Porch Roof Header Span Table

It is pressure treated as well.

Porch roof header span table.

View joist rafter tables. In the example the beam spans the 10 foot width of the roof. The tables below give maximum spans for rafters and beams. F stands for the beam s fiber strength in bending which depends on the species of wood.

Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Anything 5 and above we always at least double cripple. Includes size and spacing tables for load bearing and links to related articles.

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. The house is timberframe and the perimeter beam header is rough sawn full dimension 6x14 dense doug fir. Jan 15 2017 a simple buying guide for beams and rafters that support patio roofs.

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. For the initial calculation f can be estimated at 1 000. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. According to the 2012 irc codes any beam joist or header shall never have a bearing of less than 1 1 2.

The figures are based on quality materials. Calculating loads on headers and beams. Window door garage door headers supporting roof wall floor loads. Window door garage door headers supporting roof loads only.

I have a corner porch with 16 foot spans and a hip roof. For a porch roof the beam needs to be.