Attic Wind Braces

Product data sheet sheet no 5 may 2007 fig 1 the elements of bracing room in the roof trussed rafters.

Attic wind braces.

Wind or wall bracing this bracing is installed in the roof in addition to the truss stability bracing and its purpose is to stabilise the gable walls under the action of wind loading. Learn the science and math of roof framing. Submitted by ray thornburg on tue 06 04 2013 20 10. Bracing purlin braces or any other roof braces ridge braces hip rafter bracing along with valley bracing must not be supported off the ceiling joists.

Click the links to go to my buy it now page. There should be a minimum of four diagonal rafter braces in each roof. In the attic there are two 2x4 angle braces one at each gable end that connect from the ceiling joist gable end to the ridge board mid span. How to brace rafters in an attic.

My book the roof framers field manual tells all. It braces a roof laterally and diagonally. In medieval roofs they are arched and run from the principal rafters to catch the purlins. Applicable to all trussed rafter roofs unless rigid sarking such as timber boarding or plywood is used.

Bracing must be installed off of walls or beams. If wind bracing is only temporary support whilst a truss roof is being put up then tell me what stops the roof blowing. Homeowners cannot take chances with the structural integrity of their roofs. There is more discussion on attic bracing on our truss bracing page and our wind zone requirement page.

Decorative arched wind braces between purlins 15th 16th century in architecture wind braces are diagonal braces to tie the rafters of a roof together and prevent racking. The roof is subject to pressure placed on it by natural forces including snow rain. One way to strengthen a gable roof is to brace the end walls which are the most vulnerable to uplift. Larger joist framing materials for instance 2x10 or 2x12 s can be doubled or tripled up with plywood in between and glued to create a flush.

Hip roofs in which all four sides slope toward a central ridgeline are naturally more wind resistant than gable roofs.