Patio Roof Beam Span Calculator

Patio roof maximum beam rafter spans.

Patio roof beam span calculator.

The species of lumber size of lumber and the load it carries. Use this calculator to find out the beam span and deck footing size for your project. According to our beam span chart resource the span of a beam is dependent on a few variables. Lumber species southern pine douglas fir douglas fir larch hemlock fir spruce pine fir redwood western cedar ponderosa pine red pine.

Span calculator for wood joists and rafters also available for the android os. If there is are any questions about anything else then you should contact your supplier or an engineer. If an example roof is 10 feet by 20 feet the total area is 200 square feet. Multiplied by 40 pounds per square foot equals 8 000 pounds.

This calculator matches up with 90 of the applications in the 2012 international residential code book. This post may contain affiliate links. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Patio beam span calculator posted on april 5 2020 by sandra please plete the items below and pergola beam span 18 professional deck builder forums build your patio cover or deck.

It has been my experience to never use a beam smaller than a two ply 2 x 8. This number represents the total load that your roof must carry. A 4 by 10 can usually span up to 12 feet between posts. Beam span calculator for help simply click on the beside the section you need help with watch this tutorial video.

Also available for the android os. Multiply the load per square foot by the total area of the roof. The smallest beams for patio covers are typically 4 by 6. An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts. For more information see our disclosures here.