Overview although uncommon there are situations where architectural parameters require off angle hip and valley roof construction.
Hip roof for irregular building.
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Major side roof span building width ridge thickness 2.
Each of the four sides of the roof slope downward there are no upright or vertical parts no gables etc on a hip roof.
Easy rafters does not calculate a complete four sided hip roof but rather calculates the common hip and jack rafters for one end of a hip roof.
The roof extension length must be at least twice as long as its width or the 2 hips will meet before they reach the existing building wall.
A hip and valley roof may be part of an irregular structure.
View the irregular hip roof valley rafter framing blog for how to layout the hip rafter backing depth mark and the hip rafter side cut mark for hip rafter side cut angles.
2007 jlc on complex roof geometry.
A regular hip has equal slopes on all sides while an irregular hip has different slopes on the main roof and hip end roof.
To maintain a consistant ridge height in these situations the roof pitch must be adjusted.
A hip roof design refers to a roof where the roof sides slope downwards from a middle peak with the rafter ends meeting the exterior walls of the house.
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Major side roof pitch major.
Major side plan angle.
A hip roof is a rectangular roof that slopes on all four sides.
Minor side roof pitch minor.
The most common parameter is to maintain an equal ridge height over building sections with differing spans.
View the hip rafter roof plane alignment blog for more examples of the hip rafter plumb mark line shift on equal pitched roofs.
This type of roof is also called broken back hip and valley roof because the main hips are intconeected by the rafter of gables on one side and the rafter of the valley on the other.
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.
Irregular hip geometry framing dxf auto generated dxf cad file of irregular hip geometry drawing each time script is run.
Here we consider two types of hipped roofs see picture.
1 pyramid hip roof roof base is a square roof sides are identical isosceles triangles 2 hip roof roof base is a rectangle two sides are identical isosceles triangles and two sides are identical trapeziums.
