Size selection tables headers beams.
Wood beam safe load tables.
These tables are provided as a guideline.
Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders.
Table specifications are provided with each table indicating conditions and assumptions used to calculate the loads.
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 columns are subject to axial compressive loads and in some cases eccentric loads.
Beam span maximums are based on a maximum anticipated live load.
These easy to use tables were compiled by the southern forest products association sfpa as a service to design build professionals and other.
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 span of a beam is dependent on a few variables.
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.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
Table 9 1 in span tables for joists and rafters figure 5 gives a required compression value of 237 psi for a span of 16 feet and bearing length of 1 5 inches.
Aitc beam capacity 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.
Headers beams.
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.
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.
Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
View size selection tables.
View allowable load tables.