![]() The side cut is the angle given in the table, the plumb cut is the same angle as in the table for the hip or valley rafter. Each jack rafter has the same side cut and plumb cut on the hip or valley rafter and the same angle as the common rafter at the ridge or fascia. ![]() The valley jack goes from a valley rafter to the roof ridge. The hip jack is a short rafter that spans from the wall plate to a hip rafter. The Valley roof option is used to calculate valleys for 90 degree intersecting roofs with equal slopes and wall plates at the same height. There are two types of jack rafters: the hip jack and the valley jack. Rafter (second left) pictured with his parents Jim and Jocelyn and eight siblings.(Supplied)Home sweet home. The compound angle for the hip or valley rafter is the plumb cut, given in the table, and the degree on each side of this cut, on both ends, as In the table. If the common rafter has a slope of 5" in 12", the hip or valley rafter has a slope of 5" in 17". The angle or plumb cut for a hip or valley rafter, given in our table, is taken from the rafter square based on the slope of the roof and diagonal. Both the hip and valley rafters form a 45 degree angle, compounded with the slope of the roof. The valley rafter is the structural board which forms the valley at an inside corner of the roof. The hip rafter is the structural board which forms the hip at an outside corner of the roof and is installed between 2 common rafters at the ridge. The plumb cut on a common rafter is at the ridge, the bird's mouth on the wall and at the fascia. Second Method: This method of determining length of a hip or valley rafter is not unlike the second method described for the common rafter. The angle given for a common rafter is called the plumb cut, since the ends are vertical or plumb. Measurements for lengths of hip or valley are to be made along the top edge of the stock beginning at the line for side cut and midway between the point and heel, Fig. Plan for Valley Rafter Connecting Two Roofs of Unequal Pitch and Width. The common rafter is one of a series of lineal structures extending from the fascia of the overhang to the top of an exterior wall to the ridge board of a roof. (See figure 15) See figures 13 and 15 for center common rafter at the end of the ridge. The angles shown are to be used with the popular compound miter or cutoff saws. ![]() I've revised it a bit to include angles of the side cuts for hip and valley and the jack rafters.įor info on how to use these tables see Rafter Tables on the Framing Square. Rafter tables are commonly imprinted on the steel square (carpenter square, rafter square, framing square).
0 Comments
Leave a Reply. |