Porch Roof Header Span Table

Anything 5 and above we always at least double cripple.

Porch roof header span table.

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. For a porch roof the beam needs to be. Jan 15 2017 a simple buying guide for beams and rafters that support patio roofs. Window door garage door headers supporting roof wall floor loads.

In the example the beam spans the 10 foot width of the roof. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Window door garage door headers supporting roof loads only.

The house is timberframe and the perimeter beam header is rough sawn full dimension 6x14 dense doug fir. Calculating loads on headers and beams. View joist rafter tables. F stands for the beam s fiber strength in bending which depends on the species of wood.

For the initial calculation f can be estimated at 1 000. The total load is 4 000 pounds. 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.

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. I have a corner porch with 16 foot spans and a hip roof. Includes size and spacing tables for load bearing and links to related articles. 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. The tables below give maximum spans for rafters and beams.