Manual

82 — CONSTRUCTION MASTER
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PRO
Area for Roofing Materials
Find the number of roofing rolls needed to cover a roof with a 5/12
pitch, an overall span of 27 feet and a length of 34 feet 6 inches. The
rolls measure 25 square feet each.
Keystroke Display
For the Handheld and Desktop:
1. Enter pitch and find area of roof:
[On/C] [On/C] 0.
5 [Inch] [Pitch] PTCH 5 INCH
27 [Feet] [x] 34 [Feet] 6 [Inch] [=] 931.5 SQ FEET
[Roof] (or [Conv] [00]) ROOF 1009.125 SQ FEET
2. Find number of rolls:
[÷] 25 [Feet] [Feet] [=] 40.365 (rolls)
For the LT and Trig Plus III:
1. Find Common rafter length:
[On/C] [On/C] 0.
5 [Inch] [Pitch] PTCH 5 INCH
27 [Feet] [÷] 2 [=] [Run] RUN 13 FEET 6 INCH
[Diag] DIAG 14 FEET 7-1/2 INCH
2. Find area of one side:
[x] 34 [Feet] 6 [Inch] [=] 504.5625 SQ FEET
3. Find area of both sides:
[x] 2 [=] 1009.125 SQ FEET
4. Find number of rolls:
[÷] 25 [Feet] [Feet] [=] 40.365 (rolls)