Calculated Industries 4065 - Irregular Hip;Valley and Jack Rafters - Descending, with On-Center Spacing Maintained

62 — C ONSTRUCTION M ASTER
®
P RO / T RIG / D ESKTOP
Irregular Hip/Valley and Jack Rafters — Descending, with
On-Center Spacing Maintained
You’re working with a 7/12 Pitch and half your overall span is 4 Feet.
The irregular Pitch is 8/12, and 16-inch On-center spacing is main-
tained on both sides. Complete the following steps:
(1) Find the length of the common rafter;
(2) Reset calculator to 16-inch On-center spacing;
(3) Enter the Irregular Pitch; find the length of the adjoining
“Irregular” Hip (or Valley) and the cut angles;
(4) Find the incremental jack adjustment and the jack lengths on
the “Irregular” Pitch side (16-inch On-center spacing);
(5) Find the cut angles;
(6) Find the incremental jack adjustment and the jack lengths on
the “Regular” Pitch side (16-inch On-center spacing);
(7) Find the cut angles.
KEYSTROKE DISPLAY
1. Find Common rafter length:
o o 0.
7 i p PTCH 7 INCH
4 f R RUN 4 FEET 0 INCH
d DIAG 4 FEET 7-9/16 INCH
2. Enter On-center spacing:
1 6 i ß 5 (o.c.) OC 16 INCH
3. Find Irregular Hip/Valley rafter length and cut angles:
8 i Ç H (Ir/Pitch) IPCH 8 INCH
H IH/V 5 FEET 9-11/16 INCH
H PLMB 23.70°
H LEVL 66.30°
H CHK1 41.19°
H CHK2 48.81°
(Cont’d)
STORED