Jack Rafters Hip Roof

All the complicated trigonometry calculations are done for you and there s loads more in there too like diminishing jack measurements and hip rafter lengths and angles as well.

Jack rafters hip roof.

One of the shorter rafters used in a hip or valley roof b. A hip roof is a rectangular roof that slopes on all four sides. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. 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.

It is also necessary to select the pitch of the complimentary roof. When you create a hip roof in a timber frame there are different types of rafters used. A jack rafteris a shortened com mon rafter that may be framed to a hip rafter a valley rafter or both. 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.

This is the adjacent roof that will share the hip or valley. Thus there arehip jack raftersand valley jack rafters. Most of the times it is the same as the pitch the jack rafter is on. A regular hip has equal slopes on all sides while an irregular hip has different slopes on the main roof and hip end roof.

The 7 12 pitch hip roof is framed with 2x6 common and jack rafters on 16 inch centers and with 2x8 hips and ridge. Jack rafter noun a. I use it with an adjustable stanley quick square and can cut the whole roof on the ground take all the timbers up and assemble the lot in one go. 7 greenleas hove east sussex bn3 8ad.

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. One of the pieces simulating extended rafters under the eaves in some styles of building. 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. 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 hip rafters in purple form the roofline and extend from the plate to the ridge.