Hip And Valley Roof Framing

Roof framing geometry kernel rafter lengths roof ratio multiplier.

Hip and valley roof framing.

Side and bevel cuts on the hip valley rafter tail with square hung fascia. The hip and valley factor varies according to the slope of the roof as shown in the table below. Such buildings may have more than four hips in the roofs and they form valleys at the inside corners. 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.

Like the hip rafter it extends diago nally from the top plate to the ridge. A hip 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. 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. A valley rafterforms a depression in the roof instead of a hip.

Divide the rafter length by 12 of run to calculate the roof ratio multiplier. And regular california valley sleeper head tail cuts. Stick framing roofs also includes the eight mainstay charts found in a roof cutter s secrets including. Now draw the centerlines for all rectangles that are formed inside.

Here roofs are constructed with an angle of 90 degrees. First of all you need to design the layout of building. Similarly hip and valley rafters provide the point of connection for roof rafters framed at angles. Now outline the biggest rectangle inside the building layout.

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. The common rafter length can be calculated by the roof ratio length per 12 of run. Everything you need for standard roof framing situations. A hip and valley roof may be part of an irregular structure.

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. Hip rafter ratio length multiplier hrrlm 18 12 1 5 common rafter length multiplier crlm 13 4164 12 1 11803. Hip roof framing hip to common to ridge join diagram ply sheathing angle and cut set back both sheet orientations sheathing hip cut calculator hip roof ply cut angle diagram 1138 93 ft 35 6 sheets 5 10 15 waste 40 sheets. 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. Rr and ll ratios.