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.

3x3 or 4x4 box beams are the most popular and used where possible. 2 grade there is a method that can be used for estimating beam spans for a. For pressure preservative treated southern pine no. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Refer to the deck beam span table below to assist in determining the maximum span of a given beam between posts. Maximum rafter spans for a patio roof. For heavy roofs or in. Building codes for residential decks only require 40 psf.

Beam span maximums are based on a maximum anticipated live load. A redwood 4x6 beam should span no more than 6 between supporting posts. 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.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts. If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts. 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.