Unequal Pitch Hip Roof

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.

Unequal pitch hip roof.

Select the following information by using the drop downs to enter values in feet and inches. To maintain a consistant ridge height in these situations the roof pitch must be adjusted. The amount to be removed from each side must be separately determined according to the angle the hip makes with the plate. 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.

To get results you need to provide roof base dimensions length and width and roof pitch we assume it is identical for all sides. It will calculate the roof rafter lengths for an unequal overhang roof. Overview although uncommon there are situations where architectural parameters require off angle hip and valley roof construction. Major side plan angle.

But here it will be different since the hip rafter doesn t lie at 45 degrees to the commons. The backing of hips on roofs of uneven pitches while the amount to be removed on each side of the hip will vary is determined by the principles developed in sec. Then scroll down the page the calculated results should look like the following. For example in an equal hip roof with an 8 12 pitch the pitch of the hip rafter would be 8 17.

Major side roof span building width ridge thickness 2. 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. 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. Minor side roof pitch minor.

90 00 37 32054 52 67946. Main rafter length to ridge. The most common parameter is to maintain an equal ridge height over building sections with differing spans. All formulae are below the calculator.

How to precisely layout an split pitch hip roof rafter using rafter tools for iphone. Value must be greater than zero. Unit run of the hip.