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Using DEWALT RAFTER SQUARE (continued)
6) Connect opposite ends of the square lines, which will give the
correct side cut angle. Note that rafters with opposite side cut angles
will be required for opposing hip rafters and valley rafters.
7) From the center of the side cut angle, lay out and mark the
rafter length on the measuring line, as obtained from Table 1, (You will
remember that we defined the measuring line on hip, valley and jack
rafters as along the center line on lop al the rafter.)
8) Alter marking the rafter length, mark a square line as shown
above, Now mark a bottom plumb cut line on the side of the rafter as
shown below left.
NOTE: If you are laying out a valley rafter, add a second plumb line 1/2
the thickness of the rafter from the plumb line just made, as shown
below right. This is the line along which the heel cut will be made on
the valley rafter to fit the intersecting plates.
SIDE CUT ANGLE
TOP PLUMB CUT LINE
CENTER OF THE SIDE CUT ANGLE
RAFTER LENGTH
SET AT 9 ON
HIP/VAL SCALE
T
T
2
D
D
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