Calculated Industries 4065 v3.1 User Guide User Manual
Page 69
U
SER
’
S
G
UIDE
— 61
(Cont’d)
KEYSTROKE
DISPLAY
3. Find regular incremental Jack adjustment and regular Jack rafter
lengths and cut angles:
j
JKOC
16
INCH
*
j
INCR 1
FEET
6-1/2
INCH
j
JK 1 8
FEET
2-3/8
INCH
j
JK 2 6
FEET
7-7/8
INCH
j
JK 3 5
FEET
1-3/8
INCH
j
JK 4 3
FEET
6-13/16
INCH
j
JK 5 2
FEET
0-5/16
INCH
j
JK 6 0
FEET
5-13/16
INCH
j
JK 7 0
FEET
0
INCH
j
PLMB 30.26°
j
LEVL 59.74°
j
CHK1 45.00°
*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
DISPLAY
1. Enter Pitch, Run and spacing:
o o
0.
9 i p
PTCH 9
INCH
6 f 9 i R
RUN 6
FEET
9
INCH
1 8 i ß 5
(o.c.)
OC
18
INCH
2. Find regular incremental Jack adjustment and regular Jack rafter
lengths and cut angles:
j
JKOC
18
INCH
j
INCR 1
FEET
10-1/2
INCH
j
JK 1 6
FEET
6-3/4
INCH
j
JK 2 4
FEET
8-1/4
INCH
j
JK 3 2
FEET
9-3/4
INCH
j
JK 4 0
FEET
11-1/4
INCH
j
JK 5 0
FEET
0
INCH
j
PLMB 36.87°
j
LEVL 53.13°
j
CHK1 45.00°
3. Reset On-center spacing to default 16-inch:
1 6 i ß 5
(o.c.)
OC
16
INCH
STORED
STORED
STORED
STORED