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What is the cut at the top of the rafter called?
Plumb cut
Plumb cut, typically called the ridge cut, at the top end of the rafter.
How do you calculate hip roof?
Hip capping To find the length of ridge capping required to cover one hip, measure the distance from the ridge line to the fascia on the roof plan (here 4000mm) and the gutter overhang and multiply by the Hip Length Roof Slope Factor for 30 degrees. Multiply by 4.
What is a valley cut?
With cut valleys, shingles from one roof slope extend several feet onto the adjacent slope, and shingles from the adjacent slope are cut parallel and just short of the center of the valley. In good installations, the top corner of the shingles are clipped to help route any cross-wash back into the valley.
What size should a hip rafter be?
The rule of thumb is that hips, purlins and ridge boards are at least 1.5 times the depth of the rafter.
How do I calculate my hip roof?
Don’t measure each face if the hip roof is square; just measure one face and multiply the area by 4 to find the measurement of the entire roof. For parallelogram-shaped faces, measure one face of each size and multiply the areas of each by 2 to find the total measurement.
What is the ridge of a hip roof?
The ridge of a hip roof is equal to the length of the building minus twice the run plus the thickness of the rafter stock. Layout is from the center of the first common rafter. In the example at left the run is 10′.
How are rafters shortened at the top?
The method of shortening at the top is different. (Common rafters are shortened 1/2 the ridge thickness.) (hip rafters are shortened 1/2 the 45 degree angle of the rafter stock) The odd unit must be accounted. for. Study the diagram below.
How is a hip rafter laid out?
A hip rafter is laid out just like a common rafter with a few twists. We use 17 (16.97) on the square instead of 12. The method of shortening at the top is different. (Common rafters are shortened 1/2 the ridge thickness.) (hip rafters are shortened 1/2 the 45 degree angle of the rafter stock)
What is the thickness of a 45 degree hip rafter?
(The 45° thickness is the length of a line laid at 45° across the thickness of the board.) However, if the hip rafter is framed against the common rafters, using a double side cut, the shortening allowance is one-half the 45° thickness of a common rafter.