Roof Truss Ridge Blocking

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.

Roof truss ridge blocking.

Each block is 2x4 or 2x6 depending on the size of the rafters and is secured to the top plate. Sounds as if you live in either a high wind area or a seismic zone and the roof is your shear diaphragm. Some may call these wood members blocking and deem them as optional. 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.

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. A continuous band rim or header joist or roof truss parallel to the braced wall panels shall be permitted to replace the blocking required by this section. Inspector want ridge blocking on truss roof. For trusses with heel heights less than 15 this blocking can be made of solid sawn dimensional lumber as shown in figure 1a.

Blocking or boundary member. A complex roof with more than four hips and with valleys due to wall jogs means that there are usually cases where trusses don t conveniently come to a hip and ridge line junction. Required perimeter blocking on the sheathing attached to each side. 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.