2x4 Floor Truss Span Chart

This also reduces the need and cost for extra bearing posts beams and footings.

2x4 floor truss span chart.

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. If you have a single sloped roof then the 11 span distance for 2 4 rafters o c. 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. Roof truss span tables alpine engineered products 15 top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 bottom chord 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2 12 24 24 33 27 27 37 31 31 43 33 33 46 2 5 12 29 29 39 33 33 45 37 38 52 39 40 55 3 12 34 34 46 37 39 53 40 44 60 43 46 64 3 5 12 39 39 53 41 44 61 44 50 65 47 52 70.

Roof floor truss manual 7 31 08 10 43 am page 12. Span calculator for wood joists and rafters also available for the android os. Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91. Floor truss span chart each individual floor truss design is unique based on multiple variables.

Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. Geometry loading spacing bearing conditions etc. Tcll 40 psf tcll 80 psf tcll 125 psf truss spacing truss spacing truss spacing.

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Floor trusses have built in openings which can be used to install hvac ductwork plumbing lines and electrical wiring. View joist rafter tables. And parallel to floor truss span strongback lateral supports 24 max.

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. Therefore for gable roofed sheds the rafter span table is indicating how far a rafter can span half of your shed s width. Maximum deflection is limited by l 360 or l 480 under live load. 72 5 0 mi ni m u m girder floor truss floor truss jacks a a bearing wall girder floor truss floor truss jacks bearing wall cantilevered floor truss two 2x rim joists 24 max.

Span tables below illustrate common combinations of the multiple variables available. Spacing of trusses are center to center in inches.