Floor Joist 4x4 Beam Span Table

The widest span in the floor joist span table in part 2 of this tutorial module showed that floor joists can span 17 2 if they are 2 x 12s spaced 12 o c. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance.

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The numbers in gray indicate the distance between the support posts.

Floor joist 4x4 beam span table.

Distance a joist spans between a beam and a ledger or between beams using no. 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. View joist rafter tables. Let s expand our house beyond that 17 2 span capability to 24 feet wide.

Design properties 16 floor span and load tables 17 allowable holes 18 roof span and load tables 19 cantilevers 20 21. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Also available for the android os. 2 and better southern pine or douglas fir joist.

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. 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. Floor joist span tables for various sizes and species of wood. 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.

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. 2x6 if joists are spaced. Span tables for domestic floor joists to bs 5268 7 1 note. So the house dimensions will now be 24 x 13.

Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. A 2 2x10 can span 10 feet and so on. 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.

2x6 if joists are spaced. A double 2x12 beam can span 12 feet. Dimensional lumber deck beam span chart. Span calculator for wood joists and rafters also available for the android os.