Let s say our house is 24 x 26.
Max floor joist span 2 x 12.
Floor joist span tables for various sizes and species of wood.
Span calculator for wood joists and rafters also available for the android os.
The considered subfloor is a 20 oc apa rated panel for joist s spacing of 12 16 and 19 2 o c.
2 grade of douglas fir are indicated below.
See the image below for an example of joists spaced 16 on center 16 o c.
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.
They also tell you what the maximum spacing should be between each section or timber member size of joists mm clear span c16 joist m clear span c24 joist m 47 x 95 47 x 120 47 x 145 47 x 170 47 x 195 47 x 220 1 77 2.
Looking at this table you will see there is a choice in the size of floor joist 2 x 6 2 x 8 2 x 10 or 2 x 12 and there is a choice in the joist spacing 12 16 or 14.
Dead load weight of structure and fixed loads 10 lbs ft 2.
What if we needed to span more than that.
The floor joist spacing is the distance between the centers of any two installed joists.
What size floor joist do i need for a 12 foot span.
See our complete chart of floor joist size span and spacing requirements before you build.
The subfloor must be glued as per apa specification afg 01 or astm d3498 and nailed as per nds icc ibc irc code.
1 psf lb f ft 2 47 88 n m 2.
Our floor joist beam can span a maximum of 13.
Other span tables are based on the guidance given in bs 5268 7 1 which is a uniformly distributed load of 1 5kn m for spans greater than 2400 mm and 3 6 kn load per metre width of floor for spans less than 2400 mm to ensure that very small joist sizes do not result from the calculations for smaller spans.
Span tables can be used to determine the size of a timber member of a particular strength class required for a given span.
Floor joist span tables calculator floor joist spans for home building maximum floor joist span 2x6 over a 14 span doityourself com.
Also available for the android os.
And is a 24 oc apa rated panel for joist s spacing of 24 o c.
1 ft 0 3048 m.
Maximum floor joist span for no.