Supplementary Document

POCKET REFERENCE GUIDE — 25
KEYSTROKE DISPLAY
1. Use trigonometry formula (divide the
rise by the hypotenuse):
o o 0.
6 f ÷ 1 0 f = 0.6
2. Solve for angle or degrees:minutes:sec-
onds:
Ç ç (cos
-1
) 53.13°
Ç •
(dms deg) DMS 53.07.48
Common Rafter Length
Find the point-to-point length of the
Common rafter on a 7/12-pitched roof
with a span of 28 Feet. What are the
angle cuts?
KEYSTROKE DISPLAY
1. Enter Pitch:
o o 0.
7 i p PTCH 7
INCH
2. Enter half the span as the run:
2 8 f ÷ 2 = 14 FEET 0 INCH
R RUN 14 FEET 0 INCH
3. Find the Common and cuts:
d DIAG 16 FEET 2-1/2 INCH
d PLMB 30.26°
d LEVL 59.74°