Wood Roof Decking Spans

All pieces are supported on three supports.

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. 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. Plywood used for roof decking is typically called sheathing and carries a grade stamp indicating its load and span ratings and other performance factors. Structural decking also known as roof decking should not be confused with lumber intended for residential and non residential outdoor decks.

All end joints occur in line on every other support figure 6. Plywood is layers of wood. 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. 4 tongue and groove roof decking.

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. With less than 4 supports a special.