Porch Roof Header Span Table

It is pressure treated as well.

Porch roof header span table.

The total load is 4 000 pounds. The tables below give maximum spans for rafters and beams. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Anything 5 and above we always at least double cripple.

Window door garage door headers supporting roof loads only. For the initial calculation f can be estimated at 1 000. Jan 15 2017 a simple buying guide for beams and rafters that support patio roofs. On longer spans the beam may require much more bearing space as indicated by this table.

Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. Window door garage door headers supporting roof wall floor loads. View joist rafter tables. Calculating loads on headers and beams.

In the example the beam spans the 10 foot width of the roof. The house is timberframe and the perimeter beam header is rough sawn full dimension 6x14 dense doug fir. F stands for the beam s fiber strength in bending which depends on the species of wood. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. For a porch roof the beam needs to be. The figures are based on quality materials. I have a corner porch with 16 foot spans and a hip roof.

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. According to the 2012 irc codes any beam joist or header shall never have a bearing of less than 1 1 2.