Fine Homebuilding Irregular Hip Roof

Such buildings may have more than four hips in the roofs and they form valleys at the inside corners. Learn more about off angle roof framing. Explore framing complexities that result when roofs of two different pitches intersect.

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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.

Fine homebuilding irregular hip roof. Without it the plane of the roof has to be warped to intersect the valley. But unlike many of the hip roof bays that get built locally we frame ours with two irregular hips. Irregular hips geometry based on billy dillon s article in the sept. A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration.

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. A hip roof commonly tops this kind of a bay. We are the professionals for the future of the craft of carpentry. Select the following information by using the drop downs to enter values in feet and inches.

If the hip is not backed this is the amount to lower the seatcut of the hip to have the corner edge of the hip plane in with the sheathing common rafter ll major side majll majspan majllratio. Dedicated to the art of carpentery roof framing. A hip and valley roof may be part of an irregular structure. More often than not i run across roof plans that leave out a second irregular hip.

A regular hip has equal slopes on all sides while an irregular hip has different slopes on the main roof and hip end roof. 2007 jlc on complex roof geometry. Next click on the hip angles button and then click on the hip valley rafter slope angle text. Rick arnold frequent contributor to fine homebuilding and the journal of light construction presenter at jlc live the katz roadshow the remodeling show.

It will display the framing square usage for the slope angle of the hip rafter 27 50055 6 12. Irregular hip geometry framing dxf auto generated dxf cad file of irregular hip geometry drawing each time script is run. 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. 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.