Floor Joist 4x4 Beam Span Table

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

Floor joist 4x4 beam span table.

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. Span calculator for wood joists and rafters 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. Let s expand our house beyond that 17 2 span capability to 24 feet wide.

2x6 if joists are spaced. A double 2x12 beam can span 12 feet. 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. Design properties 16 floor span and load tables 17 allowable holes 18 roof span and load tables 19 cantilevers 20 21.

A 2 2x10 can span 10 feet and so on. 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. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Dimensional lumber deck beam span chart.

2 and better southern pine or douglas fir joist. Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1. 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. View joist rafter tables.

Also available for the android os. 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. 2x6 if joists are spaced.

Floor joist span tables for various sizes and species of wood. Span tables for domestic floor joists to bs 5268 7 1 note. 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. So the house dimensions will now be 24 x 13.