
POCKET REFERENCE GUIDE — 25
Common Rafter Length
Find the point-to-point length of the
Common rafter on a 175/300 mm pitched
roof with a span of 8500 mm. What are
the angle cuts?
KEYSTROKE DISPLAY
1. Enter Pitch:
o o 0.
1 7 5 Ç 9 p PTCH 175. MM
2. Enter half the span as the run:
8 5 0 0 Ç 9 ÷ 2 = 4250. MM
R RUN 4250. MM
3. Find the Common and cuts:
d DIAG 4900. MM
d PLMB 29.86°
d LEVL 60.14°
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