Calculated Industries 4067 User Manual

he Construction Master Plus EZ (CMP EZ) is the newest in

Calculated Industries′ line of award-winning Construction Master Plus 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. After entering the inputs, you can

then

scroll through all the available calculations and solutions. You

can also change an input (or multiple inputs) and then re-solve the problem, instantly seeing how the new entry changes calculations without having to re-enter the entire problem.

The Construction Master Plus EZ has Basic and Advanced solutions (lengths, angles, quantities, etc.) for these construction calculations:

● Rafters

● Hip/Valley Rafters

● Jack Rafters

● Stairs

Other solutions include

● Square-Ups, Areas and Volumes

● Circular

● Arcs

● Rake Walls

● Arch Studs

● Balusters ─ Cap Wall and Open Wall

● Elliptical Arches

● Crown Molding

● Compound Angles

● Polygons

● Spacing

● Material Calculations for Blocks, Drywall, Fencing, Footings, Pavers, Roong, Studs, Tile and Grout

TABLE OF CONTENTS

GETTING STARTED

Key Denitions ..........................................................................................2

Basic Function Keys ..............................................................................2

Dimensional Function Keys ...................................................................2

Weight and Volume Function Keys ....................................................... 2

Miscellaneous Functions .......................................................................2

Construction and Prompting Keys .........................................................3

USING THE CONSTRUCTION MASTER PLUS EZ

Default Values ...........................................................................................3

Functions — U.S. Mode ........................................................................ 3

Functions — Metric Mode .....................................................................3

Materials — U.S. Mode ......................................................................... 4

Materials — Metric Mode ......................................................................4

Extras — U.S. Mode ..............................................................................4

Square-Up and LxWxH Functions ............................................................. 4

Square-Up .............................................................................................4

Extras — Metric Mode ........................................................................... 4

LxWxH ................................................................................................... 4

Rafter Function .......................................................................................... 5

Basic Rafters .........................................................................................5

Advanced Rafters .................................................................................. 5

Hip/Valley Rafter Function ......................................................................... 5

Basic Hip/Valley Rafters ........................................................................ 5

Advanced Hip/Valley Rafters .................................................................6

Advanced Function with Common Pitch ................................................6

Advanced Function with Irregular Pitch ................................................. 6

Jack Rafter Function .................................................................................6

Basic Jack Rafters .................................................................................6

Jack Rafters – Advanced Function ........................................................7

Stair Function ............................................................................................7

Basic Stairs ...........................................................................................8

.......................................................................................2

......................................... 3

ConstruCtion Master Plus eZ

Advanced Stairs .................................................................................... 8

Circular Function .......................................................................................9

Rake Wall Function ...................................................................................9

Arc Function ............................................................................................10

Arch Stud Function .................................................................................. 10

Baluster Function .................................................................................... 11

Cap Wall .............................................................................................. 11

Open Wall ............................................................................................ 11

Materials Functions ................................................................................. 11

Blocks .................................................................................................. 11

Drywall .................................................................................................12

Fencing ................................................................................................12

Footings ...............................................................................................12

Pavers .................................................................................................13

Roong ................................................................................................13

Studs ................................................................................................... 13

Tile .......................................................................................................14

Extras ......................................................................................................14

Preference Settings ............................................................................. 14

Elliptical Arch Function ........................................................................15

Crown Molding Function ......................................................................15

Compound Angle Function .................................................................. 16

Polygon Function .................................................................................16

Spacing Function .................................................................................16

GettinG Started

KEY DEFINITIONS

Basic Function Keys

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.

Within an output sequence, pressing once exits the prompt function, but does not clear non-permanent values. Pressing twice clears non-permanent values.

Off – Turns all power of f. Clears all non-permanent memory.

+-x ÷=

– 9 and

Dimensional Function Keys

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.

Store – Used for storing values.

Accumulative Memory – Adds displayed value to

Accumulative Memory.

M- – Subtracts displayed value from Accumulative Memory.

Yards – Identies entry as yards, with repeated presses

toggling bet ween linear, area and volume units.

Feet – Identies entry as Feet, with repeated presses

toggling bet ween linear, area and volume units. Also

used with

Repeated presses during conversions toggle between fractional Feet-Inch and decimal Feet.

and / keys for entering Feet-Inch values.

Inch – Identies entry as Inches, with repeated presses

toggling bet ween linear, area and volume units. Entry can be whole or decimal numbers. Also used with entering fractional inch values (e.g., Repeated presses during conversions toggle between fractional and decimal inches.

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.

Meters – Identies entry as meters, with repeated presses

toggling bet ween linear, area and volume units. Converts dimensional value to units of meters, with repeated presses toggling bet ween meters and millimeters.

Weight and Volume Function Keys

C6 C1

Miscellaneous Functions

CR0

C+

C-

C÷

Centimeters (cm) – Identies entry as centimeters, with repeated presses toggling between linear, area and volume units.

Millimeters (mm) – Identies entry as millimeters, with repeated presses toggling between linear, area and volume units.

Board Feet (Bd Ft) – Enters or converts cubic values to Board Feet. One Board Foot is equal to 144 cubic inches.

Acre – Enters or converts a square value to Acres.

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.

● Tons per cubic yard

● Pounds per cubic yard

● Pounds per cubic feet

Pounds (lbs) – Enters or converts a weight or volume value to pounds.

Metric Tons (met tons) – Enters or converts a weight or volume value to metric tons.

Tons – Enters or converts a weight or volume value to tons.

Kilograms (kg) – Enters or converts a weight or volume

value to kilograms.

Backspace Function – Used to delete entries one keystroke

at a time (unlike the entry).

Percentage – Used to nd 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.

Unit Cost – Stores the Unit Cost for calculating the total cost. To recall this setting, press (no Unit Cost).

Degrees:Minutes:Seconds (dms◄►deg) – Converts between D:M:S and decimal degree formats; repeated presses will toggle between the two formats.

Square Root (√¯

number on the display.

Pi – Displays value of π (3.1415927).

Change Sign (+/–) – Toggle displayed value between

negative and positive value.

Clear All – Returns all stored values to the default settings. Does not affect Preference Settings.

Reciprocal (1/x) – Finds the Reciprocal of a number (e.g.,

8C÷ =

x) – Calculates the Square Root of the

0.125).

for

6f9i1/2

● Pounds per cubic inch

● Metric tons per cubic meter

● Kilograms per cubic meter

function, which deletes the entire

. Default is 0.00

ConstruCtion Master Plus eZ

Construction and Prompting Keys

Complete listings of required and optional entries and the resulting solutions are in the Construction Examples section.

Square Up – Calculates the Square-Up (diagonal) length,

Area and Perimeter when Length and Width are entered.

LxWxH – Calculates Volume, Wall Surface Area, Wall + Ceiling Area, Square- Up, Area and Perimeter when Length, Width and Height are entered.

Rafter (Basic) – Calculates basic lengths and angles

for Rafters.

Rafter (Advanced) – Calculates basic lengths and angles for Rafters.

Hip/Valley (Basic) – Calculates basic lengths and angles for

Regular and Irregular Hip/ Valley rafters.

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 raf ters.

Jack Rafter (Advanced) – Calculates advanced lengths and angles for Regular and Irregular Jack rafters.

Stair (Basic) – Calculates values for Stairs when Floor-to-

Floor Rise and/or Stair Run is entered.

Stair (Advanced) – Calculates values for Stairs, allowing for Upper and Lower Flooring Thickness, Nosing Length and Riser Thickness for additional calculations.

Circular – Calculates for Diameter, Radius, Perimeter or Area

when one of these values is entered. Enter Height and one of the other four values to calculate Cones and Columns.

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 Stud – 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.

Materials – Accesses functions for Blocks, Dr ywall, Fencing,

Footings, Pavers, Roong, Studs and Tile.

Extras – Accesses functions for Elliptical Arches, Crown Molding, Compound Angles, Polygons and Spacing. Also used to access Preferences for customizable settings (see

Preference Settings on page 17).

Up Arrow – Used to scroll up (or back) through prompts and

entries.

Down Arrow – Used to scroll down (or forward) through

prompts and entries.

Enter – Used to enter or accept values.

Solve – Used to skip the remaining entry prompts and proceed to the rst available solution for the chosen function.

USinG the ConStrUCtion MaSter PlUS eZ

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. After entering the inputs, you can then scroll through all the available calculations and solutions. You can also change an input (or multiple inputs) and then re-solve the problem, instantly seeing how the new entry changes calculations without having to re-enter the entire problem.

You can also use the input prompts and go directly to the solution.

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 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. AND METRIC MODES

The Construction Master Plus EZ can be used in either U.S. Mode (the calculator’s default setting), which uses inches, or Metric Mode, which uses millimeters, as a basis for entries and calculations. To change the Mode, go to Preferences, using the Extras function (

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

(

Roong calculations are based on 4' x 8' Sheathing Size.

Common Rafter

• Ridge Thickness 1-1/2"

• Rafter Width 7-1/4"

• Plate Width 3-1/2 "

Jack Rafter

Rake Wall

• O.C. Spacing 16"

• Top Plate Thickness 1-1/2"

Common Rafter

• Ridge Thickness 38 mm

• Rafter Width 200 mm

• Plate Width 1 0 0 m m

Jack Rafter

• O.C. Spacing 400 mm

• Rafter Thickness 38 mm

• Hip/V Thickness 38 mm

• Ridge Thickness 38 mm

Rake Wall

• O.C. Spacing 400 mm

• Top Plate Thickness 38 mm

) will reset values to the calculator’s Default Values.

Functions — U.S. Mode

• O.C. Spacing 16"

• Rafter Thickness 1-1/2"

• Hip/V Thickness 1-1/2"

• Ridge Thickness 1-1/2"

Functions — Metric Mode

(Solve) function to skip any remaining

key to power it

Baluster/Open Baluster

• Maximum Spacing 4"

Hip/ Valley

• Ridge Thickness 1-1/2"

Stairs

• Target Riser Height 7-1/2"

• Target Tread Width 10"

• Top Floor Thickness 10"

• Headroom Height 80"

Arch Studs

• O.C. Spacing 16"

• Location: 1 = Outside

Baluster/Open Baluster

• Maximum Spacing 100 mm

Hip/ Valley

• Ridge Thickness 38 mm

Stairs

• Target Riser Height 190 mm

• Target Tread Width 250 mm

• Top Floor Thickness 250 mm

• Headroom Height 2 1 0 0 m m

Arch Studs

• O.C. Spacing 400 mm

• Location: 1 = Outside

ConstruCtion Master Plus eZ

Materials — U.S. Mode

Blocks

• Block Height 8″

• Block Length 16″

• Waste Factor 5%

Drywall Sheets

• Include Ceiling: 1 = Yes

• Sheet Length 8′

• Sheet Width 4′

• Waste Factor 5%

Fencing

• Number of Rails 2

• Maximum Post Spacing 96″

• Post Width 3-1/2′

Footings

• Footing Area 264 Sq Inches

• Waste Factor 5%

Pavers

• Paver Length 8"

• Paver Width 4"

• Waste Factor 5%

Materials — Metric Mode

Blocks

• Block Height 215 mm

• Block Length 440 mm

• Waste Factor 5%

Drywall Sheets

• Include Ceiling: 1 = Yes

• Sheet Length 2400 mm

• Sheet Width 1200 mm

• Waste Factor 5%

Fencing

• Number of Rails 2

Maximum

• Spacing

• Post Width 69 mm

Footings

• Footing Area 0.2 sq m

• Waste Factor 5%

Pavers

• Paver Length 215 mm

• Paver Length 102.5 mm

• Waste Factor 5%

Extras — U.S. Mode Extras — Metric Mode

Elliptical Arch

• O.C. Spacing 16″

• Position 1 = Outside

Crown Molding

• Corner Angle 90°

• Spring Angle 45°

Spacing

• Object Width 1 - 1 / 2 ″

• End Position 1 = Beginning

• Mark Position 2 = On-Center

Post

2.4 m

Roong

• Waste Factor 5%

• Number of Nails

per Shingle

• Length of Nail 1-1/4″

• Number of Pieces

per Bundle

• Number of Bundles

per Square

Drywall Sheets

• Include Ceiling: 1 = Yes

• Sheet Length 8′

• Sheet Width 4′

• Waste Factor 5%

Studs

• O.C. Spacing 16″

• Waste Factor 5%

Tile

• Grout Width 1/8″

• Tile Thickness 1/4″

• Waste Factor 5%

• Backer Board Size 3′ x 4′

Roong

• Sheathing Size

• Number of Nails per Shingle

• Length of Nail 30 mm

• Number of Pieces per Bundle

• Number of Bundles per Square

• Waste Factor 5%

Studs

• O.C. Spacing 400 mm

• Waste Factor 5%

Tile

• Grout Width 2 mm

• Tile Thickness 7 mm

• Waste Factor 5%

• Backer Board Size 1200 mm

Elliptical Arch

• O.C. Spacing 400 mm

• Position 1 = Outside

Crown Molding

• Corner Angle 90°

• Spring Angle 45°

Spacing

• Object Width 38 mm

• End Position 1 = Beginning

• Mark Position 2 = On-Center

1200 mm x

2400 mm

CONSTRUCTION EXAMPLES

For each of the functions shown in the User’s Guide there is a box showing 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

Note: After scrolling through all your entries and solutions, the calculator will display REPEAT briey before returning to the rst input prompt. You can then scroll through and view (or change) entries and solutions. It’s recommended that you allow the REPEAT message to disappear before continuing to scroll through the function. Not doing so will skip the rst input prompt.

key, the ^ key or the v key.

SQUARE-UP AND LxWxH FUNCTIONS

Square-Up

Required Entries Solutions

Length

Width

Enter a 15′ 8" Length and a 12′ 6" Width:

1. Clear Calculator:

Square-Up Area Perimeter

OOO

2. Start Square- Up function:

3. Enter 15′ 8" Length:

15f8ie

4. Enter 12′ 6" Width and solve for Square- Up:

12f6ie

SQUARE-UP

AREA

PERIMETER

LxWxH

Entries Solutions

Length

Width

Height

Enter a 15′ 8" Length, 12′ 6" Width and 4" Height:

1. Clear Calculator:

Volu me Vertical Surface Area Vertical + LxW Surface Area Square-Up LxW Area Perimeter

20 FEET 0-1/2 INCH

195.83333 SQ FEET

56 FEET 4 INCH

OOO

2. Start Length x Width x Height function:

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

VOLUME

VERTICAL SURFACE AREA

VERTICAL + LxW AREA

SQUARE-UP

LxW AREA

PERIMETER

65.277778 CU FEET

18.777778 SQ FEET

214.61111 SQ FEET

20 FEET 0-1/2 INCH

195.83333 SQ FEET

56 FEET 4 INCH

ConstruCtion Master Plus eZ

RAFTER FUNCTION

Basic Rafters

Required Entries Possible Solutions

Two of these required:

• Pitch

• Run (or Span)

• Rise

• Common Rafter Length

Solve for Basic Rafters using an 8" Pitch and 12' Run:

1. Clear Calculator:

Common Raf ter Length Level Angle

Pitch

Plumb Angle Run Rise

OOO

2. Start Rafter function:

3. Enter 8" Pitch:

8ie

4. Enter 12′ Run and solve for Basic Rafters:

12fe

DIAGONAL

PLUMB ANGLE

LEVEL ANGLE

RISE

Advanced Rafters

Required Entries Possible Solutions

Two of these required:

• Pitch

• Run (or Span)

• Rise

• Common Rafter Length

Optional Entries

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 HAP entr y prompt and enter the desired value.

**Tail Length and Total Rafter Length shown only when Horizontal Overhang is entered.

Enter an 8" Pitch, a 12′ Run, an 18" Overhang and 2-1/4" Total Fascia Thickness:

1. Clear Calculator:

Common Raf ter Length Common Tail Length** Total Rafter Length** Plumb Angle Level Angle Seat Cut Standard 2/3 HAP Full Bearing HAP

Pitch

Run Rise

or 0. Then, press e to move to the

14 FEET 5-1/16 INCH

33.69 °

56.31 °

8 FEET 0 INCH

2. Start Advanced Rafter function:

3. Enter 8" Pitch:

8ie

4. Enter 12′ Run:

12fe

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:

8. Accept 7-1/4" default value for Rafter Width:

9. Accept 3 -1/2" default value for Top Plate Width and solve for Rafters:

COMMON RAFTER LNTH

TAIL LENGTH

TOTAL RAFTER LNTH

PLUMB ANGLE

LEVEL ANGLE

STANDARD 2/3 HAP

FULL BEARING HAP

RISE

HIP/VALLEY RAFTER FUNCTION

Basic Hip/Valley Rafters

Required Entries Possible Solutions

Two of the rst three required:

•

Common Pitch

•

Run (or Span)

•

Rise

Optional Entries

Irregular Pitch

Find the Hip/Valley Rafter Lengths and Angles using an 8" Common Pitch and a 12′ Run:

1. Clear Calculator:

Hip/Valley Length Plumb Angle Level Angle Common Cheek Angle Irregular Cheek Angle

14 FEET 4-3/16 INCH

19-3/8 INCH

15 FEET 11- 9/16 INCH

33.69°

56.31°

5- 13/16 INCH

6-3/8 INCH

8 FEET 0 INCH

OOO

2. Start Basic Hip/Valley function:

3. Enter 8" Common Pitch:

8ie

4. Enter 12′ Run:

12fe

5. No entr y for Irregular Pitch (Common Pitch used). Solve for Hip/ Valley values:

HIP/VALLEY LNTH

PLUMB ANGLE

LEVEL ANGLE

COMMON CHEEK ANGL

Find the Hip/Valley Rafter Lengths and Angles using an 8" Common Pitch, an 8′ Run and an Irregular Pitch of 10":

1. Clear Calculator:

18 FEET 9-1/8 INCH

25.24°

64.76°

45.00°

OOO

2. Start Basic Hip/Valley function:

3. Enter 8" Common Pitch:

8ie

4. Enter 8′ Run:

8fe

5. Enter 10" Irregular Pitch and solve for Hip/Valley values:

10ie

HIP/VALLEY LNTH

PLUMB ANGLE

LEVEL ANGLE

11 FEET 6-5/8 INCH

27.50°

62.50°

ConstruCtion Master Plus eZ

COMMON CHEEK ANGL

IRREGULAR CHEEK ANGL

Advanced Hip/Valley Rafters

Required Entries Possible Solutions

Two of the rst three required:

•

Common Pitch

•

Run (or Span)

•

Rise

Optional Entries

Irregular Pitch Horizontal Overhang Total Fascia Thickness Ridge Thickness

• Default value: 1-1/2"

* Tail Length shown only when Horizontal Overhang is entered.

Advanced Function with Common Pitch

Find Hip/Valley Lengths and Angles using an 8" Common Pitch, a 12′ Run, an 18" Horizontal Overhang and 2-1/4" Total Fascia Thickness:

1. Clear Calculator:

Total Hip/Valley Length Hip/Valley Tail Length* Plumb Angle Level Angle Common and Irregular

• Cheek Angle

• Backing Angle

• Sheathing Angle

• Plan Angle

38.66°

51.34°

OOO

2. Start Advanced Hip/Valley function:

3. Enter 8" Common Pitch:

8ie

4. Enter 12′ Run:

12fe

5. No Irregular Pitch (Common Pitch used):

6. Enter 18" Overhang*:

18ie

7. Enter 2-1/4" Total Fascia Thickness*:

2i1/4e

8. Accept 1-1/2" default value for Ridge Thickness* and solve for Hip/Valley:

TOTAL HIP/VALLEY LNTH

H/V RAFTER TAIL LNTH

PLUMB ANGLE

LEVEL ANGLE

COMMON CHEEK ANGLE

COMMON BACKING ANGL

COMMON SHEATHING ANGL

COMMON PLAN ANGL

* If the desired value is already displayed, there′s no need to re- enter it. Just press e

to accept it. The value you store will remain unchanged until you modify it or reset the calculator. Optional Entries only: If you don′t want to include an optional entry in your calculation, simply clear it by entering

Advanced Function with Irregular Pitch

Find Hip/Valley Lengths and Angles using an 8 " Common Pitch, a 12′ Run, a 10" Irregular Pitch, an 18" Overhang and 2-1/4" Total Fascia Thickness:

1. Clear Calculator:

20 FEET 9-7/8 INCH

25-7/8 INCH

25.24°

64.76°

45.00°

23.09°

50.24°

45.00°

OOO

2. Start Advanced Hip/Valley function:

3. Enter 8" Common Pitch:

8ie

4. Enter 12′ Run:

12fe

5. Enter 10" Irregular Pitch:

10ie

6. Enter 18" Overhang*:

18ie

7. Enter 2-1/4" Total Fascia Thickness*:

2i1/4e

8. Accept 1-1/2" Ridge Thickness* and solve for Hip/Valley:

TOTAL HIP/VALLEY LNTH

H/V RAFTER TAIL LNTH

PLUMB ANGLE

LEVEL ANGLE

COMMON CHEEK ANGL

IRREGULAR CHEEK ANGL

COMMON BACKING ANGL

IRREG BACKING ANGL

COMMON SHEATHING ANGL

IRREG SHEATHING ANGL

COMMON PLAN ANGL

IRREGULAR PLAN ANGL

* If the desired value is already displayed, there′s no need to re- enter it. Just press

to accept it. The value you store will remain unchanged until you modify it or

reset the calculator.

Optional Entries only: If you don′t want to include an optional entry in your calculation, simply clear it by entering

19 FEET 2– 9/16 INCH

23-3/4 INCH

27.50°

62.50°

38.66°

51.34°

20.27°

29.99°

56.35°

46.16°

51.34°

38.66°

JACK RAFTER FUNCTION

Basic Jack Rafters

Required Entries Possible Solutions

Two of the rst three required:

• Common Pitch

• Run (or Span)

• Rise

On-Center Spacing

• Default value: 16"

Optional Entries

Irregular Pitch

*On- Center Spacing is also a possible solution that displays when both of the following

are true: 1) Common and Irregular Pitches are not equal and 2) Jack Alignment Preference is set to MAT E, rather than ON-CENTER.

Find the Jack Rafter Lengths and Angles using an 8" Common Pitch and a 6′ Run:

1. Clear Calculator:

Common and Irregular

• Jack On-center Spacing*

• Offset Length

• Rafter Length

• Jack Rafter Lengths

• Plumb Angle

• Level Angle

• Cheek Angle

OOO

2. Start Jack Rafter function:

3. Enter 8" Common Pitch:

8ie

4. Enter 6′ Run:

6fe

5. No entr y for Irregular Pitch (Common Pitch used):

6. Accept default On-Center Spacing (16") and solve for Jack Rafters:

COMMON OFFSET LNTH 19-1/4 INCH

COMMON RAFTER LNTH 7 FEET 2-9/16 INCH

ConstruCtion Master Plus eZ

JACK RAFTER C-Ø1

JACK RAFTER C-Ø2

JACK RAFTER C-Ø3

JACK RAFTER C-Ø4

COMMON PLUMB ANGL

COMMON LEVEL ANGL

COMMON CHEEK ANGL

Find the Jack Rafter Lengths and Angles using a 6′ Run, a 4′ Rise and a 10″ Irregular Pitch:

1. Clear Calculator:

5 FEET 7-5/16 INCH

4 FEET 0-1/16 INCH

2 FEET 4-7/8 INCH

0 FEET 9-5/8 INCH

33.69°

56.31°

45.00°

OOO

2. Start Jack Rafter function:

3. No Common Pitch:

4. Enter 6′ Run:

6fe

5. Enter 4′ Rise:

4fe

6. Enter 10" Irregular Pitch:

10ie

7. Accept default On-Center Spacing (16") and solve for Jack Raf ters:

COMMON OFFSET LNTH

COMMON RAFTER LNTH

JACK RAFTER C-Ø1

JACK RAFTER C-Ø2

JACK RAFTER C-Ø3

COMMON PLUMB ANGL

COMMON LEVEL ANGL

COMMON CHEEK ANGL

IRREGULAR OFFSET LNTH

IRREGULAR RAFTER LNTH

IR JACK RAFTER I-Ø1

IR JACK RAFTER I-Ø2

IR JACK RAFTER I-Ø3

IR JACK RAFTER I-Ø4

IRREGULAR PLUMB ANGL

IRREGULAR LEVEL ANGL

IRREGULAR CHEEK ANGL

Jack Rafters – Advanced Function

Required Entries Possible Solutions

Two of the rst three required:

• Pitch

• Run (or Span)

• Rise

On-C enter Spacing*

• Default value: 16"

Optional Entries

Irregular Pitch Horizontal Overhang Total Fascia Thickness Common Raf ter Thickness** Hip/Valley Thickness** Ridge Thickness**

Common and Irregular

• Jack On-center Spacing*

• Offset Length

• Rafter Length

• Jack Rafter Lengths

• Plumb Angle

• Level Angle

• Cheek Angle

24-1/16 INCH

7 FEET 2-9/16 INCH

5 FEET 2-1/2 INCH

3 FEET 2-7/16 INCH

1 FEET 2-7/16 INCH

33.69°

56.31°

51.34°

16- 11/16 INCH

6 FEET 3 INCH

4 FEET 10-5/16 INCH

3 FEET 5- 5/8 INCH

2 FEET 1 INCH

0 FEET 8-5/16 INCH

39.81°

50.19°

38.66 °

* Default value: 1-1/2"

** On- center Spacing is also a possible solution that displays when both of the following

are true: 1) Common and Irregular Pitches are not equal and 2) Jack Alignment Preference is set to MAT E, rather than ON-CENTER.

** Tail Lengths shown only when Horizontal Overhang is entered.

Find the Jack Rafter Lengths and Angles using an 8" Pitch, a 6′ Run, an 18" Horizontal Overhang and the default values shown above:

1. Clear Calculator:

2. Start Advanced Jack Rafter function:

3. Enter 8" Common Pitch:

8ie

4. Enter 6′ Run:

6fe

5. No Irregular Pitch (Common Pitch used):

6. Accept default On-Center Spacing (16"):

7. Enter 18" Overhang Run:

18ie

8. No Total Fascia Thickness:

(Enter 0 if a value is displayed)

9. Accept 1-1/2" default Rafter Thickness:

10. Accept 1-1/2" default Hip/ Valley Thickness:

11. Accept 1-1/2" default Ridge Thickness and solve for Jack Rafters:

COMMON OFFSET LNTH 19-1/4 INCH

COMMON TAIL LNTH

COMMON RAFTER LNTH

JACK RAFTER C-Ø1

JACK RAFTER C-Ø2

JACK RAFTER C-Ø3

JACK RAFTER C-Ø4

JACK RAFTER C-Ø5

COMMON PLUMB ANGL

COMMON LEVEL ANGL

COMMON CHEEK ANGL

5 FEET 8-13/16 INCH

STAIR FUNCTION

Note: Within Preferences, there is a setting for Riser Height that determines which type of calculation will be used. The default is Target Riser Height.

• Target Riser Height: Use this setting to get a stair calculation that will get as

close to the stored Riser Height as possible. The calculated Actual Riser Height will either be shorter or taller than the Target Riser Height.

• Maximum Riser Height: This is used when local building codes prohibit risers

greater than this value. The calculated Actual Riser Height will not exceed the Maximum Riser Height.

19-1/4 INCH

21-5/8 INCH

8 FEET 11-1/4 INCH

7 FEET 4-1/16 INCH

4 FEET 1-9/16 INCH

2 FEET 6-3/8 INCH

0 FEET 11-1/8 INCH

33.69°

56.31°

45.00°

ConstruCtion Master Plus eZ

+ 16 hidden pages