User's Guide — 49
Irregular (non-45° ) Hip/Valley
& Jack Rafters
You’re working with a 7/12 pitch and
half your overall span is 15 feet 7
inches. The irregular pitch is 8/12:
(A) Find the point-to-point length for the com-
mon rafter;
(B) Find the length of the adjoining “irregular”
hip (or valley);
(C) Find the jack lengths on the “irregular”
pitch side (16” o.c. spacing);
(D) Find the jack lengths on the “regular” pitch
side (16” o.c. spacing).
Keystroke Display
[On/C] [On/C]
0.
1. Find Common Rafter Length
7 [Inch] [Pitch]
PTCH 7 IN
15 [Feet] 7 [Inch][Run]
RUN 15 FT 7 IN
[Diag]
DIAG 18 FT 0-1/2 IN
2. Find Irregular Hip Rafter Length
8 [Inch] [Conv][Hip/V]
IPCH 8 IN
[Hip/V]
IH/V 22 FT 7-3/8 IN
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