View joist rafter tables.
2x6 floor truss span chart.
Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00.
Geometry loading spacing bearing conditions etc.
Spacing of trusses are center to center in inches.
Maximum floor joist span for no.
Maximum deflection is limited by l 360 or l 480 under live load.
1 psf lb f ft 2 47 88 n m 2.
Floor truss span chart each individual floor truss design is unique based on multiple variables.
Floor joist span tables for various sizes and species of wood.
2 grade of douglas fir are indicated below.
Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91.
Span calculator for wood joists and rafters also available for the android os.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
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.
The 2 4 s and 2 6 s are considered to be in spf 3 stud and the 2 8 s and 2 10 s in spf 1 2.
Live load is weight of furniture wind snow and more.
Span tables below illustrate common combinations of the multiple variables available.
1 ft 0 3048 m.
See our complete chart of floor joist size span and spacing requirements before you build.
Strongbacks must be installed at mid span to achieve the maximum spans indicated for the vibration criterion in section 9 23 4 3 2 of the national building code of canada nbc.
Tcll 40 psf tcll 80 psf tcll 125 psf truss spacing truss spacing truss spacing.
We ve included 2x6 2x8 2x10 and 2x12 joist spans and more.
While every effort has been made to insure the accuracy of the information presented and special effort has been made to assure that the information reflects the state of the art neither the west coast lumber inspection bureau the american wood council nor its members assume any responsibility for any particular design prepared from this online span calculator.
