Major side roof span building width ridge thickness 2.
Hip roof for irregular building.
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.
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.
If the extension length is half the extension length the 2 hips will meet at the existing wall and the roof will come to a peak with no ridge like half a pyramid.
To maintain a consistant ridge height in these situations the roof pitch must be adjusted.
A hip and valley roof may be part of an irregular structure.
2007 jlc on complex roof geometry.
Major side plan angle.
Such buildings may have more than four hips in the roofs and they form valleys at the inside corners.
The most common parameter is to maintain an equal ridge height over building sections with differing spans.
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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.
Minor side roof pitch minor.
A regular hip has equal slopes on all sides while an irregular hip has different slopes on the main roof and hip end roof.
Major side roof pitch major.
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.
Here we consider two types of hipped roofs see picture.
Irregular hips geometry based on billy dillon s article in the sept.
Overview although uncommon there are situations where architectural parameters require off angle hip and valley roof construction.
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.
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.
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.
Select the following information by using the drop downs to enter values in feet and inches.
Irregular hip geometry framing dxf auto generated dxf cad file of irregular hip geometry drawing each time script is run.
