Floor Joist 4x4 Beam Span Table

Span tables for domestic floor joists to bs 5268 7 1 note.

Floor joist 4x4 beam span table.

Distance a joist spans between a beam and a ledger or between beams using no. Floor joist span tables for various sizes and species of wood. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. View joist rafter tables.

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. 2x6 if joists are spaced. Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Also available for the android os. 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. Design properties 16 floor span and load tables 17 allowable holes 18 roof span and load tables 19 cantilevers 20 21. A double 2x12 beam can span 12 feet.

2x6 if joists are spaced. 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. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.

2 and better southern pine or douglas fir joist. Dimensional lumber deck beam span chart. Span calculator for wood joists and rafters also available for the android os. 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.

A 2 2x10 can span 10 feet and so on. True floor joist span calculations can only be made by a structural engineer or contractor. 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.