Floor Span For 2x12

Span calculator for wood joists and rafters also available for the android os.

Floor span for 2x12.

When supporting joists that span 12 feet with no overhang beyond the beam a double ply beam can span in feet a value equal to its depth in inches. See our complete chart of floor joist size span and spacing requirements before you build. A double 2x12 beam can span 12 feet. Dimensional lumber deck beam span chart.

Boards cut and graded as structural select allow the longest spans. 3 due to fewer knots and defects in the grain of the wood. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. It also shows the maximum that the beam can span for various numbers of such pieces of lumber built together this is indicated by 3 ply 4 ply and 5 ply.

3 allow shorter spans. 1 has a higher strength than no. 2 grade of douglas fir are indicated below. True floor joist span calculations can only be made by a structural engineer or contractor.

Three other grades no. 1 psf lb f ft 2 47 88 n m 2. A 2 2x10 can span 10 feet and so on. Floor joist span tables for various sizes and species of wood.

Live load is weight of furniture wind snow and more. The numbers in gray indicate the distance between the support posts. We ve included 2x6 2x8 2x10 and 2x12 joist spans and more. This span table excerpt shows two possible sizes of built up floor beams 2 x 10 and 2 x 12.

Dead load weight of structure and fixed loads 10 lbs ft 2. Maximum floor joist span for no. Spans in this table were derived from the irc table r502 3 1 2 design criteria. Floor joists support structural load and require lumber species capable of supporting those loads.

The full table shows more lumber sizes. 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. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. 1 ft 0 3048 m.