Timber Floor Joist Spans

View joist rafter tables.

Timber floor joist spans. The following table gives details of allowable spans and spacing between joists for the most common timber sizes used in floor construction. Floor joist span tables for surveyors floor construction. This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance. 2 grade of douglas fir are indicated below.

1 ft 0 3048 m. Also available for the android os. 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. Code of practice for permissible stress design materials and workmanship and bs 5268 7 1 1990 structural use of timber section 7 1 domestic floor joists.

1 psf lb f ft 2 47 88 n m 2. This chart is for basic reference only. Span tables for domestic floor joists to bs 5268 7 1 note. Dead load weight of structure and fixed loads 10 lbs ft 2.

Our joist span charts are for wood joists with a maximum dead load of 10 pounds per square foot and a live load of 40 pounds per square foot. View size selection tables. Spans of timber joists in suspended timber ground floors span tables. The allowable clear spans have been calculated in accordance with bs 5268 2 2002 structural use of timber part 2.

Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1. True floor joist span calculations can only be made by a structural engineer or contractor. View allowable load tables. Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall.

Live load is weight of furniture wind snow and more. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size. Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders. If you have any questions.

Dead load is the weight of the structure and any fixed items. Maximum floor joist span for no. Surveyors and structural engineers use data from tables below to help calculate the size of timbers necessary to give adequate support to timber floors. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.