Fine Homebuilding Irregular Hip Roof

We are the professionals for the future of the craft of carpentry.

Fine homebuilding irregular hip roof. 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. A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration. But unlike many of the hip roof bays that get built locally we frame ours with two irregular hips. 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.

Irregular hip geometry framing dxf auto generated dxf cad file of irregular hip geometry drawing each time script is run. Without it the plane of the roof has to be warped to intersect the valley. More often than not i run across roof plans that leave out a second irregular hip. 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.

Irregular hips geometry based on billy dillon s article in the sept. Select the following information by using the drop downs to enter values in feet and inches. A regular hip has equal slopes on all sides while an irregular hip has different slopes on the main roof and hip end roof. 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.

A hip and valley roof may be part of an irregular structure. Explore framing complexities that result when roofs of two different pitches intersect. Rick arnold frequent contributor to fine homebuilding and the journal of light construction presenter at jlc live the katz roadshow the remodeling show. Dedicated to the art of carpentery roof framing.

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. Learn more about off angle roof framing. 2007 jlc on complex roof geometry. Such buildings may have more than four hips in the roofs and they form valleys at the inside corners.