T he Construction Master Plus EZ (CMP EZ) is the newest in Calculated Industries′ line of award-winning Construction Master construction-math calculators. The big difference between the CMP EZ and the other models is that, in addition to many more built-in calculations, the CMP EZ is a Prompting Calculator. With a Prompting Calculator, you select a function and then scroll through a series of prompts for quantities, measurements, placement, materials and other possible inputs.
The Construction Master Plus EZ has Basic and Advanced solutions (lengths, angles, quantities, etc.
Table of Contents Key Definitions........................................................................................................... 3 Basic Function Keys.................................................................................................. 3 Construction Prompting Keys.................................................................................. 10 Using the Construction Master Plus EZ.................................................................
Key Definitions Basic Function Keys O On/Clear Key – Turns on power. When not in a prompting sequence, pressing once clears the last entry and what is displayed. Pressing twice clears all non-permanent values. Within a prompting input sequence, pressing once clears the entry and leaves the prompt displayed. Pressing twice exits the prompt function, but does not clear non-permanent values. A third press clears non-permanent values.
+-x÷= 0 – 9 and . C R RR 4 Arithmetic operation keys Keys used for entering numbers. Convert – Used with the dimensional keys to convert between units or with other keys to access special functions. Recall – Used with other keys to recall stored values and settings. Memory Clear – Clears Accumulative Memory and displays total. CR M Store – Used for storing values. CM M- – Subtracts displayed value from Accumulative Memory. Accumulative Memory – Adds displayed value to Accumulative Memory.
Dimensional Function Keys y Yards – Identifies entry as yards, with repeated presses toggling between linear, area and volume units. f Feet – Identifies entry as Feet, with repeated presses toggling between linear, area and volume units. Also used with i and / keys for entering Feet-Inch values. Repeated presses during conversions toggle between Feet-Inch-Fractions and Decimal Feet. i Inch – Identifies entry as Inches, with repeated presses toggling between linear, area and volume units.
6 / Fraction Bar – 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. Results are always shown in typical building fractional format. m Meters – Identifies entry as meters, with repeated presses toggling between linear, area and volume units.
C8 Board Feet (Bd Ft) – Enters or converts cubic values to Board Feet. One Board Foot is equal to 144 cubic inches. C2 Acre – Enters or converts a square value to Acres. Weight and Volume Function Keys C5 Weight per Volume (wt/vol) – Stores a new weight volume as tons per cubic yard or other format as shown below. Default value is 1.5 tons per cubic yard.
C6 C1 Tons – Enters or converts a weight or volume value to tons. Kilograms (kg) – Enters or converts a weight or volume value to kilograms. Miscellaneous Functions < % C% C0 8 Backspace Arrow – Used to delete entries one keystroke at a time (unlike the O function, which deletes the entire entry). Percentage – Used to find a given percentage of a number. x2 – Squares the value on the display. Total Cost (Cost) – Calculates total cost based on entered or stored Unit Cost.
CR0 Unit Cost – Stores the Unit Cost for calculating the total cost. To recall this setting, press R0 . Default is 0.00 (no Unit Cost). C. Degrees:Minutes:Seconds (dms◄►deg) – Converts between D:M:S and decimal degree formats; repeated presses will toggle between the two formats. C= Square Root (√¯x) – Calculates the Square Root of the number on the display. C+ CCx Pi – Displays value of π (3.1415927). Change Sign (+/–) – Toggles displayed value between negative and positive value.
C÷ Reciprocal (1/x) – Finds the Reciprocal of a number (e.g., 8C÷= 0.125). Construction and Prompting Keys 10 S Square Up – Calculates the Square-Up (diagonal) Length, Area and Perimeter when Length and Width are entered. CS LxWxH – Calculates Volume, Wall Surface Area, Wall + Ceiling Area, Square-Up, Area and Perimeter when Length, Width and Height are entered. r Cr Rafter (Basic) – Calculates basic lengths and angles for Rafters.
Ch j Cj Hip/Valley (Advanced) – Calculates advanced lengths and angles for Regular and Irregular Hip/Valley Rafters. Jack Rafter (Basic) – Calculates basic lengths and angles for Regular and Irregular Jack Rafters. Jack Rafter (Advanced) – Calculates advanced lengths and angles for Regular and Irregular Jack Rafters. s Stair (Basic) – Calculates values for Stairs when Floor-to-Floor Rise and/or Stair Run is entered.
Cc a Ca b Cb N 12 Rake Wall – Calculates various stud lengths for Rake Walls with or without bases. Arc – Calculates values for Chord Length, Arc Height, Radius, Arc Length/Angle, and Arc Segment Area. Arch Studs – Calculates Arch Stud lengths for Arched Walls. Baluster – Calculates for Cap Wall Balusters, where all baluster lengths are the same. Open Baluster – Calculates for Open Wall Balusters, which have different-length balusters on a tread.
CN Extras – Accesses functions for Elliptical Arches, Crown Molding, Compound Angles, Polygons and Spacing. Also used to access Preferences for customizable settings (see Preference Settings section). ^ Up Arrow – Used to scroll up (or back) through prompts, entries and solutions. v Down Arrow – Used to scroll down (or forward) through prompts, entries and solutions. e Ce Enter – Used to enter or accept values.
Using the Construction Master Plus EZ This Pocket Reference Guide has step-by-step keystroked examples for some of the CMP EZ’s functions. You can see, and download, a complete illustrated User’s Guide with examples for all of the CMP EZ’s functions at www.calculated.com/4067/UG. The Construction Master Plus ez is a Prompting Calculator. To use it you simply select a function and then scroll through a series of prompts for quantities, measurements, placement, materials and other possible inputs.
Auto Shut-Off and Auto Shutdown The LCD display on your calculator is designed to shut off after 4 minutes of non-use. If the display powers off, just press the O key to power it back on. All values are maintained. Your most recent entry will be displayed and you can scroll through or continue to enter values for the same calculation you were working on before the display shut off. After 4 hours of non-use, the calculator will shut down and all temporary settings and values are cleared. U.S.
Default Values The table below shows the calculator’s U.S. and Metric Default Values. Default Values can be changed by entering a new value. The new Default Value will remain until you change it or reset it to zero. An All Clear (Cx) will reset values to the calculator’s Default Values. Functions — U.S. Mode Common Rafter • Ridge Thickness • Rafter Width • Plate Width 16 Jack Rafter • O.C.
Rake Wall • O.C. Spacing • Top Plate Thickness 16" 1-1/2" Arch Studs • O.C. Spacing • Location 16" 1 = Outside Functions — Metric Mode Common Rafter • Ridge Thickness • Rafter Width • Plate Width 38 mm 200 mm 100 mm Baluster/Open Baluster • Maximum Spacing Hip/Valley • Ridge Thickness Jack Rafter • O.C. Spacing • Rafter Thickness • Hip/V Thickness • Ridge Thickness 400 mm 38 mm 38 mm 38 mm Stairs • Target Riser Height • Target Tread Width • Top Floor Thickness • Headroom Height Rake Wall • O.C.
Materials — U.S.
Studs • O.C. Spacing • Waste Factor 16" 5% Tile • Grout Width • Tile Thickness • Waste Factor 1/8" 1/4" 5% Drywall Sheets • Include Ceiling • Sheet Length • Sheet Length • Waste Factor 1 = Yes 2400 mm 1200 mm 5% Tile calculations are based on 3' x 5' Backer Board Size.
Fencing • Number of Rails • Maximum Post Spacing • Post Width 20 2 2.4 m 69 mm Footings • Footing Area • Waste Factor 0.2 sq m 5% Pavers • Paver Length • Paver Length • Waste Factor 215 mm 102.5 mm 5% Studs • O.C. Spacing • Waste Factor 400 mm 5% Roofing • Waste Factor 5% • Number of Nails per Shingle 4 • Length of Nail 30 mm • Number of Pieces per Bundle 21 • Number of Bundles per Square 3 Roofing calculations are based on 1200 mm x 2400 mm Sheathing Size.
Extras — U.S. Mode Extras — Metric Mode Elliptical Arch • O.C. Spacing • Position 16" 1 = Outside Elliptical Arch • O.C.
Construction Examples For each of the functions shown in the Pocket Reference Guide and the User’s Guide there is a box, like the ones shown, with all of the required entries, optional entries and possible solutions for that function. You can also quickly see the prompts for entries and possible solutions for each function on the calculator by accessing the function and then scrolling through the prompts and solutions, with repeated presses of the e key, the ^ key, or the v key.
Square-Up Required Entries solutions Length Width Square-Up Area Perimeter LxWxH Required Entries solutions Length Width Height Volume Vertical Surface Area Vertical + LxW Surface Area Square-Up LxW Area Perimeter 23 Continued ►
EXAMPLE: Enter a 15′ 8" Length, 12′ 6" Width and 4" Height: 1. Clear Calculator: OOO 2. Start Length x Width x Height function: CS 3. Enter 15′ 8" Length: 15f8ie 4. Enter 12′ 6" Width: 12f6ie 5. Enter 4" Height and solve for L x W x H: 4ie 24 VOLUME 65.
e e e e e VERTICAL SURFACE AREA 18.777778 SQ FEET VERTICAL + LxW AREA 214.61111 SQ FEET SQUARE-UP 20 FEET 0-1/2 INCH LxW AREA 195.
Advanced Rafters Required Entries Possible Solutions Two of these required: • Pitch • Run (or Span) • Rise • Common Rafter Length Common Rafter Length Common Tail Length** Total Rafter Length** Plumb Angle Level Angle Seat Cut Standard 2/3 HAP Full Bearing HAP Pitch Run Rise Optional Entries 26 Horizontal Overhang Total Fascia Thickness Ridge Thickness • Default value: 1-1/2" Rafter Width • Default value: 7-1/4" Top Plate Width • Default value: 3-1/2" HAP*
* Height Above Plate. If a Top Plate value is shown when you want to enter a HAP, clear the Top Plate value by pressing either or . Then, press to move to the HAP entry prompt and enter the desired value. O 0 e **Tail Length and Total Rafter Length shown only when Horizontal Overhang is entered. EXAMPLE: Enter an 8" Pitch, a 12′ Run, an 18" Overhang and 2-1/4" Total Fascia Thickness: 1. Clear Calculator: OOO 2. Start Advanced Rafter function: Cr 3. Enter 8" Pitch: 8ie 4.
5. Enter 18" Overhang: 18ie 6. Enter 2-1/4" Total Fascia Thickness: 2i1/4e 7. Accept 1-1/2" default value for Ridge Thickness: e 8. Accept 7-1/4" default value for Rafter Width: e 9. Accept 3-1/2" default value for Top Plate Width and solve for Rafters: e 28 e e e e COMMON RAFTER LNTH TAIL LENGTH TOTAL RAFTER LNTH PLUMB ANGLE LEVEL ANGLE 14 FEET 4-3/16 INCH 19-3/8 INCH 15 FEET 11-9/16 INCH 33.69° 56.
e e e STANDARD 2/3 HAP FULL BEARING HAP RISE Basic Hip/Valley Rafters 5-13/16 INCH 6-3/8 INCH 8 FEET 0 INCH Required Entries Possible Solutions Two of the first three required: • Common Pitch • Run (or Span) • Rise Hip/Valley Length Plumb Angle Level Angle Common Cheek Angle Irregular Cheek Angle Optional Entries Irregular Pitch EXAMPLE: Find the Hip/Valley Rafter Lengths and Angles using an 8" Common Pitch and a 12′ Run: 1.
2. Start Basic Hip/Valley function: h 3. Enter 8" Common Pitch: 8ie 4. Enter 12′ Run: 12fe 5. No entry for Irregular Pitch (Common Pitch used). Solve for Hip/Valley values: 18 FEET 9-1/8 INCH e HIP/VALLEY LNTH 25.24° e PLUMB ANGLE 64.76° e LEVEL ANGLE 45.
1. Clear Calculator: OOO 2. Start Basic Hip/Valley function: h 3. Enter 8" Common Pitch: 8ie 4. Enter 8′ Run: 8fe 5. Enter 10" Irregular Pitch and solve for Hip/Valley values: 10ie e e e e HIP/VALLEY LNTH PLUMB ANGLE LEVEL ANGLE COMMON CHEEK ANGL IRREGULAR CHEEK ANGL 11 FEET 6-5/8 INCH 27.50° 62.50° 38.66° 51.
Advanced Stairs 32 Required Entries Possible Solutions One of these two required: • Floor-to-Floor Rise • Stair Run Target/Max Riser Height • Default value: 7-1/2" Target Tread Width • Default value: 10" Top Floor Thickness • Default value: 10" Headroom Height • Default value: 80" Net Floor-to-Floor Height Number of Risers Actual Riser Height* Number of Treads Actual Tread Width* Minimum Stairwell Opening Stringer Length Inclination Angle** Rough Stair Run Finished Stair Run*** Toe Positions
Optional Entries Upper Flooring Thickness Lower Flooring Thickness Nosing Length Riser Thickness * A warning sign appears on the display when the calculated Tread Width is less than the Target Tread Width or when the calculated Riser Height exceeds the Target Riser Height. ** A warning sign appears if the actual Inclination Angle is 10% greater than the Target Riser/Tread ratio. *** Finished Stair Run value is shown only if Nosing Length or Riser Thickness is entered.
Example using Solve function: Using default values (including 7-1/2" Target Riser Height), solve for Advanced Stairs with a 10' 1" Floor-to-Floor Rise and a Stair Run of 15' 5": 1. Clear Calculator: OOO 2. Start Advanced Stair function: Cs 3. Enter 10' 1" Floor-to-Floor Rise: 10f1ie 4. Accept 7-1/2" default value for Target Riser Height: e 5. Enter 15' 5" Stair Run: 15f5ie 34 6.
NET FLOOR-FLOOR RISE 10 FEET 1 INCH NUMBER OF RISERS 16. ACTUAL RISER HGHT. 7-9/16 INCH NUMBER OF TREADS 15. ACTUAL TREAD WDTH 12-5/16 INCH MIN STAIRWELL OPEN 12 FEET 2-3/4 INCH STRINGER LENGTH 19 FEET 3-1/2 INCH INCLINE ANGLE 31.52° ROUGH STAIR RUN 15 FEET 5 INCH TOE POSITION Ø1 1 FEET 2-7/16 INCH Continued presses of e will show all Toe Positions. 19 FEET 3-1/2 INCH e TOE POSITION LAST * The in the display indicates the Actual Riser Height exceeds the stored Target Riser Height (Default value: 7-1/2").
Rake Wall Function Required Entries Possible Solutions Two of the first three required: • Pitch • Run • Rise On-center Spacing • Default value: 16" Top Plate Length Differential Length Inclination Angle Various Rake Wall Stud Sizes Optional Entries Base Height Top Plate Thickness • Default value: 1-1/2" 36 EXAMPLE: Find the Stud lengths for a Rake Wall with an 8" Pitch and 6' Run using the default 16" Inch On-center Spacing and 1-1/2" Top Plate Thickness:
1. Clear Calculator: OOO 2. Start Rake Wall function: Cc 3. Enter Pitch: 8ie 4. Enter Run: 6fe 5. No Base Height: e 6. Accept 16″ default value for On-center Spacing: e 7.
e e e e e e e 38 TOP PLATE LENGTH DIFFERENTIAL LNTH INCLINATION ANGL RAKE WALL STUD Ø1 RAKE WALL STUD Ø2 RAKE WALL STUD Ø3 RAKE WALL STUD Ø4 RAKE WALL STUD Ø5 7 FEET 2-9/16 INCH 10-11/16 INCH 33.
Materials Functions Press the N key to access the Materials function. Continued presses of the N key will scroll though the available Materials. When you find the Material you’re working with, press e , and you will be prompted for the required dimensions and quantities.
Studs Required Entries Possible Solutions Wall Length Number of Corners Number of Windows Number of Doors On-center Spacing • Default value: 16″ Number of Studs Optional Entries Waste Factor • Default value: 5% EXAMPLE: Find the number of Studs required for a wall 40′ long with two corners, two windows and one door: 40 1.
2. Go to Materials function: N (If necessary, continue pressing N until STUDS displays.) 3. Start Studs Function: e 4. Enter 40' Total Wall Length: 40fe 5. Enter two Corners: 2e 6. Enter two Windows: 2e 7. Enter one Door: 1e 8. Accept 16" default value for Stud On-center Spacing: e 9. Accept 5% default value for Waste Factor and solve for Number of Studs: 44.
Extras Press C N to access the Extras functions. Continued presses of the N key will scroll through available functions. When you find the function you want, press e to begin prompting sequence.
Preference Settings Press C , then N to access the Extras functions. Press N until Preferences displays and press e . Continued presses of the e key will scroll through the different Preferences. The v and ^ keys scroll through the available options for each Preference. Press O to exit Preferences. Your calculator will keep your Preference Settings until a Full Reset alters your settings to the default values. You can change your Preferences at any time.
DESCRIPTION Fractional Resolution U.S. vs. Metric Mode Area Answer Format Volume Answer Format Target vs. Maximum Stair Riser Rake Wall Display Order Jack Rafter Display Order Jack Rafter Alignment Run vs. Span Entry Linear Meter Rounding Decimal Degree Rounding Mathematical Operation Fractional Mode 44 DEFAULT 1/16 U.S.
Elliptical Arch Function Required Entries Possible Solutions Height Width Stud On-center Spacing • Default value: 16" Stud Location • Default setting: Outside the Arch* Center to Foci Length Foci to Foci Length String Point-to-Point Length String Loop Length Arch Area Center Stud Length Other Stud Lengths Optional Entries Base Height * Stud Position or Location refers to the placement of the studs: • Entering 1 calculates studs located Outside of the Arch • Entering 2 calculates studs located Inside of
EXAMPLE: Solve for an Elliptical Arch that is 5' high, 15' wide and has a Base Height of 3'. Studs are Outside the Arch: 1. Clear Calculator: OOO 2. Go to Extras function: CN (If necessary, continue pressing N until ELLIPTICAL ARCH displays.) 3. Start Elliptical Arch function: e 4. Enter Elliptical Arch Height: 5fe 5. Enter Elliptical Arch Width: 15fe 46 6.
7. Accept 16" default value for Stud O.C. Spacing: e 8. Accept default Stud Position (Outside the Arch) and solve for Elliptical Arch: e e e e e e e e e CENTER TO FOCI LNTH FOCI TO FOCI LNTH STRING PT. TO PT. LNTH STRING LOOP LNTH ARCH AREA CENTER STUD LNTH STUD PAIR LENGTH Ø1 STUD PAIR LENGTH Ø2 STUD PAIR LENGTH Ø3 5 FEET 7-1/16 INCH 11 FEET 2-3/16 INCH 15 FEET 0 INCH 26 FEET 2-3/16 INCH 235.
e e e STUD PAIR LENGTH Ø4 STUD PAIR LENGTH Ø5 STUD PAIR LENGTH Ø6 4 FEET 5-13/16 INCH 5 FEET 8-1/2 INCH 8 FEET 0 INCH Battery This model uses one CR2025 battery (included). This should last approximately 800 hours of actual use (1 year plus for most people). Should your calculator display become very dim or erratic, replace the battery. Note: Please use caution when disposing of your old batteries, as they contain hazardous chemicals.
Reset If your calculator should ever “lock up,” press Reset – a small hole located above the o key – to perform a total reset. The calculator will return to its factory Default Settings and Preferences. Warranty and Repairs Your calculator has a full one-year limited warranty. For complete details about Warranty and Repairs, go to www.calculated.com.
For a complete list of keystrokes and Preference Settings, or more examples, visit: 4840 Hytech Drive Carson City, NV 89706 U.S.A. 1-800-854-8075 Fax: 1-775-885-4949 E-mail: info@calculated.com www.calculated.com PRG4067E-A www.calculated.
