Trada Floor Joist Span Tables

Tables 1 and 2 in this chapter are derived from the trada technology ltd.

Trada floor joist span tables. The following table gives details of allowable spans and spacing between joists for the most common timber sizes used in floor construction. Joist span table use these tables to determine floor joist spans based on grade of lumber size of joist floor joist spacing and a live load of 30 lbs ft 2 or 40 lbs ft 2 these tables can also be used to determine deck joist span. 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. Span tables for solid timber floor joists.

Floor joist span tables for surveyors floor construction. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Floor joist span tables for various sizes and species of wood. For timber floors between homes.

Span tables for solid timber joists. Other span tables are based on the guidance given in bs 5268 7 1 which is a uniformly distributed load of 1 5kn m for spans greater than. For pitched roofs flat roofs and ceiling joists. Eurocode 5 span tables for solid timber members in floors ceilings and roofs for dwellings 3rd edition.

This should be compared to the table. The section sizes of the floor joists given in tables 1 and 2 should be regularised or be als or cls. Eurocode 5 span tables. You need to measure the complete span of your floor joists together with the distance between them the centres and the size of the timbers.

Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance. Span tables for domestic floor joists to bs 5268 7 1 note. Easy to look up tables allow the reader to choose the size of solid softwood timber members necessary to give adequate support to floors ceilings and roofs in dwellings.

Tables 1 and 2 in this appendix are derived from a trada technology ltd. Now in its 4th edition the trada span tables publication is a must for any designer or builder. Publication span tables for solid timber members in floors ceilings and roofs excluding trussed rafter roofs for dwellings. If your old joists do not meet the requirements set by the table they are either supported.

Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1. Surveyors and structural engineers utilise data from tables below to help calculate the correct size strength and centres of roof timbers for the required spans and loadings. Surveyors span tables for designing roof rafters.