Jack Rafters Hip Roof

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.

Jack rafters hip roof.

Jack rafter noun a. 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. A jack rafteris a shortened com mon rafter that may be framed to a hip rafter a valley rafter or both. It is also necessary to select the pitch of the complimentary roof.

Next select a the pitch the jack rafter is on. This is the adjacent roof that will share the hip or valley. Easy rafters does not calculate a complete four sided hip roof but rather calculates the common hip and jack rafters for one end of a hip roof. One of the shorter rafters used in a hip or valley roof b.

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. 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. Most of the times it is the same as the pitch the jack rafter is on. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube.

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 7 12 pitch hip roof is framed with 2x6 common and jack rafters on 16 inch centers and with 2x8 hips and ridge. 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. The hip rafters in purple form the roofline and extend from the plate to the ridge.

When you create a hip roof in a timber frame there are different types of rafters used. One of the pieces simulating extended rafters under the eaves in some styles of building. A hip roof is a rectangular roof that slopes on all four sides. A secondary roof timber as a common rafter resting on purlins.

Thus there arehip jack raftersand valley jack rafters.