CONSTRUCTION MASTER 5 ® ADVANCED FEET-INCH-FRACTION CALCULATOR Pocket Reference Guide Model 4050 f Insert This Direction
CONSTRUCTION MASTER® 5 The Construction Master 5 calculator helps you save time, cut costly errors and build like a pro! Quickly Solve: • Feet-Inches-Fractions, Yards, Metric Dimensional Problems and Conversions • Problems Involving All Fractions — 1/2-1/64ths! • Areas, Volumes and Weights • Circle/Arc Calculations • Common, Hip/Valley, Jack Rafter Lengths (Regular and Irregular) • Rake-Wall Solutions • Concrete, Flooring Quantity • Squaring-Up • Stair Layout Solutions, and more!
TABLE OF CONTENTS GETTING STARTED ...............................1 KEY DEFINITIONS/FUNCTIONS..........1 Basic Function Keys ............................1 Dimension Keys...................................2 Arc/Circle Keys ....................................4 Right Triangle/Roof Framing Keys ......4 Stair Layout Key ..................................7 Stair Settings .......................................8 Miscellaneous Functions .....................8 PAPERLESS TAPE EXAMPLE ...........
Circle Area and Circumference .........24 Arc Angle or Degree ..........................24 Concrete Volume for Driveway..........25 Concrete Columns.............................25 Complex Concrete Volume................26 RIGHT ANGLE/FRAMING ...................28 Squaring-Up a Foundation ................29 Pitch — Converting Roof Angle.........29 Converting Slope ...............................30 Common Rafter Length .....................30 Regular Hip/Valley and Jack Rafters ...............................
GETTING STARTED KEY DEFINITIONS / FUNCTIONS Basic Function Keys +–x ÷= 0–9 and • % O o Ç √ Arithmetic operation keys. Keys used for entering numbers. Percent Key — Four-function (+, –, x, ÷) percent key. Off Key — Turns all power off, clearing all non-permanent registers. On/Clear Key — Turns on power. Pressing once clears the display. Pressing twice clears all temporary values.
Recall Key — Used with other keys to recall stored values and settings. ® Memory Key — Adds the displayed value to Memory. Clears when the calculator is shut off. µ ǵ Ç® ®® Memory Minus (M–) — Subtracts the displayed value from Memory. Memory Clear — Clears Memory without changing current display. Memory Clear — Clears Memory and displays Memory Total. Dimension Keys y f Yards Key — Enters or converts to Yards. Feet Key — Enters or converts to Feet as whole or decimal numbers.
i / m c M b Inch Key — Enters or converts to Inches. Entry can be whole or decimal numbers. Also used with the / key for entering fractional inch values (e.g., 9 i 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.
Weight Key — Enters or converts (a volume value) to Tons, Pounds, Metric Tons or Kilograms. Repeated presses will cycle through these units. w Arc/Circle Keys Circle Key — Calculates Circle Area and Circumference based on entered Diameter. C ÇC Arc — Calculates Arc Length or Degree based on entered Diameter and Arc Degree or Length (e.g., if Arc Degree is entered, it will calculate Arc Length, and vice versa).
a Dimension 9ip an Angle 30p a Ratio 0 • 7 5 Ç p a Percentage 7 5 % p 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. Çp r R d H Enters Pitch Ratio (e.g., • 5 8 3 Ç p). Rise Key — Enters or calculates the Rise or vertical leg (height) of a Right Triangle. Run Key — Enters or calculates the Run or horizontal leg (base) of a Right Triangle.
ÇH Jack Key — Calculates Jack rafter lengths on the Regular-pitched roof side. j Çj ∑ Irregular Pitch — Enters Irregular Pitch used to calculate lengths of the Irregular Hip/Valley and Jack rafters. Irregular Jack — Calculates Jack rafter lengths on the Irregular-pitched roof side. Rake-Wall Key — Finds the stud sizes based on entered Right Triangle values and the stored OnCenter spacing.
Stair Layout Key s Stair Key — Given Rise and/or Run and entered/ stored variables, calculates or displays: Press 1 2 3 4 5 6 7 8 9 10 11 12 STAIR DEFAULT VALUES Result Riser Height Number of Risers Riser Overage/ Underage Tread Width Number of Treads Tread Overage/ Underage Stringer Length Angle of Incline Stored Run Stored Rise Stored Desired Riser Height Stored Desired Tread Width • 7-1/2” Desired Riser Height • 10” Desired Tread Width POCKET REFERENCE GUIDE — 7
Stair Settings You may set “desired Riser height” and “desired Tread width” to any value by using the following keys: Ç7 Ç9 Riser Height — Stores a desired Riser height other than 7-1/2” (default). For example, enter 8 Inches: 8 i Ç 7. Tread Width — Stores a desired Tread width other than 10” (default). For example, enter 12 Inches: 1 2 i Ç 9. Miscellaneous Functions B Ç÷ Çx Ç– Ç+ Backspace Key — Used to delete entries one keystroke at a time (unlike the o function, which deletes the entire entry).
Ç√ Ç• Ç0 x 2 — Squares a linear or non-dimensional value. Total Cost — Based on entry of per unit cost. Store Weight per Volume — Stores a new Weight per Volume value as listed below: Note: After entering a value and pressing Ç 0, continue pressing the 0 digit key until you’ve reached the desired Weight per Volume format. To recall your setting, press ® 0.
Paperless Tape – Useful for checking figures, as it scrolls through your past 20 entries or calculations. Press ® = to access Paperless Tape mode. Press + or – to scroll forward or backward. Press = to exit mode and continue with a new entry or calculation. See example below. ®= PAPERLESS TAPE EXAMPLE Add 6 Feet, 5 Feet and 4 Feet, then access the paperless tape mode and scroll back through your entries. Then, back up one entry, exit the tape mode and add 10 Feet to the total.
PREFERENCE SETTINGS Press Ç, then %, then keep pressing % to toggle through the main settings. Press the + key to advance within sub-setting. Use the – key to back up. Press o key to exit Preferences. PRESS Ç AND: First press of %: + + + + + + SETTING--FUNCTION Fractional Resolution: --1/16 --1/32 --1/64 --1/2 --1/4 --1/8 --1/16 (repeats options) Second press of %: Area Displays: --Std. + --0. SQ FEET + --0. SQ YD + --0. SQ M + --Std.
(Cont’d) PRESS : Fourth press of %: + + Fifth press of %: + + Sixth press of %: + + SETTING--FUNCTION Meter Linear Displays: --0.000 M --FLOAt M (floating point) --0.000 M (repeats options) Decimal Degree Displays: --0.00º --FLOAt (floating point) --0.00º (repeats options) Fractional Mode: --Std. --COnSt --Std.
ENTERING DIMENSIONS Linear Dimensions When entering Feet-Inch values, enter dimensions from largest to smallest — Feet before Inches, Inches before Fractions. Enter Fractions by entering the numerator (top number), pressing / (Fraction Bar key) and then the denominator (bottom number). Note: If a denominator is not entered, the fractional setting value is used. Examples of how linear dimensions are entered (press o after each entry): DIMENSION KEYSTROKES 5 Yards 5y 5 Feet 1-1/2 Inch 5 f 1 i 1 / 2 17.
Linear Conversions Convert 10 Feet 6 Inches: KEYSTROKE oo 10f6i Çy Çi Çm Çc ÇM 10 DISPLAY 0. 6 INCH 3.5 YD 126 INCH 3.200 M 320.04 CM 3200.4 MM FEET Convert 14 Feet 7-1/2 Inches to Decimal Feet: KEYSTROKE DISPLAY oo 0. 14f7i1/2 14 FEET 7-1/2 INCH Çf 14.625 FEET Convert 22.75 Feet to Feet-Inches: KEYSTROKE oo 22•75f Çf DISPLAY 0. 22.
Square and Cubic Conversions Convert 14 Square Feet to Square Yards: KEYSTROKE DISPLAY 0. 14 SQ FEET 1.555556 SQ YD (1.6 square yards) oo 14ff Çy Convert 25 Square Yards to Square Feet: KEYSTROKE DISPLAY 0. 25 SQ YD 225. SQ FEET oo 25yy Çf Convert 12 Cubic Feet to Cubic Yards: KEYSTROKE DISPLAY 0. 12 CU FEET 0.
EXAMPLES Adding and Subtracting Strings of Dimensions Add the following measurements: • 6 Feet 2-1/2 Inches • 11 Feet 5-1/4 Inches • 18.25 Inches Then subtract 2-1/8 Inches: KEYSTROKE DISPLAY oo 6f2i1/2+ 6 FEET 2-1/2 11f5i1/4+ 17 FEET 7-3/4 18•25i= 19 FEET 2 – 2 i 1 / 8 = 18 FEET 11-7/8 Multiplying Dimensions 0.
Dividing Dimensions Divide 15 Feet 3-3/4 Inches into thirds (divide by 3): KEYSTROKE DISPLAY oo 15f3i3/4÷3= 5 FEET 1-1/4 0. INCH How many 3-Foot 6-Inch pieces can you cut from one 25-foot board? KEYSTROKE DISPLAY oo 0. 2 5 f ÷ 3 f 6 i = 7.142857 (or 7 whole pieces) Percent Calculations Add a 10% waste allowance to 2.78 Cubic Yards: KEYSTROKE DISPLAY oo 0. 2•78yyy+10% 3.058 CU YD What is 25% of $1,575? KEYSTROKE oo 1575x25% DISPLAY 0. 393.
Square Area Find the Area of a square room with sides measuring 15 Feet 8-1/2 Inches: KEYSTROKE DISPLAY oo 0. 1 5 f 8 i 1 / 2 Ç √ (x 2) 246.7517 SQ FEET Rectangular Area and Volume Find the Area and Volume: • Length: 20 Feet 6-1/2 Inches • Width: 12 Feet 8-1/2 Inches • Height: 10 Inches First, multiply the Length times the Width to find the Area. Then, multiply the Area times the Height to find the Volume: KEYSTROKE DISPLAY oo 0. 20f6i1/2x 20 FEET 6-1/2 INCH 12f8i1/2x 261.0503 SQ FEET 10i= 8.
Entering Square and Cubic and Adding a Waste Allowance Add a 10% waste allowance to 55 Square Feet. Then add a 20% waste allowance to 150 Cubic Feet: KEYSTROKE DISPLAY oo 5 5 f f + 1 0 % 60.5 SQ 150fff+20% 180. CU Weight Conversions 0. FEET FEET Convert 150 Pounds to other weights (Tons, Metric Tons, Kilograms): KEYSTROKE oo 1 5 0 w w* Çw w w DISPLAY 150 0. LB 0.068039 MET Ton 68.03886 kG 0.
Weight per Volume Convert 20 Cubic Yards of concrete to Tons, Pounds, Metric Tons and Kilograms, if concrete weighs 1.5 Tons per Cubic Yard (default value): KEYSTROKE DISPLAY 0. 20 CU YD 30. Ton* 60000. LB 27.21554 MET Ton 27215.54 kG oo 20yyy Çw w w w Now convert the above, if concrete weighs 2 Tons per Cubic Yard (store new Weight per Volume value): KEYSTROKE 2Ç0 20yyy Çw w w w Çx STORED 2. DISPLAY Ton Per CU YD 20 CU YD 36287.39 kG* 40. Ton 80000. LB 36.
Using the Memory Whenever the µ key is pressed, the displayed value will be added to the Memory.
Board Feet and Cost Find the total Board Feet for the following boards: 2x4x16, 2x10x18 and 2x12x20. What is the total cost at $275 per MBM*? *Per thousand Board Foot measure KEYSTROKE DISPLAY oo 0. 2x4x16bµ BDFT 10.66667 M 2x10x18bµ BDFT 30. M 2x12x20bµ BDFT 40. M ®® BDFT 80.66667 x275Ç• $ 22.18 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: oo 0.
Baluster Spacing You are going to install a handrail at the top of a balcony. Your total span is 156 Inches and you would like the space between the balusters to be about 4 Inches. If each baluster is 1-1/2 Inches wide, what is the exact spacing between each baluster? KEYSTROKE DISPLAY 1. Estimate number of balusters in Span: oo 0. 156i÷ 156 INCH 5 i 1 / 2 =* 28.36364 (28 balusters) *Desired spacing plus baluster width (4 Inches plus 1-1/2 Inch) 2.
Circle Area and Circumference Find the Area and Circumference of a Circle with a Diameter of 25 Inches: KEYSTROKE oo 25iC C C DISPLAY 0. DIA 25 INCH AREA 490.8739 SQ INCH CIRC 78-9/16 INCH Arc Angle or Degree Dgm-ARC-102 Find the Arc Angle (or Degree of Arc), given a 5-Foot Diameter and an Arc Length of 3 Feet 3 Inches: KEYSTROKE DISPLAY 1. Enter Circle Diameter and Arc Length: oo 0. 5fC DIA 5 FEET 0 INCH 3f3i 3 FEET 3 INCH 2. Find Degree of Arc: ÇC ARC 74.
Concrete Volume for Driveway Calculate the Cubic Yards of concrete required to pour a driveway that measures: 45 Feet 5 Inches long x 13 Feet 6 Inches wide x 5 Inches deep. If concrete is $65 per Cubic Yard, what will it cost? KEYSTROKE oo 45f5i x13f6i x5i= x65Ç• Concrete Columns DISPLAY 0. 45 FEET 5 INCH 13 FEET 6 INCH 9.461806 CU YD $ 615.02 (total cost) 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.
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.
KEYSTROKE oo DISPLAY 0. 1. Find Area of Part “A” and add to Memory: 38f2i– 4f2i= 34 FEET 0 INCH x27f= 918. SQ FEET µ M+ 918. SQ FEET M 2. Find Area of Part “B” and add to Memory: 4f2i 4 FEET 2 INCH M x8f6i= 35.41667 SQ FEET M µ M+ 35.41667 SQ FEET M 3. Find Area of Part “C” and add to Memory: 9f 9 FEET M x 9 f 6 i = 85.5 SQ FEET M µ M+ 85.5 SQ FEET M 4. Recall and Clear Total Area Stored in Memory: ®® M+ 1038.917 SQ FEET 5. Find Total Cubic Yards: x 4 i 1 / 2 = 14.
RIGHT ANGLE / FRAMING The top row of keys provide you with builtin 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: Dgm-RAF-104 1) Rise, 2) Run, 3) Diagonal or 4) Pitch.
10’ 2” Squaring-Up a Foundation are Dgm-SUD-105 u Sq -U Dia p( go na l) 15’ 6” Square-Up 15 Feet 6 Inch (Run) x 10 Feet 2 Inch (Rise): KEYSTROKE DISPLAY oo 15f6iR RUN 15 FEET 6 10f2ir RISE 10 FEET 2 d DIAG 18 FEET 6-7/16 Pitch — Converting Roof Angle 0. INCH INCH INCH Find the % Grade, Pitch Ratio/Slope and Pitch in Inches if the roof angle is 30.25°: KEYSTROKE oo 30•25p p p p DISPLAY 0. PTCH 30.25° %GRD 58.31828 SLP 0.
Converting Slope Find the Pitch in Inches, Pitch Degrees, and Percent Grade if the Pitch Ratio/Slope is 0.625: KEYSTROKE oo •625Çp p p p DISPLAY 0. SLP 0.625 PTCH 7-1/2 INCH PTCH 32.01° %GRD 62.5 Common Rafter Length Find the Point-to-Point Length of the Common rafter on a 7/12-Pitched roof with a Span of 28 Feet: KEYSTROKE DISPLAY oo 1. Enter Pitch: 7ip PTCH 7 0. INCH 2. Enter half the Span as the Run: 28f÷2= 14 FEET 0 INCH R RUN 14 FEET 0 INCH 3. Find the Rise: r RISE 8 FEET 2 INCH 4.
Dgm-Raft-106 Regular Hip/Valley and Jack Rafters A roof’s Pitch is 9/12 and half the total Span is 6 Feet. Find the lengths of the Common, Hip/Valley and Jack rafters (Jack rafters at 16 Inch On-Center spacing): KEYSTROKE DISPLAY 1. Find the Common rafter length: oo 0.
(Cont’d) KEYSTROKE DISPLAY 2. Find the Hip/Valley rafter and Jack rafter lengths: H H/V 9 FEET 7-1/4 INCH j JKOC STORED 16 INCH* j JK 1 5 FEET 10 INCH j JK 2 4 FEET 2 INCH j JK 3 2 FEET 6 INCH j JK 4 0 FEET 10 INCH j JK 5 0 FEET 0 INCH *Uses standard (default) 16-Inch On-Center. To enter a new On-Center (e.g., 18 Inches) press 1 8 i Ç 5. Press ® 5 to review stored value. This value will remain stored until you re-enter a new value or perform a Clear All (Ç x).
Irregular Hip/Valley You’re working with a 7/12 Pitch and half of 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 oo DISPLAY 0. 1. Find Common Rafter Length: 7ip PTCH 7 INCH 15f7iR RUN 15 FEET 7 INCH d DIAG 18 FEET 0-1/2 INCH 2. Find Irregular Hip Rafter Length: 8iÇH IPCH 8 INCH H IH/V 22 FEET 7-3/8 INCH 3.
Rake-Wall — No Base Find each stud size in a Rake-Wall with a peak of 3 Feet 6 Inches and a length of 6 Feet. Use 16 Inches as your spacing (default): KEYSTROKE 1. Enter Rise and Run: oo 3 f 6 i r RISE 3 6fR RUN 6 DISPLAY FEET FEET 6 0 0. INCH INCH 2. Find Stud Lengths: ∑ RWOC STORED 16 INCH ∑ RW 1 2 FEET 8-11/16 INCH ∑ RW 2 1 FEET 11-5/16 INCH ∑ RW 3 1 FEET 2 INCH ∑ RW 4 0 FEET 4-11/16 INCH ∑ BASE 0 FEET 0 INCH 3. Find Rake-Wall Angle of Incline: ∑ RW 30.
Dgm-Stairs-107 STAIRS Stairs — Given Rise and Run You’re going to build a stairway that has a Floor-to-Floor height of 10 Feet 1 Inch, a Run of 12 Feet 5 Inches, and a desired Riser Height of 7-1/2 Inches (default). Find the stair values: KEYSTROKE 1. Enter Rise and Run: oo 10f1ir RISE 10 12f5iR RUN 12 DISPLAY FEET FEET 1 5 0.
(Cont’d) KEYSTROKE DISPLAY 2. Recall stored 7-1/2 Inch desired Riser Height and find stair values: ®s R-HT STORED 7-1/2 INCH s R-HT 7-9/16 INCH* s RSRS 16. s R+/– 0 INCH s T-WD 9-15/16 INCH* s TRDS 15. s T+/– 0-1/16 INCH s STRG 15 FEET 7-5/16 INCH s INCL 37.27° *A in the display means the calculated Riser Height or Tread Width is greater than the stored desired Riser Height or Tread Width.
Stairs — Given Only the Floor-to-Floor Rise; Entering Other Than 7-1/2 Inch Desired Riser Height Find stair values if the Floor-to-Floor Rise is 12 Feet 6 Inches, and the desired Riser Height is 8 Inches: KEYSTROKE DISPLAY 1. Enter desired Riser Height and Floor-toFloor Rise: oo 0. 8iÇ7 R-HT STORED 8 INCH 12f6ir RISE 12 FEET 6 INCH 2. Calculate stair values: s R-HT 7-7/8 INCH s RSRS 19. s R+/– – 0-3/8 INCH s T-WD STORED 10 INCH s TRDS 18. s T+/– 0 INCH s STRG 19 FEET 1-1/8 INCH s INCL 38.
APPENDIX Setting Fractional Resolution Fractional resolution is pemanently set via the Preference Settings (see Preference Settings section for instructions). To select other formats temporarily (e.g., 1/64ths, 1/32nds, etc.), see the example below: Add 44/64th to 1/64th of an inch and then convert the answer to other fractional resolutions: KEYSTROKE oo 44/64 +1/64= Ç 1 (1/16) Ç 2 (1/2) Ç 3 (1/32) Ç 4 (1/4) Ç 6 (1/64) Ç 8 (1/8) oo DISPLAY 0-44/64 0-45/64 0-11/16 0-1/2 0-23/32 0-3/4 0-45/64 0-3/4 0.
Default Settings After a Clear All (Ç x), your calculator will return to the following settings: STORED VALUES Stair Riser Height Stair Tread Width On-Center Spacing Weight per Volume DEFAULT VALUE 7-1/2 Inch 10 Inch 16 Inch 1.
Accuracy/Errors Accuracy/Display Capacity — You may enter or calculate values up to 19,999,999.99. Each calculation is carried out internally to twelve 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 o button once. At this point you must determine what caused the error and re-key the problem.
Battery This model uses one (1) CR2016 battery (included). Should your calculator display become very dim or erratic, replace the battery. Note: Please use caution when disposing of your old battery, as it contains hazardous chemicals. Replacement battery is available at most discount or electronics stores. You may also call Calculated Industries at 1-775-885-4900.
AREA AND VOLUME FORMULAS Dgm-AF-100 Area Formulas POCKET REFERENCE GUIDE — 42
Dgm-VF-101 Volume Formulas POCKET REFERENCE GUIDE — 43
REPAIR AND RETURN Warranty, Repair and Return Information Return Guidelines 1. 2. 3. 4. Please read the Warranty in this User's Guide to determine if your Calculated Industries product remains under warranty before calling or returning any device for evaluation or repairs. If your product won't turn on, check the battery as outlined in the User's Guide. If you need more assistance, please go to the website listed below.
WARRANTY Warranty Repair Service – U.S.A. Calculated Industries (“CI”) warrants this product against defects in materials and workmanship 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 calculator) the product at no charge.
Disclaimer CI 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.
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. LOOKING FOR NEW IDEAS Calculated Industries, a leading manufacturer of special-function calculators and digital measuring instruments, is always interested in new product ideas in these areas. If you have a new product idea, please visit our “Bright Idea” page at www.calculated.com/brightidea.asp.
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. Software copyrighted and licensed to Calculated Industries, Inc. by Construction Master Technologies, LLC, 2009. Pocket Reference Guide copyrighted by Calculated Industries, Inc. © 2009. Construction Master® and Calculated Industries® are registered trademarks of Calculated Industries, Inc.
