What blocking is required at the ridge line of a roof in Rhode Island?
Can’t find written guidelines anywhere. Local BI says blocking must be installed the entire length of the roof’s ridgeline if T& G plywood is used. I would like to know the reference section in code book. Any help.
Replies
From Appendix AA, High Wind
Bold and font colors added by me for emphasis. Note the exemption.
AA 202.3 Roof nailing.
Roof attachment shall be accomplished with minimum 8d nails as follows:
1. In the 4 foot perimeter edge zone along the edges: 6” o/c
2. To the intermediate supports within th
e 4 foot perimeter edge zone: 6” o/c
3. Along the gable end wall or rake: 4” o/c
4. All other areas: 6” o/c edge; 12” o/c intermediate.
All sheathing edges w
ithin the 4-foot perimeter edge
zone shall be blocked with 2x3
minimum including the ridge line and soffit/fascia
area. Provisions for ventilation air shall
be maintained.
Exception:
2 x 3 intermediate blocking can be elimin
ated provided all sheathing is 5/8”
nominal tongue and groove structural panels.