Common Rafter

Common, 45° Hip/Valley and Jack Rafters Tutorial Video

Calculates the length of the Common rafter. The Common rafter calculation is the "point-to-point" length and does not include the overhang or ridge adjustment.

Related functions:

Examples:

1. If a roof has a 7/12 Pitch and a span of 14 Feet 4 Inches, what is the point-to-point length of the Common rafter (excluding the overhang or ridge adjustment)? What are the Plumb and Level cuts?

Keystroke Display
[Clear] [Clear] 0.
7 [Inch] [Pitch] Pitch
7 INCH
14 [Feet] 4 [Inch] [÷] 2 [=] 7 FEET - 2 INCH
[Run] RUN
7 FEET - 2 INCH
[Diag] Diagonal
8 FEET - 3 9/16 INCH
[Diag] Plumb Cut
30.26°
[Diag] Level Cut
59.74°


2. Find the Common rafter length for a roof with a rise of 6 Feet 11-1/2 Inches and a run of 14 Feet 6 Inches. Solve for the Pitch in Inches and in Degrees.

Keystroke Display
[Clear] [Clear] 0.
6 [Feet] 11 [Inch] 1 [/] 2 [Rise] Rise
6 FEET - 11 1/2 INCH
14 [Feet] 6 [Inch] [Run] Run
14 FEET 6 INCH
[Diag] Diagonal
16 FEET - 1 INCH
[Pitch] Pitch
5 3/4 INCH
[Pitch] Pitch
25.64°


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