Not infrequently a roof must be framed in which several pitches are involved.
How to join an uneven roof.
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Unit run of the hip.
It is advisable to prepare a framing plan as shown in fig.
Draw a diagonal line between 9 feet the run of the main roof on the tongue of the square and 7 feet 6 inches the secondary roof run on the blade.
We measured from the ridge to the sleepers to get the lengths of the jacks and then cut them and fastened them into place.
Put on a pair of work gloves.
Framing a roof of uneven pitch.
Identify the roof areas that you will join.
This gives the angle of the hip rafter.
Remove the shingles and underlayment on the edges of both pitches approximately 6 inches from the edges using a shingle.
All of the principles necessary for framing such a roof have been developed.
In a hip roof with equal pitches the unit run of a hip or valley rafter is 17 inches for every 12 inches of run in the main roof.
It remains for the student to make the applications to uneven pitches.