Timber Floor Joist Spans

These elements will greatly affect how far you can span your joists.

Timber floor joist spans.

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. Live load is weight of furniture wind snow and more. 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. View joist rafter tables.

The lengths and sizes of joists vary depending on the species and quality of the lumber used. 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. Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders. No more custom made floor trusses.

As the name trimjoist indicates our product can be trimmed on the construction site for a custom fit. 1 in 25 4 mm. 1 ft 0 3048 m. View size selection tables.

2 grade of douglas fir are indicated below. The following table gives details of allowable spans and spacing between joists for the most common timber sizes used in floor construction. 1 psf lb f ft 2 47 88 n m 2. 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.

Live load 30 lbs ft 2 1436 n m 2. Dead load weight of structure and fixed loads 10 lbs ft 2. Span tables f7 rafters a maximum roof pitch of 25 degrees is assumed. Maximum floor joist span for no.

View allowable load tables. The width is considerably more important than the thickness of a board. Engineered wood products ewp span and size charts for bci joists. Timber building products manufactured for outdoor use in all.

A few of the most common factors that affect joist span include. Also available for the android os. 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. Span calculator for wood joists and rafters also available for the android os.