Beam Span Awning 4x4

The selection is based primarily on the local load requirements in combination with the span and number of posts.

Beam span awning 4x4. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts. 2 grade there is a method that can be used for estimating beam spans for a. If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts.

The longer the joist the more area of deck the joist supports and thus the beam supports. The smallest beams for patio covers are typically 4 by 6. A 4 by 10 can usually span up to 12 feet between posts. Maximum rafter spans for a patio roof.

Obviously the larger the beam the greater the distance it can span between posts. Patio cover kits will include one of 7 different beam types. For pressure preservative treated southern pine no. 3x3 or 4x4 box beams are the most popular and used where possible.

Building codes for residential decks only require 40 psf. A redwood 4x6 beam should span no more than 6 between supporting posts. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Refer to the deck beam span table below to assist in determining the maximum span of a given beam between posts.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.