Calculated Industries 4065 v3.0 - Manual (Page 65)

64 — C ONSTRUCTION M ASTER ® P RO / T RIG / D ESKTOP
Common Rafter Length
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?
Note: Run is half the Span.
KEYSTROKE DISPLAY
1. Find diagonal or point-to-point length of the Common rafter:
o o 0.
7 i p PTCH 7 INCH
1 4 f 4 i ÷ 2 = 7 FEET 2 INCH
R RUN 7 FEET 2 INCH
d DIAG 8 FEET 3-9/16 INCH
2. Find Plumb and Level cuts:
d PLMB 30.26°
d LEVL 59.74°
Note: The Common rafter calculation is the "point-to-point" length and does not
include the overhang or ridge adjustment.
Common Rafter Length — Pitch Unknown
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 degrees
and in inches.
KEYSTROKE DISPLAY
Find diagonal and pitch:
o o 0.
6 f 1 1 i 1 / 2 r RISE 6 FEET 11-1/2 INCH
1 4 f 6 i R RUN 14 FEET 6 INCH
d DIAG 16 FEET 1 INCH
p PTCH 5-3/4 INCH
p PTCH 25.64°
4065UG-E-B 6/9/04 1:50 PM Page 64