Metal Patio Roof Beam Span Table

The tables below give maximum spans for rafters and beams.

Metal patio roof beam span table.

A 4 by 10 can usually span up to 12 feet between posts. If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts. F stands for the beam s fiber strength in bending which depends on the species of wood. Attached flat roof 1ao page14.

For the initial calculation f can be estimated at 1 000. In the example the beam spans the 10 foot width of the roof. The smallest beams for patio covers are typically 4 by 6. The total load is 4 000 pounds.

Patio roof beam calculator roof beam span calculator jackdecor co timber trusses beams patio covers and decks santa clarita christopher french beam span table douglas fir elijahhome co patio roof. Maximum patio height hc is 3 2m. For heights outside these ranges contact stramit for further information. Colorbeam light structural steel beams provide an ideal roof framing system for all outdoor home improvement projects such as patios carports verandahs and awnings.

L stands for the span of the beam in feet. The overlapping sections of the beam provide extra rigidity allowing longer spans between supports. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. R cb150 16 beam span table used w 3600 width of frame rafter span χ 6410 fascia beam span the cb150 16 beam achieves the 6000mm span for the fascia beam and can be used for the rafters.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. 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. Average roof height between 3m and 6 5m 3m h 6 5m. Fill in the parts of the formula that are already known.

In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts. The figures are based on quality materials. Span tables are based on patio height and average roof heights as specified in the empty under and blocked under selection tables.