Wood Beam Load Tables

Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.

Wood beam load tables.

Table specifications are provided with each table indicating conditions and assumptions used to calculate the loads. These tables are provided as a guideline. View size selection tables. Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders.

Window door garage door headers supporting roof loads only window door garage door headers supporting roof wall floor loads. Anything 5 and above we always at least double cripple. The span of a beam is dependent on a few variables. 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.

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. View allowable load tables. Joist and rafter span tables. According to the 2012 irc codes any beam joist or header shall never have a bearing of less than 1 1 2.

Beam span maximums are based on a maximum anticipated live load. The species of lumber size of lumber and the load it carries. Beams of more than one ply must be fastened together with either nails or bolts. 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.