Geometry loading spacing bearing conditions etc.
2x4 floor truss span chart.
If you have a single sloped roof then the 11 span distance for 2 4 rafters o c.
Maximum deflection is limited by l 360 or l 480 under live load.
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.
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.
Floor trusses have built in openings which can be used to install hvac ductwork plumbing lines and electrical wiring.
Basic lumber design values are f 2000 psi f 1100 psi f 2000 psi e 1 800 000 psi duration of load 1 00.
And parallel to floor truss span strongback lateral supports 24 max.
View joist rafter tables.
Also available for the android os.
Span calculator for wood joists and rafters also available for the android os.
Roof floor truss manual 7 31 08 10 43 am page 12.
Means that your shed should be no wider or longer depending on how you orientate your single sloped roof than 11.
Floor truss span chart each individual floor truss design is unique based on multiple variables.
Therefore for gable roofed sheds the rafter span table is indicating how far a rafter can span half of your shed s width.
Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
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.
Floor trusses can span farther between bearing points than i joists allowing for larger open rooms.
Spacing of trusses are center to center in inches.
Floor truss span tables alpine engineered products 17 these allowable spans are based on nds 91.
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.
This also reduces the need and cost for extra bearing posts beams and footings.
