Hip Roof Unequal Pitch

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.

Hip roof unequal pitch.

The most common parameter is to maintain an equal ridge height over building sections with differing spans. Value must be greater than zero. Blind valleys simplify framing 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. Minor side roof pitch minor.

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. 62 is shown the manner in which the method represented in fig. Select the following information by using the drop downs to enter values in feet and inches. For example in an equal hip roof with an 8 12 pitch the pitch of the hip rafter would be 8 17.

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. Repeat the process on the adjacent pitch side of the hip rafter using adjacent hr miter line shift dimension tail of hr 1 in. Slope of hip end roof.

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. Draw the line a b in length equal to the runs of the common rafters on both the long and short sides of the hips. To get results you need to provide roof base dimensions length and width and roof pitch we assume it is identical for all sides. 58 may be varied to meet the requirements of roofs of unequal pitches.

Major side plan angle. All formulae are below the calculator. To maintain a consistant ridge height in these situations the roof pitch must be adjusted. The pitch of the unequal hip rafter can be expressed in relation to either the main roof or the secondary roof.