Hip Valley Roof Framing

A hip and valley roof may be part of an irregular structure.

Hip valley roof framing.

Divide the rise by the run the run is 12. Similarly hip and valley rafters provide the point of connection for roof rafters framed at angles. Attach 4 6 centering rafters and lift the ridge beam into place. For any roof slope expressed as x in 12 rise in run the hip and valley factor is determined by finding the square root of rise run 2.

The total rise of hip and valley rafters is. Hip rafter ratio length multiplier hrrlm 18 12 1 5 common rafter length multiplier crlm 13 4164 12 1 11803. 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. Roof framing geometry kernel rafter lengths roof ratio multiplier.

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. And regular california valley sleeper head tail cuts. Rafter is called for only when framing a hip roof but a valley rafter is needed on both hip and gable roofs whenever roof planes intersect. The common rafter length can be calculated by the roof ratio length per 12 of run.

Http amzn to 2sfscbz swanson speed square http amzn to 2svgnvt 16 x 24 framing square starrett http amzn to 2sflm5v milwaukee circular saw http amzn. However since there is some load transfer with these members the code requires a nominal 2 thickness and bracing to a load bearing partition at the upper end or to be designed as a beam with proper supports. A jack rafter is a shortened com mon rafter that may be framed to a hip rafter a valley rafter or both. First of all you need to design the layout of building.

Now outline the biggest rectangle inside the building layout. Here roofs are constructed with an angle of 90 degrees. Rr and ll ratios. The hip and valley factor varies according to the slope of the roof as shown in the table below.

Divide the rafter length by 12 of run to calculate the roof ratio multiplier. 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. Such buildings may have more than four hips in the roofs and they form valleys at the inside corners. Stick framing roofs also includes the eight mainstay charts found in a roof cutter s secrets including.

Thus there are hip jack rafters and valley jack rafters. The first step in the process of erecting the hip roof is to get the ridge beam into place at the top of the roof. Hip and valley roof framing is no so complex as compared to hip roof framing procedures. Place the 4 6 common rafters in their designated positions along the 2 longest walls and nail them firmly to the wall with a nail gun.