Maximum patio height hc is 3 2m.
Patio cover patio roof beam span table.
In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.
Average roof height between 3m and 6 5m 3m h 6 5m.
If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts.
Jan 15 2017 a simple buying guide for beams and rafters that support patio roofs.
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Includes size and spacing tables for load bearing and links to related articles.
For heights outside these ranges contact stramit for further information.
The smallest beams for patio covers are typically 4 by 6.
Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.
A 4 by 10 can usually span up to 12 feet between posts.
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Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run.
For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.
The tables below give maximum spans for rafters and beams.
Span tables for 8 x12 x24 western red cedar this pergola.