Roof Truss Ridge Blocking

For trusses with heel heights less than 15 this blocking can be made of solid sawn dimensional lumber as shown in figure 1a.

Roof truss ridge blocking.

Inspector want ridge blocking on truss roof. Required perimeter blocking on the sheathing attached to each side. Some may call these wood members blocking and deem them as optional. In my experience traveling across the country observing wood framed construction it was apparent that east of the rocky mountains structural wood members in line with supporting walls between roof framing cease to be installed.

And often in a humid environment. The pics show a view of such a roof a plan view of trusses and blocking at and near the intersect and a 3d model of the three pieces of 2x blocking that fills in for the panel nailing. Sounds as if you live in either a high wind area or a seismic zone and the roof is your shear diaphragm. Where required by this section blocking between rafters or roof trusses shall be attached to top plates of braced wall panels and to rafters and roof trusses in accordance with table r602 3 1.

A new provision in the 2009 irc. Link is external and carried through to more recent versions is the use of blocking panels between roof trusses to connect the trusses to the braced wall panels below if the heel height is greater than 9. Rafter blocking is an essential part of the roof framing process in that the blocks provide a stop for ceiling insulation and a continuous surface for the roof sheathing to be edge nailed to. Each block is 2x4 or 2x6 depending on the size of the rafters and is secured to the top plate.