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Using DEWALT RAFTER SQUARE (continued)
Jack rafters
Jack rafters tie in the same plane as common rafters, and
therefore have the same inch rise per foot run as common rafters.
1) At one end at the rafter, mark the top plumb cut line by setting
the pivot of the DEWALT Rafter Square on the rafter edge and rotating
the square about the pivot point until the edge of the rafter lines up at
the ‘9’ on the scale for COM/JACK.
2) Mark a line perpendicular to the top plumb cut line, as shown in
figure 4 page 30. Along this line measure and mark the thickness of the
rafter.
3) Mark a second plumb cut line at this point.
TOP PLUMB
CUT LINE
TOP PLUMB CUT LINE
RAFTER THICKNESS
T
T
RAFTER THICKNESS
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