Porch Roof Beam Span Chart

A 4 by 10 can usually span up to 12 feet between posts.

Porch roof beam span chart.

Window door garage door headers supporting roof wall floor loads. 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. 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.

If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts. 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 the initial calculation f can be estimated at 1 000. The smallest beams for patio covers are typically 4 by 6.

Patio roof maximum beam rafter spans. L stands for the span of the beam in feet. For more information see our disclosures here. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.

F stands for the beam s fiber strength in bending which depends on the species of wood. The total load is 4 000 pounds. This post may contain affiliate links. Fill in the parts of the formula that are already known.