Hip Roof Jack Rafters

Select the following information by using the drop downs to enter values in feet and inches.

Hip roof jack rafters. The hip rafters in purple form the roofline and extend from the plate to the ridge. Measure the distance between the angled hip rafter and the top of the wall at 20 in 51 cm increments and cut jack rafters to fit. The jack rafters in turquoise connect from the plate in red to the hip rafter and are of different lengths depending on where on the slope they are placed. The total rise of hip and valley rafters is.

They must must be on the same level. Dab digital smart ear defender. The first step is to enter the length of the longest jack rafter. Thus there are hip jack rafters and valley jack rafters.

Https amzn to 3239rvw adjustable quick square. At the birdsmouth i supplied the 3 inch seat and for the rafter tail a 12 inch overhang with a 2 inch high subfascia plumb cut which dictated the level cut at the heel. If more are needed then simply start over by entering the last measurement in the longest jack rafter field. 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.

Https amzn to 3adarko hikoki circular saw kit. Use the hip roof calculator for an easier way to get started. The 7 12 pitch hip roof is framed with 2x6 common and jack rafters on 16 inch centers and with 2x8 hips and ridge. Span for the main rafters measure from outside of wall to outside of wall.

A jack rafter is a shortened com mon rafter that may be framed to a hip rafter a valley rafter or both. 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. Depending on the size of the roof most hip roofs will have 4 6 short jack rafters that are spaced out every 20 inches 51 cm between the hip rafters and the king common rafters.