Unequal Pitch Hip Roof Framing

Find the hip s unit run as in figure 3b.

Unequal pitch hip roof framing.

A disadvantage of the hip roof is that it is more difficult to construct than a gable roof. Since you need only one set of numbers to lay out the cuts let s work with the main roof which has a unit rise of 8 inches. Overview although uncommon there are situations where architectural parameters require off angle hip and valley roof construction. 90 00 37 32054 52 67946.

It is the strongest type of roof because it is braced by four hip rafters. The hip roof framing calculator returns the value of the main rafter the side rafter the length of the hip the height of the knee wall and the lengths of the jack rafters. Framing a roof of uneven pitch. These hip rafters run at a 45 angle from each corner of the building to the ridge.

It remains for the student to make the applications to uneven pitches. To maintain a consistant ridge height in these situations the roof pitch must be adjusted. Not infrequently a roof must be framed in which several pitches are involved. All of the principles necessary for framing such a roof have been developed.

The pitch of the unequal hip rafter can be expressed in relation to either the main roof or the secondary roof. The most common parameter is to maintain an equal ridge height over building sections with differing spans. It will display the framing square usage for the slope angle of the hip rafter 27 50055 6 12. The hip roof has four sloping sides.

Using a pitch measuring tool that i d made we also determined that the exact pitch of the shed roof was 3 1 2 in 12. Select the following information by using the drop downs to enter values in feet and inches. Next click on the hip angles button and then click on the hip valley rafter slope angle text. Mark 3 perpendicular lines on the top edge of the hip rafter using these dimensions.

Which is the hip rafter side cut angle at the foot of the hip rafter on the 8 12 roof pitch side of the roof. It is advisable to prepare a framing plan as shown in fig. Blind valleys simplify framing.