The smallest beams for patio covers are typically 4 by 6.
Pergola patio roof beam span table.
Colorbeam light structural steel beams provide an ideal roof framing system for all outdoor home improvement projects such as patios carports verandahs and awnings.
Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
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.
Table 2l pergola or carport beams wind classifications n1 n2 n3 and c1 member size roof load width 1500 3000 4500 6000 1500 3000 4500 6000 maximum beam span mm single span continuous span unseasoned cypress f5 100 x 50.
Monoslope empty under average roof height h patio height hc 3 h 4 4 h 5 5 h 6 5 hc 2 3 d a a 2 4 hc 2 8 f c a 2 8 hc 3 2 g e b monoslope blocked under.
For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.
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.
For free standing canopies of any height up to 3 2m use the span table marked below with an asterisk.
Includes size and spacing tables for load bearing and links to related articles.
If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts.
Roof pitch use recommended minimum roof pitches as specified by roof sheet supplier.
In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.
Choose the appropriate span table.
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Jan 15 2017 a simple buying guide for beams and rafters that support patio roofs.
Tables 2l and 2h list the sizes and spans for pergola or carport beams in low wind speed and higher wind speed areas.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
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The overlapping sections of the beam provide extra rigidity allowing longer spans between supports.