Roof Deck Span Table

A double 2x12 beam can span 12 feet.

Roof deck span table.

When supporting joists that span 12 feet with no overhang beyond the beam a double ply beam can span in feet a value equal to its depth in inches. View joist rafter tables. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Thickness shown in the steel deck institute sdi design manual.

The 3 inch deep ribs make n deck ideal for longer span conditions where b deck falls short. Refer to the deck beam span table below to assist in determining the maximum span of a given beam between posts. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. A redwood 4x6 beam should span no more than 6 between supporting posts. Loads shown in the shaded areas are governed by the live load deflection. The figures are based on quality materials.

The profile contains 4 ribs and is 32 inches wide with male and female edges creating an interlocking side lap when installed. Home building a deck deck beam. Two inch decking not less than 40 to be 14 ft. Minimum length is limited to 75 of the span length i e for 8 ft.

The tables below give maximum spans for rafters and beams. Joist and rafter span tables. Type n profiles are 3 inch deep structural roof deck that provide both vertical load and diaphragm shear capacity. A dead load of 10 psf has been included.

A 2 2x10 can span 10 feet and so on. Support spacing 6 ft three inch decking not less than 40 to be 14 ft. Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Steel joists and steel deck load tables can facilitate the design of your next project featuring new millennium structural steel buildings systems.

Not in excess of l 240 of the span. And longer not more than 10 to be less than 10 ft. Dimensional lumber deck beam span chart the numbers in gray indicate the distance between the support posts. Obviously the larger the beam the greater the distance it can span between posts.