According to the 2012 irc codes any beam joist or header shall never have a bearing of less than 1 1 2.
Wood beam span length.
On longer spans the beam may require much more bearing space as indicated by this table.
Bci joists are specially constructed i joists with flanges made from strong versa lam laminated veneer lumber with oriented stranded board webs and approved waterproof structural adhesives providing outstanding strength and durability.
Also available for the android os.
The distance over which a wood beam bears a load when used for support is its span.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
The span of any wood beam depends on many factors such as type of wood weight of the load and overall size of the beam.
View joist rafter tables.
Beams of more than one ply must be fastened together with either nails or bolts.
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.
Span calculator for wood joists and rafters also available for the android os.
Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1.
Window door garage door headers supporting roof loads only.
Anything 5 and above we always at least double cripple.
While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator.
For example a 3 ply 2x8 beam would use three 2x8s nailed together side by side.
Window door garage door headers supporting roof wall floor loads.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance.
These nine beam spans are for built up beams made up of either 2x8 2x10 or 2x12 dimensional lumber nailed together as either 3 4 or 5 ply beams.
Engineered wood products ewp span and size charts for bci joists.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
The values displayed in the resulting table will show nine possible maximum beam spans for the supported length selected.
