2X12 Floor Joist. Simplified maximum span tables for selected visual and mechanical grades of Southern Pine lumber in sizes 24 thru 212. Joist Span Table for Floor Joists Floor Joist Span Tables for various Sizes and Species of Wood.
Of 14 feet for a triple 2x12. The floor joist spacing is the distance between the centers of any two installed joists. For example a joist made from doubled 2 x 6s can span a distance about 25 percent more than a single 2 x 6 but a 2 x 12 can span about 80 percent more than a 2 x 6 even though it has the same amount of wood as a doubled 2 x 6.
Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.
Of 14 feet for a triple 2x12. In general terms joists spaced 16 inches on center can span 15 times in feet their depth in inches. Uses wood properties from the 2012 NDS. For pricing and availability.
