Rafter Ties On Hip Roof

Rafter stresses in hip roof construction sacrebleu structural 13 may 05 20 01 further we call the roof trusses as 2x4 trusses and the floor trusses as 4x2 trusses referring to the orientation and usual size of the top and bottom chords.

Rafter ties on hip roof.

One way to avoid rafter ties is to use a post at each end of the ridge beam but that clutters up the internal space and may not be an acceptable solution. A hipped roof can be designed without rafter ties or internal columns by using the wall plates as tension members and the roof deck for stability. The roof framing mock up below shows a standard rafter tie. A rafter tie is a tension tie in the lower third of opposing gable rafters that is intended to resist the outward thrust of the rafter under a load.

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. In many situations you ll find that ceiling joists installed parallel to the rafters are intended to function as rafter ties. 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. Hip ridge connector the hrc is a one piece connector for supporting hip members from the ridge beam or rafters.

My engineer spec d a 2x12 top plate yes on the flat on the perimeter walls steel strapped at the corners. This article excerpts from provides copies of roof framing suggestions from canadian building codes and the cmhc wood frame house construction guide. The thrust to worry about is at the tails of the common rafters. Code required in some southern tornado prone states.

It is site adjustable for slopes up to 45 to cater for the hip pitch for both left and right rafters. Some of these can support the roof and prevent ridge sagging and wall spreading. Collar ties are used in the upper third of the roof frame about ever four feet to resist upward hinging in a violent wind that can take the ridge apart other wise. Roof framing suggestions canadian guidelines.

Rafter to hip or rafter to valley connections the lssj field adjustable jack hanger is the ideal hanger for connecting jack rafters to hip or valley members. Framing any roof but particularly a gable roof low slope roof and cathedral ceilign roofs requires collar ties rafter ties and possibly a structural ridge beam to support the roof and to. The lssj is designed with a versatile hinged seat allowing for easy field adjustment to typical rafter slopes from 0 12 of 12 12. Collar ties rafter ties tension beams structural ridge beams.

If you build a square hip roof you can do it without ceiling joists.