Beam Span Awning 4x4

Maximum rafter spans for a patio roof.

Beam span awning 4x4.

Patio cover kits will include one of 7 different beam types. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. 3x3 or 4x4 box beams are the most popular and used where possible. An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry.

2 grade there is a method that can be used for estimating beam spans for a. The selection is based primarily on the local load requirements in combination with the span and number of posts. For heavy roofs or in. The smallest beams for patio covers are typically 4 by 6.

Refer to the deck beam span table below to assist in determining the maximum span of a given beam between posts. If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts. A redwood 4x6 beam should span no more than 6 between supporting posts. The longer the joist the more area of deck the joist supports and thus the beam supports.

In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. Beam span maximums are based on a maximum anticipated live load. For pressure preservative treated southern pine no. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.

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