Unequal Pitch Hip Roof Framing

It will display the framing square usage for the slope angle of the hip rafter 27 50055 6 12.

Unequal pitch hip roof framing.

Framing a roof of uneven pitch. Next click on the hip angles button and then click on the hip valley rafter slope angle text. Select the following information by using the drop downs to enter values in feet and inches. 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.

To keep the porch roof framing as simple as possible we installed a structural ridge supported by posts at each end with the common rafters landing on top of the ridge. It remains for the student to make the applications to uneven pitches. Blind valleys simplify framing. Set your saw blade bevel angle to the 56 30993 to cut the hip rafter tail plumb cut on the 12 12 roof pitch side of the hip rafter.

It is the strongest type of roof because it is braced by four hip rafters. Overview although uncommon there are situations where architectural parameters require off angle hip and valley roof construction. The most common parameter is to maintain an equal ridge height over building sections with differing spans. It is advisable to prepare a framing plan as shown in fig.

Mark 3 perpendicular lines on the top edge of the hip rafter using these dimensions. Framing a roof of uneven pitch. 90 00 37 32054 52 67946. 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.

The hip roof has four sloping sides. Find the hip s unit run as in figure 3b. 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. All of the principles necessary for framing such a roof have been developed.

Not infrequently a roof must be framed in which several pitches are involved. 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. These hip rafters run at a 45 angle from each corner of the building to the ridge.