86
—
S
HEET
M
ETAL
/HVAC
P
RO
C
ALC
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.
