Jack Rafters - Using Other Than 16-Inch On-Center Spacing - Calculated Industries 4065 User Manual

(Cont'd)
KEYSTROKE
3. Find regular incremental Jack adjustment and regular Jack rafter
lengths and cut angles:
j
j
j
j
j
j
j
j
j
j
j
j
*If display does not read JKOC 16 INCH (the default), then reset On-center spacing
by pressing 1 6 i ß 5 .
Jack Rafters — Using Other Than 16-Inch On-Center Spacing
A roof has a 9/12 Pitch and a run of 6 Feet 9 Inches. Find the incre-
mental jack adjustment, jack rafter lengths and cut angles at 18-inch
(versus 16-inch) On-center spacing. The On-center spacing is used
for both Regular and Irregular Jack calculations.
KEYSTROKE
1. Enter Pitch, Run and spacing:
o o
9 i p
6 f 9 i R
1 8 i ß 5 (o.c.)
2. Find regular incremental Jack adjustment and regular Jack rafter
lengths and cut angles:
j
j
j
j
j
j
j
j
j
j
3. Reset On-center spacing to default 16-inch:
1 6 i ß 5 (o.c.)
JKOC
STORED
INCR 1
FEET
JK 1 8
FEET
JK 2 6
FEET
JK 3 5
FEET
JK 4 3 6-13/16
FEET
JK 5 2 0-5/16
FEET
JK 6 0 5-13/16
FEET
JK 7 0
FEET
PLMB 30.26°
LEVL 59.74°
CHK1 45.00°
PTCH 9
RUN 6
FEET
OC
STORED
JKOC
STORED
INCR 1 10-1/2
FEET
JK 1 6
FEET
JK 2 4
FEET
JK 3 2
FEET
JK 4 0 11-1/4
FEET
JK 5 0
FEET
PLMB 36.87°
LEVL 53.13°
CHK1 45.00°
OC
STORED
U ' G
SER S
DISPLAY
16 *
INCH
6-1/2
INCH
2-3/8
INCH
7-7/8
INCH
1-3/8
INCH
INCH
INCH
INCH
0
INCH
DISPLAY
0.
INCH
9
INCH
18
INCH
18
INCH
INCH
6-3/4
INCH
8-1/4
INCH
9-3/4
INCH
INCH
0
INCH
16
INCH
— 61
UIDE