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.
Wood beam safe load tables.
View size selection 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.
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.
These easy to use tables were compiled by the southern forest products association sfpa as a service to design build professionals and other.
Beam span maximums are based on a maximum anticipated live load.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
These columns are subject to axial compressive loads and in some cases eccentric loads.
Size selection tables headers beams.
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.
Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
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.
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.
View allowable load tables.
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.
These tables are provided as a guideline.
Table specifications are provided with each table indicating conditions and assumptions used to calculate the loads.
The species of lumber size of lumber and the load it carries.
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 capacity tables provide the uniformly distributed load that a glued laminated timber beam can support based on beam size span and material properties.
