Timber Floor Joist Spans

Timber building products manufactured for outdoor use in all.

Timber floor joist spans.

Dead load weight of structure and fixed loads 10 lbs ft 2. Maximum span of 2x12 floor joist the most important design choices to consider when building a home are the species and grade of wood that is being used as well as joist size and spacing. 1 psf lb f ft 2 47 88 n m 2. 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.

1 in 25 4 mm. All the figures are based on normal domestic floor loadings where the floor construction is typically 18 25mm floor boards sheets with up to 12 5mm thick plasterboard and skim underneath. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. No more custom made floor trusses.

View size selection tables. Engineered wood products ewp span and size charts for bci joists. Span calculator for wood joists and rafters also available for the android os. The width is considerably more important than the thickness of a board.

Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed. Live load 30 lbs ft 2 1436 n m 2. Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders. 2 grade of douglas fir are indicated below.

These elements will greatly affect how far you can span your joists. Maximum floor joist span for no. As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit. Trimjoist is the marriage of an open web floor truss and a trimmable wooden i joist bringing the best features of each to the relationship.

A few of the most common factors that affect joist span include. Live load is weight of furniture wind snow and more. For example you can span a 1 grade no knots southern yellow pine a greater distance than a 2 grade with knots southern yellow pine. Bci joists are specially constructed i joists with flanges made from strong versa lam laminated veneer lumber with oriented stranded board webs and approved waterproof structural adhesives providing outstanding strength and durability.

View joist rafter tables. Also available for the android os. 1 ft 0 3048 m. Internal floor joists f7 42mm 30 deck joists f7 42mm 31 deck bearers f7 32.