Calculated Industries 4065 v3.0 User Manual
Page 69
68 — 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 jack lengths on the “irregular” pitch side (16 inch
on-center spacing);
(5) Find the cut angles;
(6) Find 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
OC STORED 16
INCH
3. Find irregular Hip/Valley rafter length and cut angles:
8 i Ç H
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)
4065UG-E-B 6/9/04 1:50 PM Page 68