CONSTRUCTION MASTER IV ® For Today’s Construction Professional User’s Guide
INTRODUCING: THE CONSTRUCTION MASTER IV ® Designed for busy construction professionals, the new Construction Master IV lets you solve hundreds of dimension-related problems quickly and accurately in Metric or feet-inch formats! ◆ Solve Dimensional Math with Ease ◆ Instant Dimensional Conversions ◆ Complete Metric/Imperial Conversions ◆ Calculate Square and Rectangular Areas ◆ Find Cubic Volumes ◆ Solve Right-Triangle problems ◆ Find Regular and Irregular Hip/Valley Rafters ◆ Find Regular and Irregular Jac
GETTING STARTED KEY DEFINITIONS/FUNCTIONS Basic Functions [+] [–] [x] [÷] [=] Arithmetic operation keys. [%] Four-function percent key. 0–9 Digits used for keying-in numbers. [•] Decimal point. [Off ] Turns all power off. Resets the display and all non-permanent registers. [On/C] Turns on power. Pressing once clears the last entry and the display. Pressing twice in succession clears all temporary registers. [Conv] Used to convert between dimensions.
[ ] Used to find the square root of a number. [Conv] [ ] x2 — Finds the square of the displayed value. [M+] Memory Plus — Stores the displayed number in the semi-permanent Memory. Also adds the displayed number to any previously stored value in Memory. The total stored in Memory is recalled by pressing [Rcl] prior to [M+]. [Conv] [M+] Memory Minus (M–) — Subtracts the displayed value from Memory. [Rcl] Recall — Recalls values stored in any register (i.e.
****************************************** [Rcl] [x] Imperial/Metric Mode — Selects either Imperial or Metric defaults for the following settings: pitch, stair riser height, and on-center spacing for jack rafters and rake-walls. Note: This is a permanent setting cleared only by removing batteries or manually resetting. ****************************************** [Conv] [Rcl] Memory Clear — Clears the Memory without changing the current display.
[Inch] Inches — This is an entry and conversion key (when used with [Conv]). This key can also be used in conjunction with the [/] key for entering values in Fractional Inch format. [/] Fraction Bar — This key is used to enter fractions. For example, to enter 1/2, the key sequence would be: 1 [/] 2. [Cu] Cubic — This key is used with a dimension key to identify a value as being a volume. Example: 5 [Cu] [Yds]. [Sq] Square — This key is used with a dimension key to identify a value as being an area.
[mm] Millimeters — Entry and conversion key for millimeters. Operates the same as metric. [Bd Ft] Board Feet — This key is used to enter or convert cubic values to board feet (using [Conv]). One board foot is equal to 144 cubic inches (1 inch x 1 foot x 1 foot). [Weight] Weight — This key is used to convert volume to a weight value using the [Conv] key and the stored Weight per Volume factor (see below). Press repeatedly to toggle between tons, pounds and kilograms.
Right Triangle/Rafter Keys [Pitch] Pitch — This key is used to permanently enter or calculate the pitch (slope) of a roof (or right triangle). Pitch may be entered as an inch format (9 [Inch] [Pitch]), or as an angle in degrees (i.e., 30 [Pitch] for 30°), or also as a unitless ratio (0.75 [Conv] [Pitch]). [Rise] Rise — This key enters or calculates the rise or vertical leg of a right triangle. [Run] Run — This key enters or calculates the run or horizontal leg (or base) of a right triangle.
[Diag] Diagonal — This key enters or calculates the diagonal leg or hypotenuse of a right triangle. [Conv] [Diag] Rake-Wall — This function finds the decreasing stud sizes in a rakewall based on computed or entered values for pitch, rise and/or run. Repeated presses of [Diag] will display the descending stud sizes from longest to shortest.
irregular (non-45°) hip/valley rafter is displayed. Answers will show an “I” on the display to indicate if it’s an irregular. [Conv] [Hip/V] Irregular Pitch — Stores the irregular pitch or slope value for calculating lengths of the irregular hip/valley and irregular jack rafters. For instance, to enter a 38° irregular pitch or slope, press 38 [Conv] [Hip/V] (or, to enter a ten inch irregular pitch, enter 10 [Inch] [Conv] [Hip/Valley]). To recall the irregular pitch, press [Rcl] [Conv] [Hip/Valley].
[Jack] Jack Rafter — Used to find the jack rafter sizes—from largest to smallest—for both regular and irregular roofs based on entered values for Pitch, Rise, Run and/or Diagonal, jack on-center, and (optionally) irregular pitch (see above). Use [Conv] [Jack] to access the irregular jack rafter mode. The default on-center spacing for jacks is 600 millimeters in Metric Mode. A new on-center spacing can be permanently set by entering a dimension before pressing [Jack].
Stair and Circle Keys [Stair] A multi-function key that displays the following values when pressed repeatedly: Number of Presses 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 9 Default Riser Height 12 — CONSTRUCTION MASTER ®
When the [Stair] key is preceded by a linear or undimensioned entry, the value will be permanently stored as the “Desired Riser Height”. Undimensioned values are assumed to be millimeters when in Metric Mode or inches if in English Mode. Default = 185 millimeters for Metric Mode (71/2 inches for English Mode). [Circ] Circle — Based on an entered dimensioned diameter, repeated presses display the following circular values: 1) diameter, 2) surface area 3) circumference.
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 registers to default settings (pitch, jack rafter and rake-wall oncenter values, stair riser height, fraction set). [Conv] [+] Pi (π) Constant = 3.141593. [Conv] [–] +/– Changes the sign of the displayed value.
Fractional Rounding Settings: When your calculator is in a default condition (after a battery change or full reset), it is set to round fractional values to the nearest 1/16 of an inch. However, you may program your preference for six different accuracy levels which remain in permanent memory until revised or reset.
Linear Dimensions Below are some examples of how linear dimensions are entered: Dimensions Keystrokes 17.5 Meters 5 Feet 1/2 Inch 5 Feet 1 Inch 5 Feet 1-1/2 Inch 10 Yards 205 Millimeters 17.5 [m] 5 [Feet] 1 [/] 2 5 [Feet] 1 [Inch] 5 [Feet] 1 [Inch] 1 [/] 2 10 [Yds] 205 [mm] Square and Cubic Dimensions Square and cubic dimensions are entered in the following order: (1) Numerical Value; (2) Convention — Square or Cubic; (3) Units — Meters, Yards, Feet, Inches.
DIMENSION CONVERSIONS Linear Conversions Convert 14 feet to other linear dimensions: Keystrokes 14 [Feet] . . . [Conv] [m] [Conv] [cm] [Conv] [mm] [Conv] [Yds] [Conv] [Feet] [Conv] [Feet] [Conv] [Inch] Display Shows 4.2672 M 426.72 CM 4267.2 MM 4.666667 YD 14 FT 0 IN 14 FT 168 IN Square Area Conversions Convert 14 square feet to other square dimensions: Keystrokes 14 [Sq] [Feet] . . . [Conv] [m] [cm] [mm] [Inch] [Yds] Display Shows 1.300643 SQ M 13006.43 SQ CM 1300643 SQ MM 2016 SQ IN 1.
Note: When performing conversions, [Conv] only has to be pressed once. Cubic Conversions Convert 14 cubic feet to other cubic dimensions: Keystrokes Display Shows 14 [Cu] [Feet] . . . [Conv] [m] [cm] [mm] [Inch] [Yds] 0.396 CU M 396435.9 CU CM 0.396 CU M * 24192 CU IN 0.518519 CU YD * Notice in the conversion to millimeters, the answer has “Auto-Ranged” and is again displayed in meters, as otherwise the number of digits would be out of the calculator's normal seven digit display range.
MATHEMATICAL 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 [=] B. 3 [–] 2 [=] 5 1 C. 3 [x] 2 [=] 6 D. 3 [÷] 2 [=] 1.5 This feature also makes the calculator simple to use for dimensional math, as shown in the following examples: Adding and Subtracting Dimensions 1. Add 7 meters to 11 feet 4 inches: 7 [m] [+] 11 [Feet] 4 [Inch] [=] 10.
Note: The format of the first value you enter determines the format of the answer. However, with the [Conv] key you can change to any format you desire, provided that you maintain convention. Multiplying and Dividing Dimensions 1. Multiply 5 feet 3 inches by 11 feet 6-1/2 inches: 5 [Feet] 3 [Inch] [x] 11 [Feet] 6 [Inch] 1[/] 2 [=] 60.59375 SQ FT 2. Divide 30 meters by 16 inches: 30 [m] [÷] 16 [Inch] [=] 73.
MEMORY OPERATION Whenever the [M+] key is pressed, the displayed value will be added to the Memory. The displayed value will be subtracted from Memory by pressing [Conv] [M+]. [Rcl] [M+] recalls and displays the total value of the Memory. [Rcl] [Rcl] displays and clears the Memory as does turning off your calculator. Keystrokes 1. 355 [M+] [Rcl] [Rcl] 2. 355 [M+] 255 [M+] 745 [Conv] [M+] [Rcl] [Rcl] Display Shows 355. 355. 355. 255. 745. – 135.
PAPERLESS TAPE The Paperless Tape allows the user to display and review the last 20 entries of a calculation. This function is accessed by pressing [Rcl] [=]. To review entered values, press [Rcl] [=] to access the tape mode and then press the [+] or [–] keys to either scroll forward or backward through the entries. The Paperless Tape is cleared each time [On/C] is pressed twice, or the unit is shut off. Reviewing Paperless Tape 1.
2. Access the Tape function: Keystrokes [Rcl] [=] Display Shows TTL= 15 CM 3. Scroll from first value to total: Keystrokes [+] [+] [+] [+] Display Shows 01 02+ 03+ TTL= 4 CM 5 CM 6 CM 15 CM 4. Scroll to last 2 values: Keystrokes [–] [–] Display Shows 03+ 6 CM 02+ 5 CM 5. Exit Tape function by pressing any key except [Off ], [+], or [–].
Battery and 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 (one 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. Accuracy/Display — Your calculator has an eleven digit display (seven normal digits and four digits for the fractions).
Software Copyrighted and licensed to Calculated Industries by Construction Master Technologies, LLC, 2000 Construction Master IV User’s Guide Copywrited by Calculated Industries, 2000 Construction Master® and Calculated Industries® are registered trademarks of Calculated Industries, Inc. ALL RIGHTS RESERVED. Designed in the United States of America ©2000, Calculated Industries 4840 Hytech Drive Carson City, NV 89706 1-775-885-4900 Fax: 1-775-885-4949 www.calculated.
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