The numbers in gray indicate the distance between the support posts.
Wood beam span table uk.
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.
A 2 2x10 can span 10 feet and so on.
Headers beams.
Span calculator for wood joists and rafters also available for the android os.
Other span tables are based on the guidance given in bs 5268 7 1 which is a uniformly distributed load of 1 5kn m for spans greater than 2400 mm and 3 6 kn load per metre width of floor for spans less than 2400 mm to ensure that very small joist sizes do not result from the calculations for smaller spans.
A double 2x12 beam can span 12 feet.
When supporting joists that span 12 feet with no overhang beyond the beam a double ply beam can span in feet a value equal to its depth in inches.
Span tables for domestic floor joists to bs 5268 7 1 note.
This should be compared to the table.
Surveyors and structural engineers utilise data from tables below to help calculate the correct size strength and centres of roof timbers for the required spans and loadings.
If a joist s max.
This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance.
The following span tables are indicative of some of the spans required for domestic floor joists where c16 and c24 strength classes are used.
For pitched roofs flat roofs and ceiling joists.
You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.
This table is for a dead load of more than 0 25 but not more than 0 50 and allows for an imposed loading of no more than 1 5 kn sq m.
It is assumed that for built in joists that the masonry is 100mm wide and for joists on hangers the hanger has a 75mm bottom plate.
0 003 x engineering span or 12mm whichever is lesser.
Surveyors span tables for designing roof rafters.
Dimensional lumber deck beam span chart.
They refer to a dead load of not more than 0 5kn m 2 excluding the weight of the joist and an imposed load not exceeding 1 5 kn m 2.
Centres is the maximum centres that this joist can be used for in this application.
Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.
