Timber Floor Joist Spans

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.

Timber floor joist spans.

Live load is weight of furniture wind snow and more. Span calculator for wood joists and rafters also available for the android os. Internal floor joists f7 42mm 30 deck joists f7 42mm 31 deck bearers f7 32. View allowable load tables.

Live load 30 lbs ft 2 1436 n m 2. Engineered wood products ewp span and size charts for bci joists. A few of the most common factors that affect joist span include. Also available for the android os.

View size selection tables. View joist rafter tables. 1 ft 0 3048 m. No more custom made floor trusses.

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. Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed. 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. 1 in 25 4 mm.

Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders. The width is considerably more important than the thickness of a board. The lengths and sizes of joists vary depending on the species and quality of the lumber used. Dead load weight of structure and fixed loads 10 lbs ft 2.

1 psf lb f ft 2 47 88 n m 2. 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. These elements will greatly affect how far you can span your joists. As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit.

2 grade of douglas fir are indicated below. Timber building products manufactured for outdoor use in all. Maximum floor joist span for no. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.