Wood Beam Load Tables

Beams of more than one ply must be fastened together with either nails or bolts.

Wood beam load tables.

Fewer posts on upper level decks are typically more desirable to the occupants and this drives the use of larger framing materials for longer spans. According to the 2012 irc codes any beam joist or header shall never have a bearing of less than 1 1 2. Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Aitc beam capacity tables aitc capacity tables provide the uniformly distributed load that a glued laminated timber beam can support based on beam size span and material properties.

View allowable load tables. The species of lumber size of lumber and the load it carries. Tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications. These tables are provided as a guideline.

View size selection tables. These easy to use tables were compiled by the southern forest products association sfpa as a service to design build professionals and other. Joist and rafter span tables. Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders.

On longer spans the beam may require much more bearing space as indicated by this table. Beam span maximums are based on a maximum anticipated live load. Table specifications are provided with each table indicating conditions and assumptions used to calculate the loads. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.