Porch Roof Beam Span Calculator

This calculator matches up with 90 of the applications in the 2012 international residential code book.

Porch roof beam span calculator.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Window door garage door headers supporting roof wall floor loads. 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. Most interior beams need to include the roof load.

Build your patio cover or deck designing with roof rafter span tables board can span 16 ft for a wall pergola patio roof maximum beam rafter spanspatio roof beam calculatorpatio coversplease plete. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. If an example roof is 10 feet by 20 feet the total area is 200 square feet. According to our beam span chart resource the span of a beam is dependent on a few variables.

Diy pergola guide measuring pergola dimensions learn measuring pergola dimensions learn pergola beam span calculator span tables for 8 x12 x24 western red. Window door garage door headers supporting roof loads only. This number represents the total load that your roof must carry. Patio roof maximum beam rafter spans beamsmeasuring pergola dimensions learn the standardwhat is max distance between posts using 2x12x20 foot beams for apergola beam span calculator pergolacanopyideas pergolayou measuring pergola.

Multiplied by 40 pounds per square foot equals 8 000 pounds. Maximum rafter spans for a patio roof in areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. It has been my experience to never use a beam smaller than a two ply 2 x 8. Dimensional lumber deck beam span chart.

The numbers in gray indicate the distance between the support posts. Multiply the load per square foot by the total area 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. If there is are any questions about anything else then you should contact your supplier or an engineer.

Lumber species southern pine douglas fir douglas fir larch hemlock fir spruce pine fir redwood western cedar ponderosa pine red pine. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. The species of lumber size of lumber and the load it carries. A 2 2x10 can span 10 feet and so on.