Floor Joist 4x4 Beam Span Table

View joist rafter tables.

Floor joist 4x4 beam span table.

Also available for the android os. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. 2x6 if joists are spaced. Design properties 16 floor span and load tables 17 allowable holes 18 roof span and load tables 19 cantilevers 20 21.

2x6 if joists are spaced. Joists design properties 6 floor span and load tables 7 8 tips for preventing floor noise 8 allowable holes 9 cantilevers 10 11 roof span and load tables 12 13 framing connectors 14 15 section 2. Dimensional lumber deck beam span chart. Distance a joist spans between a beam and a ledger or between beams using no.

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. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. True floor joist span calculations can only be made by a structural engineer or contractor. Joist span table use these tables to determine floor joist spans based on grade of lumber size of joist floor joist spacing and a live load of 30 lbs ft 2 or 40 lbs ft 2 these tables can also be used to determine deck joist span.

This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction. 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. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Span calculator for wood joists and rafters also available for the android os. A 2 2x10 can span 10 feet and so on. Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1. 2 and better southern pine or douglas fir joist.

A double 2x12 beam can span 12 feet. This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.