Dimensional Lumber Floor Span Chart

Live load is weight of furniture wind snow and more.

Dimensional lumber floor span chart. 2 grade of douglas fir are indicated below. Dimensional lumber deck beam span chart. Span calculator for wood joists and rafters also available for the android os. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size.

The 2012 irc code calls for a minimum of a 32 o c. Maximum floor joist span for no. Dead load weight of structure and fixed loads 10 lbs ft 2. Anything 5 and above we always at least double cripple.

A double 2x12 beam can span 12 feet. So the house dimensions will now be 24 x 13. Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope. 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.

Staggered pattern with at least a 3 x 120 nail. Also available for the android os. On longer spans the beam may require much more bearing space as indicated by this table. Tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications.

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. 1 ft 0 3048 m. Let s expand our house beyond that 17 2 span capability to 24 feet wide. Floor joist span tables for various sizes and species of wood.

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. 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. 1 psf lb f ft 2 47 88 n m 2. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

A 2 2x10 can span 10 feet and so on. Design properties 16 floor span and load tables 17 allowable holes 18 roof span and load tables 19 cantilevers 20 21 framing connectors 22 23. The numbers in gray indicate the distance between the support posts.