Floor Joist Span Table

Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Floor joist span tables for various sizes and species of wood. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12.

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Also available for the android os.

Floor joist span table.

This sample table gives minimum floor joist sizes for joists spaced at 16 inches and 24 inches on center o c for 2 grade lumber with 10 pounds per square foot of dead load and 40 pounds of live load which is typical of normal residential construction. Residential structural design vertical structural forces we were about to start learning about floor joist span tables. Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. Live load is weight of furniture wind snow and more.

Using floor joist span tables. Span calculator for wood joists and rafters also available for the android os. View joist rafter tables. Continuing on from part 1.

1 psf lb f ft 2 47 88 n m 2. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. Don t worry you won t need to do a lot of calculations in determining the size and placement of the structural framing within your house design. 1 ft 0 3048 m.

Dead load weight of structure and fixed loads 10 lbs ft 2. True floor joist span calculations can only be made by a structural engineer or contractor. Maximum floor joist span for no. 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.

2 grade of douglas fir are indicated below.