User's Guide — 47
Regular (45°) Hip/Valley
& Jack Rafters
You’re working with a 7/12 Pitch,
and half your total span is 13 feet 9
inches: (A) Find the point-to-point
length for the common rafter; (B) Find
the length of an adjoining hip (or val-
ley) and; (C) Find the lengths of the
regular jack rafters (jack rafters at 16”
on-center spacing).
Keystroke Display
[On/C] [On/C]
0.
1. Find Common Rafter Length
13 [Feet] 9 [Inch] [Run]
RUN 13 FT 9 IN
7 [Inch] [Pitch]
PTCH 7 IN
[Diag]
DIAG 15 FT 11 IN
2. Find Hip Rafter Length
[Hip/V]
H/V 21 FT 0-7/16 IN
3. Find Jack Rafter Lengths
16 [Inch] [Jack]
OC 16 IN
[Jack]
JK1 14 FT 4-1/2 IN
[Jack]
JK2 12 FT 10 IN
[Jack]
JK3 11 FT 3-7/16 IN
Etc......Continue pressing [Jack] until last Jack
is reached or until display shows “0.”
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