Irregular Hip/Valley And Jack Rafters - Victor C6000 Instruction Manual

IRREGULAR HIP/VALLEY AND JACK RAFTERS - ON-CENTER SPACING MAINTAINED
Example: You're working with a 7/12 Pitch and half your overall span is 5 Feet. The irregular Pitch is
8/12, and 16-inch On-center spacing is maintained 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.
KEY INPUT & DISPLAY
1. Find Common rafter length:
On/C On/C
7
Inch
Pitch
5
Feet
Run
Diag
2. Enter On-center spacing:
1 6
Stor
Inch
3. Find Irregular Hip/Valley rafter length and cut angles:
8
Inch Conv Hip/V
Hip/V
Hip/V
Hip/V
Hip/V
Hip/V
4. Find irregular incremental jack adjustmental jack adjustment and Irregular Jack lengths:
(Ir/Jack)
Conv Jack
Jack
Jack
Jack
Jack
Jack
5
(o.c.)
(Ir/Pitch)
Page 38
0
PTCH 7
Inch
RUN 5 0
Feet Inch
DIAG 5 9-7/16
Feet Inch
OC 16
STORED
Inch
IPCH 8
Inch
IH/V 7 3-1/16
Feet Inch
PLMB 32.70˚
LEVL 66.30˚
CHK1 41.19˚
CHK2 48.81˚
IJOC 16
STORED
Inch
INCR 1 4-13/16
Feet Inch
IJ1 3 10-1/4
Feet Inch
IJ2 2 5-7/16
Feet Inch
IJ3 1 0-5/8
Feet Inch
IJ4 0 0
Feet Inch
Cont'd on page 40