Porch Roof Header Span Table

Anything 5 and above we always at least double cripple.

Porch roof header span table.

Includes span tables for all load bearing locations and the number of jack studs. 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. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. These charts are for 30 pound per square foot snow load on the roof.

A 2 2x10 can span 10 feet and so on. The total load is 4 000 pounds. Window door garage door headers supporting roof loads only. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size.

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Beams of more than one ply must be fastened together with either nails or bolts. The tables below give maximum spans for rafters and beams. In the example the beam spans the 10 foot width of the roof.

Tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications. Window door garage door headers supporting roof wall floor loads. Span charts and 2012 irc building codes for girders and headers. Dimensional lumber deck beam span chart.

A double 2x12 beam can span 12 feet. On longer spans the beam may require much more bearing space as indicated by this table. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. The figures are based on quality materials.

View joist rafter tables. 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. The numbers in gray indicate the distance between the support posts. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.