Wood Beam Load Tables

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

Wood beam load tables.

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. Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. View size selection tables. Beam span maximums are based on a maximum anticipated live load.

Joist and rafter span tables. Anything 5 and above we always at least double cripple. According to the 2012 irc codes any beam joist or header shall never have a bearing of less than 1 1 2. The span of a beam is dependent on a few variables.

Table specifications are provided with each table indicating conditions and assumptions used to calculate the loads. 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. Window door garage door headers supporting roof loads only window door garage door headers supporting roof wall floor loads. The species of lumber size of lumber and the load it carries.

View allowable load tables. These easy to use tables were compiled by the southern forest products association sfpa as a service to design build professionals and other. On longer spans the beam may require much more bearing space as indicated by this table. Beams of more than one ply must be fastened together with either nails or bolts.