Timber Floor Joist Span Tables Uk
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.
Timber floor joist span tables uk. Timber to be covered these span tables do not apply to timber which is fully exposed to the elements. Span tables for domestic floor joists to bs 5268 7 1 note. This table uses commonly available uk regularised timber depths. Floor joist span tables for surveyors floor construction.
Our floor joist span tables are based on loadings given in the newer amended version of bs 6399 1. 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. These spans were calculated using our floor joist calculation engine. Wane as allowed in bs 4978 2007 a2 2017 is permitted in all sections included in these span tables.
This means that some values are slightly more conservative than span tables from other sources if those do not include the amended guidance. Read the notes at the bottom of the table for assumptions references and related standards. 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. The following table gives details of allowable spans and spacing between joists for the most common timber sizes used in floor construction.