Timber Floor Joist Span Tables Uk

Span tables determine the size of a timber member of a particular strength class required for a given span as well as the maximum spacing between each section or timber member.

Timber floor joist span tables uk.

Floor joist span tables for surveyors floor construction. Read the notes at the bottom of the table for assumptions references and related standards. This table uses commonly available uk regularised timber depths. The weight of the timber floor itself consists of the timber joists the plasterboard ceiling underneath it except for suspended timber ground floors the floorboards and the nails or screws used to fix both of the aforementioned coverings.

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. Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1. 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.

Joists are to have minimum end bearing of 40mm. These spans were calculated using our floor joist calculation engine. These span tables are the equivalent of other industry standard span tables and are calculated to the same standards. Timber to be covered these span tables do not apply to timber which is fully exposed to the elements.