Wood Roof Decking Spans

All end joints occur in line on every other support figure 6.

Wood roof decking spans.

Deck beam span table deck joist span table deck joist rule of thumb deck porch construction structural fasteners deck porch post beam connectors. Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Plywood is layers of wood.

Steel post cap connectors plywood post to beam cleats other connectors deck porch railings code requirements safety deck framing tables codes specifications questions answers about allowable spans for deck floor or porch framing. Standard structural decking patterns are 2 nominal tongued and grooved t g and 3 and 4 double t g products available with vee or eased edges to meet discriminating architectural requirements. For combination simple span and two span continuous multiply by 1 31 for two span continuous multiply by 1 85 loads shown are for dry use conditions multiply by 9 for wet service factor conversion factor to determine the board footage of decking required multiply the square footage of the roof area to be covered by a factor of 2 40. 4 tongue and groove roof decking.

This arrangement is applicable to 4 or more supports 3 or more spans. Plywood used for roof decking is typically called sheathing and carries a grade stamp indicating its load and span ratings and other performance factors.