Table specifications are provided with each table indicating conditions and assumptions used to calculate the loads.
Wood beam span table.
On longer spans the beam may require much more bearing space as indicated by this table.
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.
Sample floor beam span table.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
Window door garage door headers supporting roof wall floor loads.
The table below shows an excerpt from a maximum span for built up douglas fir floor beams table for supporting not more than one floor.
Anything 5 and above we always at least double cripple.
Window door garage door headers supporting roof loads only.
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.
According to the 2012 irc codes any beam joist or header shall never have a bearing of less than 1 1 2.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
This table is simply a sample and may not be valid for your region.
However this seems to match the 6 joist span column of the table.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
Aitc capacity tables provide the uniformly distributed load that a glued laminated timber beam can support based on beam size span and material properties.
Versa lam laminated veneer lumber lvl beams and headers eliminate twisting shrinking and splitting and deliver flatter quieter floors and structures.
Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
Michael t 5 17 2017 12 53 19 am reply.
Also available for the android os.
Aitc beam capacity tables.
Our versa lam lvl is manufactured in either alexandria lena louisiana in eastern united states or in white city oregon for the western united states.
These tables are provided as a guideline.
Beams of more than one ply must be fastened together with either nails or bolts.
There are several beam span tables for all the species of wood.
Span calculator for wood joists and rafters also available for the android os.
In the article it is stated that a 12 joist span corresponds to the double beam span a length equal to the 2x width.
This span table excerpt shows two possible sizes.
