Shed Roof Span Tables

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.

Shed roof span tables.

For lesser grades spans should be shorter. Patio roof cover sheds water allows natural light. Joist and rafter span tables. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. For standard shed roof rafter spacing see rafter span chart. Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. For instance 2 grade 2x4s at 16 on center will span just over 9.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Keep in mind that these are maximums in other words shortening spans slightly will result in a more solid structure. R cb150 16 beam span table used w 3600 width of frame rafter span χ 6410 fascia beam span the cb150 16 beam achieves the 6000mm span for the fascia beam and can be used for the rafters. View joist rafter tables.

The tables below give maximum spans for rafters and beams.