Calculated Industries Construction Master IV Operation & User’s Manual

Calculated Industries by Construction Master Technologies, LLC, 2003 Construction Master IV User’s Guide Copyrighted by Calculated Industries, 2003 Construction Master® and Calculated Industries® are registered trademarks of Calculated Industries, Inc. ALL RIGHTS RESERVED. Designed in the United States of America Printed in China UG4045E-B 4/03

Table of Contents The Construction Master® IV..........2 GETTING STARTED..........................4 Key Definitions/Functions...............4 Fractional Settings .......................12 Entering Dimensions ....................13 Basic Math Operations.................16 Percentage Calculations ..............18 Memory Operation........................18 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 .........33 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 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!

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.

[Conv] [ ] — x2 Function 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. 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. [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). 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 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. [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.

[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 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 unless a new on-center spacing is entered (e.g., 19.2 [Inch] [Conv] [Jack]). 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:

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. 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 de- faults. Note: Will not change the Im- perial/Metric mode setting. [Rcl] [x] changes this setting. [Conv] [ + ] — Pi (ππππ) 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 mate- rial cost given a unit dimension and 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 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 1/16 [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 star (
) will appear in the bottom left 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 press- ing [Rcl] [ / ]. Entering Dimensions Linear Dimensions When entering feet-inch values, en- ter dimensions from largest to smallest — feet before inches, inches before fractions. Enter fractions by entering 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 Dimen- sions Examples of how square and cubic dimensions are entered: Dimension Keystrokes 5 Cubic Yards 5 [Cu] [Yds] 130 Square Feet 130 [Sq] [Feet] 33 Square Meters 33 [Sq] [m]

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 [Yds] * 1.555556 SQ YD [m] 1.300643 SQ M [mm] 1300643 SQ MM [cm] 13006.43 SQ CM * When performing conversions, [Conv] only has to be pressed once.

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 [mm] * 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 This feature also makes the calculator simple to use for dimensional applica- tions: * 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).

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 6- 1/2 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 deter- mines the answer format. [Conv] can be used to change to any format desired, pro- vided convention is maintained.

Percentage Calculations 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 dimen- sion (feet, inch, millimeter, etc) and any type of convention (non- dimensioned, linear, square or cubic). 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+] key is pressed, the displayed value will be added to 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+] Memory is semi-permanent, clearing only when you: 1) turn off the calculator; 2) press [Rcl] [Rcl]; 3) press [Conv] [Rcl]; 4) press [Conv] [x] (all clear). Examples/Keystroke Display 355 [M+] 355. M 255 [M+] 255. M 745 [Conv] [M+] 745. M [Rcl] [Rcl] – 135. 10 [Feet] 5 [Inch] [M+] 10 FT 5 IN M 5 [Feet] 3 [Inch] [M+] 5 FT 3 IN M [Rcl] [Rcl] 15 FT 8 IN

Paperless Tape The Paperless Tape allows the user to display and review the last 20 entries of a calculation. [Rcl] [=] accesses the tape mode and [+] or [–] scrolls for- ward or backward through the entries. While in the Paperless Tape mode, the display will show the entered or calcu- lated 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 [=] has been used in the middle of a string, SUB (for Subtotal) will display in the upper left. If [=] was the last opera- tion 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.

Previewing Paperless Tape Keystroke Display 1. Enter a string of numbers: 4 [Feet] [+] 4 FT 0 IN 5 [Feet] [+] 9 FT 0 IN 6 [Feet] [+] 15 FT 0 IN 7 [Feet] [=] 22 FT 0 IN 2. Access the Tape function: [Rcl] [=] TTL= 22 FT 0 IN 3. Scroll from first value to total: [+] 01 4 FT 0 IN [+] 02+ 5 FT 0 IN [+] 03+ 6 FT 0 IN [+] 04+ 7 FT 0 IN [+] TTL= 22 FT 0 IN 4. Scroll to last 2 values: [–] 04+ 7 FT 0 IN [–] 03+ 6 FT 0 IN 5.Exit Tape function and continue: [=] * TTL= 22 FT 0 IN [+] 22 FT 0 IN 2 [Feet] [=] 24 FT 0 IN * Can press any key besides [Off], [+] or [–].

EXAMPLES Linear Calculations Cutting Boards How many 2 feet 2 inch pieces can be made from fifteen 10-foot boards? Keystroke Display 1. Divide board length by smaller cuts [On/C] [On/C] 0. 10 [Feet] 10 FT [÷] 2 [Feet] 2 [Inch] [=] 4.615385 (or 4 whole boards) 2. Find total boards 4 [x] 15 [=] 60 (pieces) Carpentry — Calculating Number of Studs Find the number of 16-inch on-center studs needed for an 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 18 FT 7-1/2 IN [÷] 16 [Inch] [=] 13.96875 (14 studs) 2. Add one for the end [+] 1 [=] 14.96875 (15 studs) 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] 0. 3 [Inch] 3[ / ] 4 [x] 8 [Inch] [=] 30 SQ IN 2. Store in Memory and Find Wall Area [M+] 30 SQ IN 36.5 [Feet] [x] 8 [Feet] [=] 292 SQ FT 3. Divide by brick area to find total bricks [÷] [Rcl] [M+] [=] 1401.6 (Bricks) 4. Add 5% for spoilage [+] 5 [%] 1471.68 (1472 Bricks)

Area Calculations Area of a Rectangle What is the area of a room measuring 12 feet 6 inches by 15 feet 8 inches? Keystroke Display [On/C] [On/C] 0. 12 [Feet] 6 [Inch] 12 FT 6 IN [x] 15 [Feet] 8 [Inch] [=] 195.8333 SQ FT 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] 0. 4 [Feet] 7 [Inch] 4 FT 7 IN [Conv][ ] 21.00694 SQ FT

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] 0. 1. Find Area of Room 1 & Add to Mem- ory 12 [Feet] 4 [Inch] 12 FT 4 IN [x] 10 [Feet] [=] [M+] 123.3333 SQ FT Enter in Memory 2. Find Area of Room 2 & Add to Mem- ory 14 [Feet] 8 [Inch] 14 FT 8 IN [x] 16 [Feet] [=] [M+] 234.6667 SQ FT 3. Find Total Area and Cost [Rcl] [Rcl] [Conv] [Yds] 39.77778 SQ YD [x] 11.75 [Conv] [•] $467.39

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] 0. 5 [Inch] [x] 36 [Inch] [=] 180 SQ IN [M+] 180 SQ IN 2. Find Total Shingles Required 1745 [Sq] [Feet] 1745 SQ FT [÷] [Rcl] [Rcl] [=] 1396 (shingles) 3. Add 10% for waste [+] 10 [%] 1535.6 (1536 shingles)

Volume Calculations Rectangular 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] 0. 3 [Feet] 3 FT [x] 1 [Feet] 9 [Inch] 5 [ / ] 8 1 FT 9-5/8 IN [x] 2 [Feet] 4 [Inch] [=] 12.61458 CU FT Simple Concrete Volume You’re going to form up and pour your own driveway and you need to accu- rately calculate the cubic yards of con- crete required for the job. The meas- urements 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] 0. 1. Find Volume 36 [Feet] 3 [Inch] 38 FT 3 IN [x] 11 [Feet] 6 [Inch] 11 FT 6 IN [x] 4 [Inch] [=] 138.9583 CU FT (Cont’d)

Keystroke Display [Conv] [Yds] 5.146605 CU YD 2. Multiply by Cost [x] 55 [Conv] [•] $ 283.06 Per 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 con- crete will you need for all five col- umns? Keystroke Display [On/C] [On/C] 0. 1. Find Surface Area of Column 3 [Feet] 4 [Inch] 1 [ / ] 2 3 FT 4-1/2 IN [Circ] [Circ] AREA 8.946176 SQ FT 2. Find Total Volume [x] 11 [Feet] 6 [Inch] [=] 102.881 CU FT [Conv] [Yds] 3.810408 CU YD [x] 5 [=] 19.05204 CU YD

Complex Concrete Volume You’re going to pour an odd-shaped patio 4-1/2 inches deep with the di- mensions shown below. First, calculate the total area (by dividing the drawing into three individual rectangles) and then determine the total yards of con- crete required for this job. 38’ 2” 27’ 0” 4’ 2” 8’ 6” 9’ 0” 9’ 6” A C B

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

Volume/Weight Calculations Concrete Footing Find the total volume* of concrete re- quired 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] 0. 1. Enter Weight Per Volume 1.5 [Conv] [%] **1.5 Tons Per CU YD 2. Find Volume of Footings 2 [Feet] 2 FT [x] 24 [Inch] 24 IN [x] 12 [Inch] [=] 4 CU FT [Conv] [Yds] 0.148148 CU YD [x] 5 [=] 0.740741 CU YD 3. Find the Weight of Concrete [Conv] [Weight] 1.111111 Ton [Weight] 2222.222 LB [Weight] 1.008 M Ton [Weight] 1007.983 KG * See Appendix B for other geometric shape formulas. ** Continue pressing the [%] key if the units are not shown as Tons/Yd³

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] 0. 2 [x] 4 [x] 14 [BdFt] [M+] 9.333333 B FT 2 [x] 10 [x] 16 [BdFt] [M+] 26.66667 B FT 2 [x] 12 [x] 18 [BdFt] [M+] 36 B FT [Rcl] [Rcl] 72 B FT [x] 250 [Conv] [•] $ 18.00 Per

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 calcu- lator. Thus, you can solve right trian- gles directly in feet and inches, deci- mal 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 the Rise per foot (meter for Metric Mode), as an angle, or as a ratio/percentage ([Conv] [Pitch]). Right Triangle:

Squaring a Concrete Slab Assume you want to “square-up” the forms for a concrete foundation meas- uring 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] 0. 1. Enter Sides as Rise/Run 45 [Feet] 6 [Inch] [Run] RUN 45 FT 6 IN 24 [Feet] 4 [Inch] [Rise] RISE 24 FT 4 IN 2. Find the Square Up (Diagonal) [Diag] DIAG 51 FT 7-3/16 IN

Area for 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 [÷] 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 Com- mon rafters (not counting the overhang or ridge adjustments)? 7/12 Pitch 23’ 6” Keystroke Display [On/C] [On/C] 0. 7 [Inch] [Pitch] PTCH 7 IN 23 [Feet] 6 [Inch] [÷] 2 [=] 11 FT 9 IN [Run] RUN 11 FT 9 IN [Diag] DIAG 13 FT 7-1/4 IN

Finding Rise — (Pitch and 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] 0. 7 [Inch] [Pitch] PTCH 7 IN 11 [Feet] 6 [Inch] [Run] RUN 11 FT 6 IN [Rise] RISE 6 FT 8-1/2 IN 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] 0. 30 [Pitch] PTCH 30° 20 [Feet] 5 [Inch] [Run] RUN 20 FT 5 IN [Rise] RISE 11 FT 9-7/16 IN [Diag] DIAG 23 FT 6-7/8 IN

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. 1. Enter Rise, Run and O.C. Spacing 15 [Feet] 5 [Inch] [Rise] RISE 15 FT 5 IN 30 [Feet] 7 [Inch] [Run] RUN 30 FT 7 IN 16 [Inch] [Conv] [Diag] OC 16 IN 2. Find Stud Lengths [Conv] [Diag] RW 1 14 FT 8-15/16 IN [Diag] RW 2 14 FT 0-7/8 IN [Diag] RW 3 13 FT 4-13/16 IN [Diag] RW 4 12 FT 8-3/4 IN [Diag] RW 5 12 FT 0-11/16 IN Etc......Continue pressing [Diag] until last stud size or "0" is reached.

Hip/Valley & Jack Rafters 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 (jack rafters at 16” on-center spacing). Keystroke Display [On/C] [On/C] 0. 1. Find Common Rafter Length 13 [Feet] 9 [Inch] [Run] RUN 13 FT 9 IN 7 [Inch] [Pitch] PTCH 7 IN [Diag] 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] OC 16 IN [Jack] JK1 14 FT 4-1/2 IN [Jack] JK2 12 FT 10 IN [Jack] JK3 11 FT 3-7/16 IN Etc......Continue pressing [Jack] until last Jack is reached or until display shows “0.”

Jack Rafters — (with other 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] PTCH 7 IN 30 [Feet] 9 [Inch] [Run] RUN 30 FT 9 IN 18 [Inch] [Jack]* OC 18 IN 2. Find Jack Rafter Lengths [Jack] JK1 33 FT 10-3/8 IN [Jack] JK2 32 FT 1-1/2 IN [Jack] 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 calculator will assume the value as inches for English and millimeters for Metric calcu- lations.

Irregular (non-45°) Hip/Valley & 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. Find the common rafter length, irregular hip/valley and jack rafter lengths. Keystroke Display [On/C] [On/C] 0. 1. Find Common Rafter Length 7 [Inch] [Pitch] PTCH 7 IN 15 [Feet] 7 [Inch][Run] RUN 15 FT 7 IN [Diag] DIAG 18 FT 0-1/2 IN 2. Find Irregular Hip Rafter Length 8 [Inch] [Conv] [Hip/V] IPCH 8 IN [Hip/V] IH/V 22 FT 7-3/8 IN 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 regular jack or “0.” is reached. * It is not necessary to keep on pressing [Conv] when displaying the Irregular Jack sizes.

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 regular jack or “0.” is reached.

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

The desired stair riser height (default = 7-1/2) inches can be permanently re- vised 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] RISE 3 FT 8-3/4 IN 5 [Inch] 1[ / ] 2 [Stair] R-HT 5-1/2 IN 2. Find Stair Values [Stair] RSRS 8 [Stair] R–SZ 5-5/8 IN [Stair] R+/– – 0-1/4 IN [Conv] [x] (Optional) * 0. * An ALL CLEAR is performed here to set the calculator to its default settings.

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] RUN 35 FT 6 IN 2. Find Stair Values [Rcl] [Stair] R-HT 7-1/2 IN [Stair] RSRS 46 [Stair] R-SZ 7-7/16 IN [Stair] R+/– 0-5/8 IN [Stair] TRDS 45 [Stair] T-SZ 9-7/16 IN [Stair] T+/– –1-5/16 IN [Stair] STRG 45 FT 1-3/8 IN [Stair] INC° 38.10298

Circle Problems Circumference and Area Find the circumference and area of a circle having a diameter of 10 inches. Keystroke Display [On/C] [On/C] 0. 10 [Inch] [Circ] DIA 10 IN [Circ] AREA 78.53982 SQ IN [Circ] CIRC 31-7/16 IN [Inch] 31.41593 IN Arc Lengths Find the arc length of an 85° portion of a circle with a 5-foot diameter. Keystroke Display [On/C] [On/C] 0. 5 [Feet] [Circ] 5 FT 0 IN DIA 85 [Conv] [Circ] 3 FT 8-1/2 IN ARC [Feet] 3.708825 FT

APPENDIX A Battery & Auto Shut-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 peo- ple). 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 Values After a Full Reset/All-Clear, the calc- ulator will return to the following settings: Setting Imperial Metric Stair Riser Ht 7-1/2 Inch 185 mm R/Wall o.c. 16 Inch 600 mm Jack o.c. 16 Inch 600 mm IR/Jack o.c. 16 Inch 600 mm Wt per Vol. 1.5 Tons/Yd3 1775 kg/M3 Fractional Setting 1/16 1/16 Fractional Mode Normal Normal * WARNING: Please use caution when dis- posing of your old batteries as they contain hazardous chemicals.

APPENDIX B Area Formulas w l Rectangle Area = lw b a Triangle Area = ab 1 2 Square Area = a a a 2 r Circle Circumference = 2πr Area = πr2 b a Ellipse Area = πab

Surface Area & Volume Formulas w l Rectangle Surface area = 2hw + 2hl + 2lw Volume = l x w x h h Sphere Surface area = 4πr Volume = πr r 2 4 3 3 Cone Surface area = πr r + h (+πr if you add the base) Volume = πr h r h 2 2 2 2 3 Cylinder Surface area = 2πrh + 2πr Volume = πr h r h 2 2 a Cube Surface area = 6a Volume = a 2 3 a a

REPAIR AND RETURN Warranty, Repair and Return Information Return Guidelines: 1. Please read the Warranty in this User's Guide to determine if your Calculated In- dustries calculator, measuring device or electronic tool remains under warranty be- fore calling or returning any device for evaluation or repairs. 2. If your calculator won't turn on try pressing the "Reset Button" first. If it still won't turn on, check the batteries as outlined in the User's Guide. 3. If there is a black spot on the LCD screen, THIS IS NOT A WARRANTY DEFECT. The unit can be repaired. Call for a repair quote before returning your unit. 4. If you need more assistance, please go to our website at www.calculated.com and click on Support, then Repair Services FAQs. 5. If you believe you need to return your calculator, please speak to a Calculated Industries representative for additional information! Call Toll Free: 1-800-854-8075

WARRANTY Warranty Repair Service – U.S.A. Calculated Industries, Inc. ("CI") warrants this product against defects in materials and workman- ship for a period of one (1) year from the date of original consumer purchase in the U.S. If a defect exists during the warranty period, CI 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 MIS- USE, ALTERATION, ACCIDENT, IMPROPER HANDLING OR OPERATION, OR IF UNAUTHOR- IZED REPAIRS ARE ATTEMPTED OR MADE. SOME EXAMPLES OF DAMAGES NOT COVERED BY WARRANTY INCLUDE, BUT ARE NOT LIM- ITED 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 CI Authorized Service Provider listed on the back page of the User’s Guide. Please provide an explanation of the ser- vice requirement, your name, address, day 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 CI for return shipping costs.) A repaired or replacement product assumes the remaining warranty of the 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 to dam- age resulting from misuse or abuse. Contact the CI Authorized Service Provider listed on the back page of the User’s Guide to obtain current product repair information and charges. Repairs are guaran- teed for 90 days. Repair Service – Outside the U.S.A. Not all countries have CI Authorized Service Pro- viders or the same warranty and service policies. To obtain warranty or non-warranty repair service for goods purchased outside the U.S., contact the dealer through which you initially purchased the product. If you cannot reasonably have the product repaired in your area, you may contact CI to obtain current product repair information and charges, including freight and duties. Disclaimer CI MAKES NO WARRANTY OR REPRESENTA- TION, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THE PRODUCT’S QUALITY, PER- FORMANCE, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE. AS A RESULT, THIS PRODUCT, INCLUDING BUT NOT LIMITED TO, KEYSTROKE PROCEDURES, MATHEMATI- CAL ACCURACY AND PREPROGRAMMED MA- TERIAL, IS SOLD "AS IS," AND YOU THE PUR- CHASER ASSUME THE ENTIRE RISK AS TO ITS QUALITY AND PERFORMANCE. IN NO EVENT WILL CI BE LIABLE FOR DI- RECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECT IN THE PRODUCT OR ITS DOCU- MENTATION. The warranty, disclaimer, and remedies set forth above are exclusive and replace all others, oral or written, expressed or implied. No CI dealer, agent,

or employee is authorized to make any modification, extension, or addition to this warranty. Some states do not allow the exclusion or limita- tion of implied warranties or liability for incidental or consequential 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 computing device, pursuant to Subpart J of Part 15 of FCC rules. Calculated Industries, Inc. 4840 Hytech Drive Carson City, NV 89706 U.S.A 1-775-885-4900 • Fax: 1-775-885-4949 E-mail: [email protected] http://www.calculated.com