Calculated Industries 4045-B - Manual (Page 40)

40 — Construction Master IV
Jack Rafters — (with other than
16 inch on-center spacing)
You’re working with a roof having a
7/12 pitch and a run of 30 feet 9
inches. Find the jack rafter lengths at
18 inch on-center spacing.
Keystroke Display
[On/C] [On/C] 0.
1. Enter Pitch, Run and Spacing
7 [Inch] [Pitch] PTCH 7 IN
30 [Feet] 9 [Inch] [Run] RUN 30 FT 9 IN
18 [Inch] [Jack]* OC 18 IN
2. Find Jack Rafter Lengths
[Jack] JK1 33 FT 10-3/8 IN
[Jack] JK2 32 FT 1-1/2 IN
[Jack] JK3 30 FT 4-11/16 IN
Etc......Continue pressing [Jack] until
last Jack is reached or until display
shows “0.”
* If the entered value is not dimensioned, the
calculator will assume the value as inches
for English and millimeters for Metric calcu-
lations.