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86 — S
HEET METAL/HVAC PRO CALC
Plumb: Vertical Cut. The angle of cut from the edge of the board
that allows the rafter to mate on the vertical side of the ridge rafter.
Level: Horizontal Cut. The angle of cut from the edge of the board
that allows the rafter to seat flat on the wall plate.
Cheek: Side Cut(s). The angle to cut from the SIDE of the Jack
rafter to match up against the Hip or Valley rafter, usually made by
tilting the blade from 90°. Jack rafters typically have one Cheek cut.
If there is only one Pitch (no Irregular Pitch), the angle will be 45°. If
there are two Pitches, each side will have a different Cheek cut for
the Jack rafter and the angles will total 90°.
Degree of Pitch
If the Degree of Pitch is 30.45°, what is the Percent Grade, Slope
and Pitch in Inches?
KEYSTROKE DISPLAY
o o 0.
3 0 • 4 5 p /
_
Ø 30.45°
p %GRD 58.78702
p SLP 0.58787
p PTCH 7-1/16 INCH
Note: To convert Pitch in Inches: Simply enter the Pitch in Inches first (e.g., 7 i
p), then continuously press the p key to calculate the Pitch conversions, as above.
Percent Grade
If the Percent Grade is 47.25%, what is the Slope, Pitch in Inches,
and Degree of Pitch?
KEYSTROKE DISPLAY
o o 0.
4 7 • 2 5 Ç +* p %GRD 47.25
p SLP 0.4725
p PTCH 5-11/16 INCH
p /
_
Ø 25.29073°
*Note: For entering Percent Grade, you need to label the value with the Percent key.
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