Unequal Pitch Hip Roof

Major side roof pitch major.

Unequal pitch hip roof.

All formulae are below the calculator. It will display the framing square usage for the slope angle of the hip rafter 27 50055 6 12. The reason is it s an unequal pitch roof. 90 00 37 32054 52 67946.

Minor side roof pitch minor. Major side roof span building width ridge thickness 2. 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. For example in an equal hip roof with an 8 12 pitch the pitch of the hip rafter would be 8 17.

Select the following information by using the drop downs to enter values in feet and inches. Main roof rise 8 run 12 pitch. For a 4 overhang on the 11 side i get a drop of 3 8. Next click on the hip angles button and then click on the hip valley rafter slope angle text.

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. But here it will be different since the hip rafter doesn t lie at 45 degrees to the commons. Then the battens on the steeper pitch can be fixed in line with the first battens. If it is required to continue the tile courses in line around the hip line and the roof pitches at each face are unequal it will be necessary to set out the tile batten gauge on the lesser pitch first.

To get results you need to provide roof base dimensions length and width and roof pitch we assume it is identical for all sides. 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. If you get a chance to get a closer look you ll notice the lesser pitch rafters will be blocked up at the bearing point of the rafter to make up the difference in the two different rises. The following example will make clear the method of attack where it is desired to develop a constant for hip or valley in terms of the common rafter of one of the pitches.

Its a bastard irregular roof roof pitch is different from front rear and side front and rear could be a 7p. We ll use the 12 as the rotation point on the framing square and move the other end of the framing square to the edge of the hip rafter material using the 6 rotation dimension. The pitch of the unequal hip rafter can be expressed in relation to either the main roof or the secondary roof. Hips with unequal roof pitches.

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.