Patio roof cover sheds water allows natural light.
Shed roof span tables.
For instance 2 grade 2x4s at 16 on center will span just over 9.
For lesser grades spans should be shorter.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
Joist and rafter span tables.
There is no standard spacing it depends on what size of rafters you want to use and the span of your shed.
The tables below give maximum spans for rafters and beams.
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.
Keep in mind that these are maximums in other words shortening spans slightly will result in a more solid structure.
The figures are based on quality materials.
Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
View joist rafter tables.