Timber Floor Joist Spans

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

Timber floor joist spans.

No more custom made floor trusses. As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit. Timber building products manufactured for outdoor use in all. The following table gives details of allowable spans and spacing between joists for the most common timber sizes used in floor construction.

Maximum floor joist span for no. 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. Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders. View allowable load tables.

Live load 30 lbs ft 2 1436 n m 2. Also available for the android os. A few of the most common factors that affect joist span include. These elements will greatly affect how far you can span your joists.

2 grade of douglas fir are indicated below. 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. Dead load weight of structure and fixed loads 10 lbs ft 2. Engineered wood products ewp span and size charts for bci joists.

1 in 25 4 mm. The width is considerably more important than the thickness of a board. 1 psf lb f ft 2 47 88 n m 2. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

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. Internal floor joists f7 42mm 30 deck joists f7 42mm 31 deck bearers f7 32. 1 ft 0 3048 m. View joist rafter tables.

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. 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. Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed. View size selection tables.