Unequal Pitch Hip Roof

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.

Unequal pitch hip roof.

Major side plan angle. 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. For example in an equal hip roof with an 8 12 pitch the pitch of the hip rafter would be 8 17. Minor side roof pitch minor.

Slope of hip end roof. Select the following information by using the drop downs to enter values in feet and inches. One of users asked us to create calculator which will help him estimate hip roof parameters like rafter s lengths roof rise and roof area. The amount to be removed from each side must be separately determined according to the angle the hip makes with the plate.

Value must be greater than zero. Then scroll down the page the calculated results should look like the following. 90 00 37 32054 52 67946. Overview although uncommon there are situations where architectural parameters require off angle hip and valley roof construction.

Major side roof span building width ridge thickness 2. Unit run of the hip. Main rafter length to ridge. To maintain a consistant ridge height in these situations the roof pitch must be adjusted.

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. The most common parameter is to maintain an equal ridge height over building sections with differing spans. 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. How to precisely layout an split pitch hip roof rafter using rafter tools for iphone.

But here it will be different since the hip rafter doesn t lie at 45 degrees to the commons. All formulae are below the calculator. It will calculate the roof rafter lengths for an unequal overhang roof.