Porch Roof Header Span Table

On longer spans the beam may require much more bearing space as indicated by this table.

Porch roof header span table.

All other data is available on page 121 of the 2012 international residential code. 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. View joist rafter tables.

Anything 5 and above we always at least double cripple. 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. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. Roof ceiling and one clear span floor 4 2x12 9 11 2 8 7 2 7 8 2 fccip 425 main st ste 25 greenfield ma 01301 3393 fccip staff phone.

Span charts and 2012 irc building codes for girders and headers. These charts are for 30 pound per square foot snow load on the roof. According to the 2012 irc codes any beam joist or header shall never have a bearing of less than 1 1 2. Girder spans and header spans for exterior bearing walls maximum spans for douglas fir larch hem fir southern pine and spruce pine fir and required number of jack studs.

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Beams of more than one ply must be fastened together with either nails or bolts. 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.

Window door garage door headers supporting roof wall floor loads. In the example the beam spans the 10 foot width of the roof. Window door garage door headers supporting roof loads only. The total load is 4 000 pounds.

The figures are based on quality materials.