Wood Beam Safe Load Tables

The span of a beam is dependent on a few variables.

Wood beam safe load tables.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. These columns are subject to axial compressive loads and in some cases eccentric loads. Size selection tables headers beams. Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders.

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. Beam span maximums are based on a maximum anticipated live load. Imposed loads of 0 75 kn m for maintenance and snow load are applicable where there is no permanent access no fixed ladder or staircase and most areas where the altitude does not exceed 100 metres refer to bs 6399 3. 270 pages 9 7 mb pdf august 2009 generic load tables for wood beams and wood columns and generic span tables for high capacity floor joists and for plank and laminated floors and roofs.

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. These easy to use tables were compiled by the southern forest products association sfpa as a service to design build professionals and other. Allowable load tables 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.

Headers beams. These tables are provided as a guideline. Design load tables for wood columns posts 4x4 through 12x12 incised 4x4 and 4x6 in a wood structure whether it is a deck or a five story wood frame building solid wood columns posts are often used. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Imposed loads of 1 kn m for maintenance and snow load are applicable where there is no permanent access no fixed ladder or staircase and most areas where the altitude. The species of lumber size of lumber and the load it carries. The tables permit a bearing length of up to 3 5 inches but since 1 5 is probably the worst case that you ll encounter for joist or rafter bearing it s a safe value. Table specifications are provided with each table indicating conditions and assumptions used to calculate the loads.