Floor Joist 4x4 Beam Span Table

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.

Floor joist 4x4 beam span table.

Design properties 16 floor span and load tables 17 allowable holes 18 roof span and load tables 19 cantilevers 20 21. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Three or more load sharing members such as joists rafters or studs are spaced no more than 24 apart and are joined by floor ing sheathing or other load distributing elements. 2 and better southern pine or douglas fir joist.

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. View joist rafter tables. Distance a joist spans between a beam and a ledger or between beams using no.

Beam may be solely responsible for. Also available for the android os. This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance. These tables can also be used to determine deck joist span.

The numbers in gray indicate the distance between the support posts. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. Span tables for domestic floor joists to bs 5268 7 1 note. 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. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. 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. For example in the joist span table below the highlighted cell shows that 2 x 8 southern yellow pine joists that have a grade of 2 and are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. 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. A 2 2x10 can span 10 feet and so on. 2x6 if joists are spaced.