Hip Roof Jack Rafters

The 7 12 pitch hip roof is framed with 2x6 common and jack rafters on 16 inch centers and with 2x8 hips and ridge.

Hip roof jack rafters. 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. The first step is to enter the length of the longest jack rafter. A jack rafter is a shortened com mon rafter that may be framed to a hip rafter a valley rafter or both. Dab digital smart ear defender.

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. 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. When you create a hip roof in a timber frame there are different types of rafters used.

Span for the main rafters measure from outside of wall to outside of wall. Https amzn to 3adarko hikoki circular saw kit. Https amzn to 3239rvw adjustable quick square. Use the hip roof calculator for an easier way to get started.

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. The total rise of hip and valley rafters is. 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. Thus there are hip jack rafters and valley jack rafters.

They must must be on the same level. Know that the basic skeleton for the roof has to be erected before any jack rafters can be installed. The hip rafters in purple form the roofline and extend from the plate to the ridge.