p/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.,
[Jack]
). The default spacing is 16
12 [Inch]
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 (
10 — Construction Master IV
19.2 [Inch] [Conv] [Jack]
).
Stair & Circle Keys
[Stair] — Stair Ke y
A multi-function key that enters a
desired riser height and uses the
rise and run values to compute and
display the following:
Press Result
1 Number of Risers
2 Actual Riser Height
3 Riser Overage/Underage
4 Number of Treads
5 Actual Tread Width
6 Tread Overage/Underage
7 Stringer Length
8 Inclination Angle
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.
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
Imperial/Metric mode setting. [Rcl]
[x] changes this setting.
[Conv] [ + ] — P i (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
12 — Construction Master IV
an entered Per Unit Cost. Note:
Board feet calculations are per
1,000 Bdft (Mbm)
Fractional Settings
Setting Fractional Accuracy
When your calculator is in a d efault
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 1/16
[Conv] 2 = Accuracy set to 1/2
[Conv] 3 = Accuracy set to 1/32
[Conv] 4 = Accuracy set to 1/4
[Conv] 6 = Accuracy set to 1/64
[Conv] 8 = Accuracy set to 1/8
A sta r () will appear in the bottom
left of the dis play 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] [ / ]
.
User's Guide — 13
Normal Fractional Mode
(Default) In Normal Mode (
), the fractional result is reduced to
7
its lowest common denominator (8/16
reduces to 1/2).
[Conv]
Fixed Fractional Mode
In the Fixed Mode (
tional results are displayed in the calculator's fractional accuracy setting.
[Conv] 9
), frac-
Flashing Denominator
Your calculator can be set to flash
the fractional accuracy setting in the
denominator during entry by pressing
[Conv] [ / ]
. Pressing
[Conv] [ / ]
again
will turn it off.
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
14 — Construction Master IV
the numerator (top), pressing
(frac-
[ / ]
tion 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 Keystrokes
5 Yards 5 [Yds]
5 Feet 1-1/2 Inch 5 [Feet] 1 [Inch]
1 [ / ] 2
17.5 Meters 17.5 [m]
Square and Cubic Dimensions
Square & cubic dimensions* are
entered in the following order:
(1) Numerical Value
(2) Convention — Square/Cubic
(3) Unit — Meters, Feet, Inches
Examples of how square and cubic
dimensions are entered:
* Feet-Inch format cannot be used to directly enter
square or cubic values.
User's Guide — 15
Dimension Keystrokes
5 Cubic Yards 5 [Cu] [Yds]
130 Square Feet 130 [Sq] [Feet]
33 Square Meters 33 [Sq] [m]
16 — Construction Master IV
Linear Conversions
Convert 14 feet to other dimensions:
Keystroke Display
14 [Feet] . . .
[Conv] [Yds]
[Conv] [Feet]
[Conv] [Feet]
[Conv] [Inch]
[Conv] [mm]
[Conv] [cm]
[Conv] [m]
4.666667 YD
14 FT 0 IN
14 FT
168 IN
4267.2 MM
426.72 CM
4.2672 M
Square Conversions
Convert 14 square feet to other square
dimensions:
Keystroke Display
14 [Sq] [Feet] . . .
[Conv] [Inch]
[Yds]
*
2016 SQ IN
1.555556 SQ YD
[m]
[mm]
[cm]
1.300643 SQ M
1300643 SQ MM
13006.43 SQ CM
* When performing conversions, [Conv] only has to be
pressed once.
User's Guide — 17
Cubic Conversions
Convert 14 cubic feet to other cubic
dimensions:
Keystroke Display
14 [Cu] [Feet] . . .
[Conv] [Inch]
[Yds]
[m]
[cm]
*
[mm]
24192 CU IN
0.518519 CU YD
0.396436 CU M
396435.9 CU CM
0.396436 CU M
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
* 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).
18 — Construction Master IV
This feature also makes the calculator
simple to use for dimensional applications:
Adding Dime nsions
Add 11 inches to 2 feet 1 inches:
11 [Inch] [+] 2 [Feet] 1 [Inch] [=]
*
36 IN
Add 2 feet 1 inches to 11 inches:
2 [Feet] 1 [Inch] [+] 11 [Inch] [=]
3 FT 0 IN
Subtracting Dimensions
Subtract 3 feet from 11 feet 7-1/2
inches:
11 [Feet] 7 [Inch] 1 [ / ] 2
[–] 3 [Feet] [=]
Subtract 32 inches from 81 inches:
81 [Inch] [–] 32 [Inch] [=]
8 FT 7-1/2 IN
49 IN
* The format of the first value entered determines the
answer format. [Conv] can be used to change to any
format desired, provided convention i s mai nt ai ned.
User's Guide — 19
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
Multiply 2 feet 7 inches by 10:
2 [Feet] 7 [Inch] [x] 10 [=]
25 FT 10 IN
Dividi ng 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
Percentage Ca lculations
The Percent [%] key can be used for
finding a given percent of a number or
for working add-on, discount or division percentage calculations. It can be
used with any type of number, in any
dimension (feet, inch, millimeter, etc)
and any type of convention (nondimensioned, linear, square or cubic).
20 — Construction Master IV
Computing Percentages
Find 18% of 500 feet:
500 [Feet] [x] 18 [%]
90 FT 0 IN
Add 10% to 137 square feet:
137 [Sq] [Feet] [+] 10 [%]
150.7 SQ FT
Take 20% from 552 feet 6 inches:
552 [Feet] 6 [Inch] [–] 20 [%]
442 FT 0 IN
Divide 350 cubic yards by 80%:
350 [Cu] [Yds] [÷] 80 [%]
437.5 CU YD
Memory Operation
Whenever the
[M+]
the displayed value will be added to
key is pressed,
the Memory. Other memory functions:
Function Keystrokes
Add to Memory [M+]
Subtract from Memory [Conv] [M+]
Recall total in Memory [Rcl] [M+]
Display/Clear Memory [Rcl] [Rcl]
Clear Memory [Conv] [Rcl]
Replace Memory [Conv] [Rcl] [M+]
User's Guide — 21
Memory is semi-permanent, clearing
only when you:
1) turn off the calculator;
2) press
3) press
4) press
[Rcl] [Rcl]
[Conv] [Rcl]
[Conv] [x]
;
;
(all clear).
How to Use Memory Functions:
Keystroke Display
355 [M+] 355.
255 [M+] 255.
745 [Conv] [M+] 745.
[Rcl] [Rcl] – 135.
10 [Feet] 5 [Inch] [M+] 10 FT 5 IN
M
M
M
M
5 [Feet] 3 [Inch] [M+] 5 FT 3 IN
[Rcl] [Rcl] 15 FT 8 IN
22 — Construction Master IV
M
Paperless Tape
The Paperless Tape allows the u ser to
display and review the last 20 entries
of a calculation.
tape mode and
[Rcl] [=]
or
[+]
accesses the
scrolls for-
[–]
ward or backward through the entries.
While in the Paperless Tape mode, the
display will show the entered or calculated value, along with the sequence
number of entry (e.g., 01, 02, 03, etc.)
and the math operator (+, –, x, ÷, %)
in the upper left corner of the display.
If
string,
in the upper left. If
has been used in the middle of a
[=]
SUB
(for Subtotal) will display
was the last
[=]
operation performed, the display will
show
TTL
(Total) as the last entry.
Pressing any key other than [Off], [+]
or [–] exits the Paperless Tape mode.
The last entry made (or
TTL
) will be
displayed, allowing you to either exit
completely, or to continue using the
last tape value for another operation.
Note: The Paperless Tape is cleared
each time [On/C ] is pressed twice, or
the unit is shut off.
User's Guide — 23
Previewing Paperless Tape
Keystroke Display
1. Enter a str ing of numbers:
4 [Feet] [+]
5 [Feet] [+]
6 [Feet] [+]
7 [Feet] [=]
2. Access the Tape funct i on:
[Rcl] [=]
3. Scroll from first value to total:
[+]
[+]
[+]
[+]
[+]
4. Scroll to last 2 values:
[–]
[–]
5.Exit Tape function and continue:
*
[=]
TTL= 22 FT 0 IN
TTL= 22 FT 0 IN
TTL= 22 FT 0 IN
15 FT 0 IN
22 FT 0 IN
01 4 FT 0 IN
02+ 5 FT 0 IN
03+ 6 FT 0 IN
04+ 7 FT 0 IN
04+ 7 FT 0 IN
03+ 6 FT 0 IN
4 FT 0 IN
9 FT 0 IN
[+]
2 [Feet] [=]
22 FT 0 IN
24 FT 0 IN
* Can press any key besides [Off], [+] or [–].
24 — Construction Master IV
Linear Calculations
Spacing Calculation — Lumber
How many 2 feet 2 inch pieces can be
made from fifteen 10 foot boards?
Keystroke Display
1. Divide board lengt h by sm al ler cuts
[On/C] [On/C]
10 [Feet]
[÷] 2 [Feet] 2 [Inch] [=]
2. Find tot al boards
4 [x] 15 [=]
4.615385
(or 4 whole boards)
60
(pieces)
0.
10 FT
Carpentry —
Calculating the Number of Studs
Find the number of 16 inch on-center
studs needed for a 18 feet 7-1/2 inch
wall.
Keystroke Display
1. Divide length by spacing
[On/C][On/C]
0.
18 [Feet] 7 [Inch] 1 [ / ] 2
[÷] 16 [Inch] [=]
2. Add one for the end
[+] 1 [=]
18 FT 7 1/2 IN
13.96875
14.96875
(14 studs)
(15 studs)
User's Guide — 25
Note
: Also applies to trusses and joists.
Masonry — Estimating Bricks
How many standard bricks (3-3/4 inch
by 8 inch) are required for a 36.5 feet
by 8 feet wall?
Keystroke Display
1. Find Brick Area
[On/C] [On/C]
3 [Inch] 3[ / ] 4 [x] 8 [Inch] [=]
30 SQ IN
2. Store in Memory and Find Wall Area
[M+]
36.5 [Feet] [x] 8 [Feet] [=]
30 SQ IN
292 SQ FT
3. Divide by brick area to find tot al bri cks
[÷] [Rcl] [M+] [=]
1401.6
(Bricks)
4. Add 5% for spoilage
[+] 5 [%]
1471.68
(1472 Bricks)
0.
26 — Construction Master IV
Area Calculations
Area of a Rectangle
What is the area of a ro om measuring
12 feet 6 inches by 15 feet 8 inches?
Keystroke Display
[On/C] [On/C]
12 [Feet] 6 [Inch]
[x] 15 [Feet] 8 [Inch] [=]
12 FT 6 IN
195.8333 SQ FT
0.
Area of a Square
Using the x2 ([Conv][ ]) function,
find the area of a square with sides of
4 feet 7 inches.
Keystroke Display
[On/C] [On/C]
4 [Feet] 7 [Inch]
[Conv][
]
4 FT 7 IN
21.00694 SQ FT
0.
User's Guide — 27
Area — Floor Covering
You have an apartment with two
rooms of carpet that need to be replaced. The room dimensions are as
follows: 12 feet 4 inches by 10 feet
and 14 feet 8 inches by 16 feet. How
many square yards of carpet are
needed and what is the total cost at
$11.75 per square yard?
Keystroke Display
[On/C] [On/C]
1. Find Area of Room 1 & Add to Memory
12 [Feet] 4 [Inch]
[x] 10 [Feet] [=] [M+]
Enter in Memory
12 FT 4 IN
123.3333 SQ FT
2. Find Area of Room 2 & Add to Memory
14 [Feet] 8 [Inch]
[x] 16 [Feet] [=] [M+]
14 FT 8 IN
234.6667 SQ FT
3. Find Total Area and Cost
[Rcl] [Rcl] [Conv] [Yds]
[x] 11.75 [Conv] [•]
39.77778 SQ YD
$467.39
0.
28 — Construction Master IV
Roof Covering — No. of Shingles
You’re going to use 12 inch wide by
36 inch long asphalt (strip) shingles
with 5 inch weather exposure. How
many shingles are required for a 1745
square foot roof? (Note: Shingle expo-
sure area = Exposure x length, and
Number of Shingles = Roof area ÷
shingle exposure area.)
Keystroke Display
1. Find and save shingle exposure area
[On/C] [On/C]
5 [Inch] [x] 36 [Inch] [=]
[M+]
2. Find Total Shingles Required
1745 [Sq] [Feet]
[÷] [Rcl] [Rcl] [=]
1396
3. Add 10% for waste
[+] 10 [%]
1535.6
(1536 shingles)
0.
180 SQ IN
180 SQ IN
1745 SQ FT
(shingles)
User's Guide — 29
Volume Calculations
Rect angular Containers
What is the volume of a container 3
feet by 1 foot 9-5/8 inches by 2 feet 4
inches? (LxWxH)
Keystroke Display
[On/C] [On/C]
3 [Feet]
[x] 1 [Feet] 9 [Inch] 5 [ / ] 8
[x] 2 [Feet] 4 [Inch] [=]
1 FT 9 5/8 IN
12.61458 CU FT
0.
3 FT
Volume of a Cylinder
You want to calculate the volume of a
cylinder with a diameter 2 feet 4
inches and a height of 4 feet 6 inches.
Keystroke Display
[On/C] [On/C]
2 [Feet] 4 [Inch]
[Circ] [Circ]
[x] 4 [Feet] 6 [Inch] [=]
2 FT 4 IN
AREA 4.276057 SQ FT
19.24225 CU FT
0.
30 — Construction Master IV
Simple Concrete Volume
You’re going to form up and pour
your own driveway and you need to
accurately calculate the cubi c yards of
concrete required for the job. The
measurements are as follows: 36 feet 3
inches long by 11 feet 6 inches wide
by 4 inches deep. What’s the volume
of your driveway, and if concrete costs
$55 per cubic yard, how much will
your concrete cost you?
Keystroke Display
[On/C] [On/C]
1. Find Volume
36 [Feet] 3 [Inch]
[x] 11 [Feet] 6 [Inch]
[x] 4 [Inch] [=]
[Conv] [Yds]
2. Multiply by Cost
[x] 55 [Conv] [•]
0.
38 FT 3 IN
11 FT 6 IN
138.9583 CU FT
5.146605 CU YD
$ 283.06 Per
User's Guide — 31
Concrete Columns
You’re going to pour five columns,
each of which has a diameter of 3 feet
4-1/2 inches and a height of 11 feet 6
inches. How many cubic yards of concrete will you need for all five columns?
Keystroke Display
[On/C] [On/C]
1. Find Surface Area of Column
3 [Feet] 4 [Inch] 1 [ / ] 2
[Circ] [Circ]
AREA 8.946176 SQ FT
2. Find Total Volume
[x] 11 [Feet] 6 [Inch] [=]
[Conv] [Yds]
[x] 5 [=]
102.881 CU FT
3.810408 CU YD
19.05204 CU YD
0.
3 FT 4 1/2 IN
32 — Construction Master IV
Complex Concrete Volume
You’re going to pour an odd-shaped
patio 4-1/2 inches deep with the dimensions shown below. First, calculate the total area (by dividing the
drawing into three individual rectangles) and then determine the total
yards of concrete required for this job.
27’ 0”
38’ 2”
B
8’ 6”
4’ 2”
A
9’ 6”
User's Guide — 33
C
9’ 0”
Keystroke Display
[On/C] [On/C] 0.
1. Find Area of Part A
38 [Feet] 2 [Inch] [–]
4 [Feet] 2 [Inch] [=] 34 FT 0 IN
[x] 27 [Feet] [=] 918 SQ FT
[M+]
2. Find Area of Part B
4 [Feet] 2 [Inch] 4 FT 2 IN
[x] 8 [Feet] 6 [Inch] [=] 35.41667 SQ FT
[M+]
3. Find Area of Part C
9 [Feet] 9 FT
[x] 9 [Feet] 6 [Inch] [=] 85.5 SQ FT
[M+]
4. Find Total Area
[Rcl] [Rcl] 1038.917 SQ FT
5. Find Total Cubic Yards
[x] 4 [Inch] 1 [ / ] 2 [=] 389.5937 CU FT
[Conv] [Yds] 14.4294 CU YD
34 — Construction Master IV
Volume / Weight Calculations
Concret e Footing
Find the total volume* of concrete
required to pour five 24 inch by 12
inch footings, each 2 feet deep. Then
find the weight of the concrete (use
1.5 tons per cubic yard).
Keystroke Display
[On/C] [On/C]
1. Enter Weight Per Volume
1.5 [Conv] [%]
† 1.5 Tons Per CU YD
2. Find Volume of Footings
2 [Feet]
[x] 24 [Inch]
[x] 12 [Inch] [=]
[Conv] [Yds]
[x] 5 [=]
0.148148 CU YD
0.740741 CU YD
3. Find the Weight of Concrete
[Conv] [Weight]
[Weight]
[Weight]
[Weight]
1.111111 Ton
1007.983 KG
0.
2 FT
24 IN
4 CU FT
2222.222 LB
1.008 M Ton
ee Appendix B for other geom et ri c shape form ul as.
* S
Continue pressing the [%] key if the units are not
†
shown as Tons/Yd³
User's Guide — 35
Board Feet/
Lumber Calculations
Board Feet and lumber problems can
easily be solved with the Construction
Master IV’s built-in Board Feet and
material estimating function.
Total Board Feet
With Dollar Cost
—
Find the total board feet for one each
of the following sizes:
2 x 4 x 14
2 x 10 x 16
2 x 12 x 18
In addition, if this board cost $250 per
Mbm., how much will this order cost?
Keystroke Display
[On/C] [On/C]
2 [x] 4 [x] 14 [BdFt] [M+]
2 [x] 10 [x] 16 [BdFt] [M+]
2 [x] 12 [x] 18 [BdFt] [M+]
[Rcl] [Rcl]
[x] 250 [Conv] [•]
36 — Construction Master IV
9.333333 B FT
26.66667 B FT
36 B FT
72 B FT
$ 18.00 Per
0.
Right-Triangle Calculations
The top row of keys provide you
with built-in solutions to right triangles. The solutions are available in any
of the linear dimensions offered on the
calculator. Thus, you can solve right
triangles directly in feet and inches,
decimal feet, meters, etc.
Any value of a right triangle can be
found given two of the four variables:
1) Rise, 2) Run, 3) Diagonal or 4)
Pitch.
Pitch is a permanent entry that can
be entered as th e Rise per foot (meter
for Metric Mo de), as an angle, or as a
ratio/percentage ([Conv] [Pitch]).
Right Triangle:
Pitch =
Rise
Run
Unit Rise
Unit Run
Diagonal
Pitch Angle
User's Guide — 37
Squaring a Concrete Slab
Assume you want to “square-up” the
forms for a concrete foundation measuring 45 feet 6 inches by 24 feet 4
inches. In order for the forms to be
square, what should the diagonal
measurements (Square-Up) be?
24’ 4”
45’ 6”
Keystroke Display
[On/C] [On/C]
1. Enter Sides as Rise/Run
45 [Feet] 6 [Inch][Run]
24 [Feet] 4 [Inch][Rise]
RUN 45 FT 6 IN
RISE 24 FT 4 IN
2. Find the Square Up (Diagonal)
[Diag]
38 — Construction Master IV
DIAG 51 FT 7-3/16 IN
0.
Back-Fill on a Slope
with Percent of Grade Known
You’ve built 55 linear feet of a threefoot high retaining wall 3 feet out
from the base of a 65% grade. You
plan to back-fill to within 12 inches of
the top of the wall (for a 2’ depth).
How many cubic yards of fill should
you have delivered?
?
3’
2’
A
3’
B
?
65%
Grade
Keystroke Display
[On/C] [On/C]
0.
1. Find Volume for “A”
55 [Feet]
[x] 3 [Feet]
[x] 2 [Feet] [=] [M+]
55 FT
3 FT
330 CU FT
2. Find Run/Diagonal of “B”
65 [%] [Conv][Pitch]
2 [Feet] [Rise]
[Run]
[Diag]
RUN 3 FT 0-15/16 IN
DIAG 3 FT 8-1/16 IN
PTCH 0.65
RISE 2 FT
User's Guide — 39
3. Find Volume of Triangle “B”
55 [Feet] 55 FT
[x] 3 [Feet] 15 [ / ] 16 3 FT 0-15/16 IN
[x] 2 [Feet] [=] 338.5938 CU FT
[÷] 2 [=] [M+] 169.2969 CU FT
4. Find Total Volume
[Rcl] [Rcl] 499.2969 CU FT
[Conv] [Yds] 18.49248 CU YD
Area f or Roofing Materials
You’re ordering roofing materials
for a roof with a 5/12 Pitch, an overall
span of 27 feet and a length of 34 feet
6 inches. How many squares, at 100
square feet each, are there?
Keystroke Display
[On/C] [On/C] 0.
1. Find Common Rafter Length
5 [Inch] [Pitch] PTCH 5 IN
27 [Feet] [÷] 2 [=] [Run] RUN 13 FT 6 IN
[Diag] DIAG 14 FT 7-1/2 IN
2. Find Area of One Side
[x] 34 [Feet] 6 [Inch] [=] 504.5625 SQ FT
3. Find Area of Both Sides
[x] 2 [=] 1009.125 SQ FT
4. Find Number of Squares
40 — Construction Master IV
[÷] 100 [Sq] [Feet][=] 10.09125 (squares)
Common Rafter Length
Pitch Known
— (
The roof you are working on has a
7/12 Pitch, with a span of 23 feet 6
inches. What length should you cut
the Common rafters (not counting the
overhang or ridge adjustments)?
Keystroke Display
[On/C] [On/C] 0.
7 [Inch] [Pitch] PTCH 7 IN
)
7/12 Pitch
23’ 6”
23 [Feet] 6 [Inch] [÷] 2 [=] 11 FT 9 IN
[Run] RUN 11 FT 9 IN
[Diag] DIAG 13 FT 7-1/4 IN
User's Guide — 41
Common Rafter— (
Pitch Unknown
)
You’re unsure of the roof pitch but
know the Rise is 6 feet 11-1/2 inches
and the Run is 14 feet 6 inches. Find
the Common rafter length. Then solve
for the Pitch.
Keystroke Display
[On/C] [On/C]
0.
Find Diagonal & Pitch
6 [Feet] 11 [Inch] 1 [ / ] 2
[Rise]
14 [Feet] 6 [Inch] [Run]
[Diag]
[Pitch]
[Pitch]
RISE 6 FT 11-1/2 IN
RUN 14 FT 6 IN
DIAG 16 FT 1 IN
PTCH 25.63565°
PTCH 5-3/4 IN
Note: If the Pitch is displayed in degrees, just press [Pitch] again to display the rise per unit run value.
42 — Construction Master IV
Finding Rise —
(
Pitch a nd Run Known
)
Though not commonly asked for,
you can compute the rise or run of a
right angle just as you would the diagonal. Find the rise given a 7/12
pitch and a run of 11 feet 6 inches:
Keystroke Display
[On/C] [On/C]
7 [Inch] [Pitch]
11 [Feet] 6 [Inch] [Run]
[Rise]
PTCH 7 IN
RUN 11 FT 6 IN
RISE 6 FT 8-1/2 IN
0.
Finding Rise & Diagonal —
(
Degrees of Pitch & Run Known
)
Find the Rise and Diagonal sides of
a right angle given a 30° Pitch and a
Run of 20 feet 5 inches:
Keystroke Display
[On/C] [On/C]
30 [Pitch]
20 [Feet] 5 [Inch] [Run]
[Rise]
[Diag]
PTCH 30°
RUN 20 FT 5 IN
RISE 11 FT 9-7/16 IN
DIAG 23 FT 6-7/8 IN
User's Guide — 43
0.
Raked Wall – Stud Sizes
Find each stud size in a raked wall
with a peak of 15 feet 5 inches, and a
length of 30 feet 7 inches. Use 16
inches as your on-center spacing.
Keystroke Display
[On/C] [On/C]
0.
Enter Rise, Run and O.C. Spaci ng
15 [Feet] 5 [Inch] [Rise]
30 [Feet] 7 [Inch] [Run]
16 [Inch][Conv] [Diag]
RISE 15 FT 5 IN
RUN 30 FT 7 IN
OC 16 IN
Find Stud Lengths
[Conv] [Diag]
[Diag]
[Diag]
[Diag]
[Diag]
RW 1 14 FT 8-15/16 IN
RW 2 14 FT 0-7/8 IN
RW 3 13 FT 4-13/16 IN
RW 4 12 FT 8-3/4 IN
RW 5 12 FT 0-11/16 IN
Etc......Continue pressing [Diag] until
last stud size or "0" is reached.
44 — Construction Master IV
Hip/Valley & Jack Rafters
The Construction Master IV uses the
rise, run, diagonal, pitch and o.c.
spacing values to compute regular
(45°) and irregular (non-45°) hip/
valley and jack rafter lengths (ex-
cluding wood thickness, etc.).
“Regular” Hip/Valley & Jack Rafters:
To solve for regular (45°) hip/valley
and jack rafter lengths, press [Hip/V]
and then [Jack]. Repeated presses of
[Jack] will compute all regular jack
rafters – from longest to shortest size.
“Irregular” Hip/Val l ey & Jack Rafters:
To solve for irregular (non-45°)
hip/valley and jack rafter lengths, enter the irregular pitch using [Conv]
[Hip/V] (
Press the [Hip/V] key again to find the
length of the irregular hip/valley rafter. Then press [Jack] to compute the
size of the longest irregular jack rafter
on the common pitch side. Successive
presses of [Jack ] will display each decreasing jack size.
10 [Inch] [Conv] [Hip/V]
User's Guide — 45
).
Additional presses of [Jack], once
“0” is reached, will cause your calculator to “revolve,” or display the rafter
sizes on the opposite side of the
hip/valley rafter (i.e., the Irregular
Pitch Side). Pressing [Conv] [Jack]
will start the display sequence using
the longest rafter size on the irregular
pitch side.
Irregular
Side
{I/Jack}
Hip Rafter
Common
Side
[Jack]
Jack Rafters
16”
When calculating regular and irregular jack rafter lengths, you will
see the letters “JK” (common pitch)
or “IJ” (irregular pitch) with the corresponding Jack number to the left of
your calculator display. This will enable you to keep track of the descending sizes, and which side the
corresponding rafter is based on.
46 — Construction Master IV
Regular (45°) Hip/Valley
& Jack Rafters
You’re working with a 7/12 Pitch,
and half your total span is 13 feet 9
inches: (A) Find the point-to-point
length for the common rafter; (B) Find
the length of an adjoining hip (or valley) and; (C) Find the lengths of the
regular jack rafters (j ack rafters at 16”
on-center spacing).
Keystroke Display
[On/C] [On/C]
0.
1. Find Common Rafter Length
13 [Feet] 9 [Inch] [Run]
7 [Inch] [Pitch]
[Diag]
RUN 13 FT 9 IN
PTCH 7 IN
DIAG 15 FT 11 IN
2. Find Hip Rafter Length
[Hip/V]
H/V 21 FT 0-7/16 IN
3. Find Jack Rafter Lengths
16 [Inch] [Jack]
[Jack]
[Jack]
[Jack]
Etc......Continue pressing [Jack] until last Jack
is reached or until display shows “0.”
JK1 14 FT 4-1/2 IN
JK2 12 FT 10 IN
JK3 11 FT 3-7/16 IN
OC 16 IN
User's Guide — 47
Jack Rafters — (
with ot her
than 16 inch on-center spacing
)
You’re working with a roof having a
7/12 pitch and a run of 30 feet 9
inches. Find the jack rafter lengths at
18 inch on-center spacing.
Keystroke Display
[On/C] [On/C]
0.
1. Enter Pitch, Run and Spacing
7 [Inch] [Pitch]
30 [Feet] 9 [Inch] Run]
18 [Inch] [Jack]
* OC 18 IN
PTCH 7 IN
RUN 30 FT 9 IN
2. Find Jack Rafter Lengths
[Jack]
[Jack]
[Jack]
JK1 33 FT 10-3/8 IN
JK2 32 FT 1-1/2 IN
JK3 30 FT 4-11/16 IN
Etc......Continue pressing [Jack] until last Jack
is reached or until display shows “0.”
If the entered value is not dimensioned, the calcula-
*
tor will assu me the value as in ches for Englis h and
millimeters for Metric calculations.
48 — Construction Master IV
Irregular (non-45° ) Hip/Val ley
& Jack Rafters
You’re working with a 7/12 pitch and
half your overall span is 15 feet 7
inches. The irregular pitch is 8/12:
(A) Find the point-to-point length for the com-
mon rafter;
(B) Find the length of the adjoining “irregular”
hip (or valley);
(C) Find the jack lengths on the “irregular”
pitch side (16” o.c. spacing);
(D) Find the jack lengths on the “regular” pitch
side (16” o.c. spacing).
Keystroke Display
[On/C] [On/C]
0.
1. Find Common Rafter Length
7 [Inch] [Pitch]
15 [Feet] 7 [Inch][Run]
[Diag]
DIAG 18 FT 0-1/2 IN
PTCH 7 IN
RUN 15 FT 7 IN
2. Find Irregular Hip Rafter Length
8 [Inch] [Conv][Hip/V]
[Hip/V]
IH/V 22 FT 7-3/8 IN
IPCH 8 IN
User's Guide — 49
3. Find Irregular Jack Lengths
16 [Inch] [Conv] [Jack] OC 16 IN
[Conv] [Jack] IJ1 14 FT 11-13/16 IN
[Jack] * IJ2 13 FT 7 IN
[Jack] IJ3 12 FT 2-3/16 IN
[Jack] IJ4 10 FT 9-3/8 IN
[Jack] IJ5 9 FT 4-1/2 IN
Etc......Continue pressing [Jack] until last regu-
lar jack or “0.” is reached.
4. Find Regular Jack Lengths
16 [Inch] [Jack] OC 16 IN
[Jack] JK1 16 FT 3-5/16 IN
[Jack] JK2 14 FT 6-1/8 IN
[Jack] JK3 12 FT 9 IN
[Jack] JK4 10 FT 11-13/16 IN
[Jack] JK5 9 FT 2-5/8 IN
Etc......Continue pressing [Jack] until last regu-
lar jack or “0.” is reached.
* It is not necessary to keep on pressing [Conv] when
displaying the Irregular Jack sizes.
50 — Construction Master IV
Stair Problems (Risers/Treads)
The Construction Master IV easily
computes the various values pertaining to stair building. Given values for
total rise, total run and a desired stair
riser height, your calculator will compute the following with the press of
the [Stair] key:
1) Number of Risers
2) Riser Height
3) Underage/Overage for Risers
4) Number of Treads
5) Tread Width
6) Underage/Overage for Treads
7) Stringer (Carriage) Length
8) Inclination Angle
Floor
to
Floor
Height
Stringer
Tread
Width
Riser Height
Inclination
Angle
Total Run
User's Guide — 51
The desired stair riser height (default
= 7-1/2) inches can be permanently
revised by entering the new height and
pressing [Stair].
Risers Only — Custom Height
You’re building an access stairway
for a client who can’t handle conventional-height risers. If the total rise is 3
feet 8-3/4 inches and your desired
riser height is approximately 5-1/2
inches, find the number of stair risers,
actual riser height, and any underage
or overage remaining.
Keystroke Display
[On/C] [On/C]
0.
1. Enter Rise and Riser Height
3 [Feet] 8 [Inch]
3 [ / ] 4 [Rise]
5 [Inch] 1[ / ] 2 [Stair]
RISE 3 FT 8-3/4 IN
R-HT 5-1/2 IN
2. Find Stair Values
[Stair]
[Stair]
[Stair]
[Conv] [x]
(Optional)
R–SZ 5-5/8 IN
R+/– – 0-1/4 IN
*0.
RSRS 8
* An ALL CLEAR is performed here to set the calcu-
lator to its default settings.
52 — Construction Master IV
Risers & Treads —
(
7-1/2 Inch Desired Riser Height
)
You need to build a stairway having
a floor to floor height of 28 feet 5-1/2
inches, a run of 35 feet 6 inches and a
nominal riser height of 7-1/2 inches
(default). Find the number of risers,
the riser height and underage/overage,
the number of treads, the tread width
and underage/ overage, stringer length
and inclination angle.
Keystroke Display
[On/C] [On/C]
0.
1. Enter Rise and Run
28 [Feet] 5 [Inch] 1 [ / ] 2
[Rise]
RISE 28 FT 5-1/2 IN
35 [Feet] 6 [Inch] [Run]
2. Find Stair Values
[Rcl] [Stair]
[Stair]
[Stair]
[Stair]
[Stair]
[Stair]
[Stair]
[Stair]
[Stair]
RUN 35 FT 6 IN
R-HT 7-1/2 IN
RSRS 46
R-SZ 7-7/16 IN
R+/– 0-5/8 IN
TRDS 45
T-SZ 9-7/16 IN
T+/– –1-5/16 IN
STRG 45 FT 1-3/8 IN
INC° 38.10298
User's Guide — 53
Circle Problems
Circumference and Area
Find the ci rcumference an d area of a
circle having a diameter of 10 inches.
Keystroke Display
[On/C] [On/C]
10 [Inch] [Circ]
[Circ]
[Circ]
[Inch]
DIA 10 IN
AREA 78.53982 SQ IN
CIRC 31-7/16 IN
31.41593 INCH
0.
Arc Lengt hs
Find the arc length of an 85° portion
of a circle with a 5 foot diameter.
Keystroke Display
[On/C] [On/C]
5 [Feet] [Circ]
85 [Conv] [Circ]
[Feet]
5 FT 0 IN DIA
3 FT 8-1/2 IN ARC
3.708825 FT
0.
54 — Construction Master IV
A
PPENDIX
A
Accuracy/Errors
Accuracy/Display Capacity — Your
calculator has an eleven digit display
made up of seven digits (normal display) and four fractional digits. Each
calculation is carried out internally to
10 digits.
Errors — When an incorrect entry is
made, or the answer is beyond the
range of the calculator, it will display
the word “Error.” To clear an error
condition you must hit the [On/C]
button twice. At this point you must
determine what caused the error and
re-key the problem.
Auto-Range — If an “overflow” is
created because of an input and calculation with small units that are out
of the standard 7-digit range of the
display, the answer will be automatically expressed in the next larger units
(instead of showing “Error”) — i.e.,
10,000,000mm is shown as 10,000m.
Also applies to inches, feet and yards.
User's Guide — 55
Battery & Auto S hut-Off
Your calculator is powered by a single
3-Volt Lithium CR-2032 battery. This
should last upwards of 800 hours of
actual use (1 year plus for most people). Should the display become very
dim or erratic, replace the battery.
*
Your calculator is designed to shut
itself off after about 8-12 minutes of
non-use.
Default Va lues
After a Full Reset/All-Clear, the calculator will return to the following
settings:
Setting Imperial Metric
Stair Riser Height 7-1/2 Inch 185 mm
Raked Wall o.c. 16 Inch 600 mm
Jack o.c. 16 Inch 600 mm
Irregular Jack o.c. 16 Inch 600 mm
Weight per Vol. 1.5 Tons/Yd3 1775 kg/M3
Fractional Setting 1/16 1/16
Fractional Mode Normal Normal
* WARNING: Please use caution when disposing of
your old batteries as they contain hazardous chemicals.
56 — Construction Master IV
A
g
g
b
PPENDIX
B
Area Formulas
a
Square
Rectan
Area = lw
1
2
2
2
le
a
w
l
a
b
r
Area = a
Trian
le
Are a = a b
Circle
Circum feren ce = 2πr
Area = πr
Ellipse
b
a
Area = πa
User's Guide — 57
Surface Area & Volume Formulas
g
p
y
a
a
a
l
w
h
Cube
Surface area = 6a
Volume = a
3
Rectan
le
Surface area =
2hw + 2hl + 2lw
2
Volume = l x w x h
Cone
h
Surface area = πr r + h
2
r
(+πr if you add the base)
Volume = πr h
2
2 2
3
here
S
Surface area = 4πr
r
r
Volu m e = πr
linder
C
Surface area = 2πrh + 2πr
h
Volume = πr h
58 — Construction Master IV
2
3
4
3
2
2
W
ARRANTY
Warranty Repair Service – U.S.A.
Calculated Industries, Inc. ("CII") warrants this product against d efects in materials and workmanship for a period of one
(1) year from the dat e of o riginal consumer
purchase in the U.S. If a defect exists during the warranty period, CII at its option
will either repair (using new or
remanufactured parts) or replace (with a
new or remanufactured unit) the product at
no charge.
THE WARRANTY WILL NOT APPLY
TO THE PRODUCT IF IT HAS BEEN
DAMAGED BY MISUSE,
ALTERATION, ACCIDENT, IMPROPER
HANDLING OR OPERATION, OR IF
UNAUTHORIZED REPAIRS ARE
ATTEMPTED OR MADE. SOME
EXAMPLES OF DAMAGES NOT
COVERED BY WARRANTY INCLUDE,
BUT ARE NOT LIMITED TO,
BATTERY LEAKAGE, BENDING, OR
VISIBLE CRACKING OF THE LCD,
WHICH ARE PRESUMED TO BE
DAMAGES RESULTING FROM
MISUSE OR ABUSE.
To obtain warranty service in the U.S.,
ship the product postage paid to the CII
Authorized Service Provider listed on the
back page of the User’s Guide. Please pro-
User's Guide — 59
vide an explanation of the service requirement, your name, address, d ay phone number and dated proof of purchase (typically a
sales receipt). If the product is over 90 days
old, include payment of $6.95 for return
shipping and handling within the contiguous 48 states. (Outside the contiguous 48
states, please call CII for return shipping
costs.)
A repaired or replacement product assumes th e remaining warra nty of t he original product or 90 days, whichever is longer
Non-Warranty Repair Service – U.S.A.
Non-warranty repair covers service beyond the warranty period or service requested due t o damage resulting f rom misuse or abuse. Contact the C II Authorized
Service Provider listed on t he back page of
the User’s Guide to obtain current product
repair information and charges. Repairs are
guaranteed for 90 days.
Repair Service – Outside the U.S.A.
Not all countries have CII Authorized
Service Providers o r the same warranty and
servic e po lic ie s . To obt a in warr a nt y o r n onwarranty repair service for goods purchased outside the U.S ., contact the dealer
through which you initially purchased the
product. If you cannot reaso nably have the
60 — Construction Master IV
product repaired in your area, you may
contact CII to obt ain current prod uct repair
information and charges, including freight
and du t ies.
Disclaimer
CII MAKES NO WARRANTY OR
REPRESENTATION, EITHER EXPRESS
OR IMPLIED, WITH RESPECT TO THE
PRODUCT’S QUALITY,
PERFORMANCE,
MERCHANTABILITY, OR FITNESS
FOR A PARTICULAR PURPOSE. AS A
RESULT, THIS PRODUCT, INCLUDING
BUT NOT LIMITED TO, KEYSTROKE
PROCEDURES, MATHEMATICAL
ACCURACY AND PREPROGRAMMED
MATERIAL, IS SOLD "AS IS," AND
YOU THE PURCHASER ASSUME THE
ENTIRE RISK AS TO ITS QUALITY
AND PERFORMANCE.
IN NO EVENT WILL CI I BE LIABLE
FOR DIRECT, INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL
DAMAGES RESULTING FROM ANY
DEFECT IN THE PRODUCT OR ITS
DOCUMENTATION.
The warranty, disclaimer, and remedies
set forth above are exclusive and replace all
others, oral or written, expressed or implied. No CII dealer, agent , or employee is
authorized to make any modification, ex-
User's Guide — 61
tension, or addi tion to this warranty.
Some states do not allow the exclusion or
limitation of implied warranties or liability
for incidental or consequent ial damages, so
the above limitation or exclusion may not
apply to you. This warranty gives you specific rights, and you may also have other
rights which vary from state to state.
FCC Class B
This equipment has been certified to comply with the limits for a Class B co mputing
device, pursuant to Subpart J of Part 1 5 of
FCC rules.
62 — Construction Master IV
Looking For New Ideas
Calculated Industries, a leading
manufacturer of special function calculators and digital measuring instruments, is always looking for new product ideas in these areas.
If you have one, or if you have any
suggestions for improvements to this
product or its User’s Guide, please
call or write our Product Development
Department. Thank you.
User's Guide — 63
Calculated Indust ries, Inc.
4840 Hytech Drive
Carson City, NV 89706 U.S.A
775/885-4975 • Fax: 775/885-4949
E-mail: t echsup@cal cul ated.com
http://www.calculated.com
64 — Construction Master IV
Software copyright ed and l i censed to
Calculated Industri es by
Construction Master Technol ogi es, LLC,
1999
Construction Master IV User’s Guide
Copyrighted by Calculat ed I ndust ri es,
1999
Construction Master® and
Calculated Industri es® are
registered trademarks
of Calculated I ndust ri es, Inc.
ALL RIGHTS RESERVED
Designed in the
United States of Am erica
Printed in China
Manual 4045-MN-B
.
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