Calculated Industries Construction Master III User Manual page 39

Common Rafter
— Pitch Known
The roof you are working on has a 7-in-12
Pitch, and you know the overall span of the
building is 23 feet 6 inches. What length should
you cut the common rafters (not counting the
overhang or ridge adjustment)?
COMMENTS
Clear calculator
Enter Pitch
Calculate Run
Enter as Run
Find rafter length
23' 6"
KEYSTROKES
[On/C] [On/C]
7 [Inch] [Pitch]
23 [Feet] 6 [Inch]
[÷] 2 [=] 11 FT 9 IN
[Run]
[Diag]
Answer: 13 FT 7-15/64 IN
7/12 Pitch
User's Guide — 39