Calculated Industries 44060 - Manual (Page 22)

20 — CONSTRUCTION MASTER   PRO
Hip/Valley and Jack Rafter Keys
Hip Rafter
Jack Rafters
16”
Common
Side
[Jack]
Irregular
Side
[I/Jack]
The
Construction Master Pro uses the rise, run, diagonal, pitch and
o.c. spacing values to compute
regular (45°) and irregular (non-45°)
Hip/Valley and Jack rafter lengths (
excluding wood thickness, etc.).
When calculating regular and irregular Jack rafter lengths, you will see
the letters “JK” (Common pitch side) or “IJ” (irregular pitch side) and the
corresponding Jack number to the left of your calculator display. This
will help you keep track of the descending sizes and which side the
corresponding rafter is based on.
[Hip/V] — Hip/Valley Rafter
Finds the regular (45º) or irregular (non-45º) Hip/Valley rafter length
.
• Regular Hip/Valley Length: After right triangle/rafter values
are entered or calculated (e.g., pitch, rise, run), pressing
[Hip/V] will calculate the length of the regular Hip/Valley
rafter.
• Irregular Hip/Valley Length: If an irregular pitch is entered via
[Conv] [Hip/V] (see next page), pressing [Hip/V] will calculate
the
irregular Hip/Valley rafter length. (An irregular or “non-
standard” roof has two different pitches/slopes.)