Roof Joist Span Calculator Uk

These span tables are the equivalent of other industry standard span tables and are calculated to the same standards.

Roof joist span calculator uk.

For pitched roofs flat roofs and ceiling joists. These spans were calculated using our flat roof joist calculation engine. In snowy areas your roof should be at least 10 12 40 to allow snow to shed while the safest roof pitch in very windy areas is between 4 12 6 12 18 5 26 5. For a gothic style the rafters must equal the span 60 while an elizabethan style requires the rafters to be longer than the span.

Simply enter the required span to see a range of results that will work. Surveyors span tables for designing roof rafters. Also available for the android os. This span table is to the format and methodology given in bs 5268 7 2.

Span calculator for wood joists and rafters also available for the android os. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. 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. Floor joist span tables for surveyors floor construction.

Try our interactive span checker to find the posi joist suitable for your project. You will be given a range of depths and centres that are available and also an indicative deflection result. Span tables for flat roof joists to bs 5268 7 2 imposed loads of 0 75 kn m for maintenance and snow load are applicable where there is no permanent access no fixed ladder or staircase and most areas where the altitude does not exceed 100 metres refer to bs 6399 3. Surveyors and structural engineers use data from tables below to help calculate the size of timbers necessary to give adequate support to timber floors.

Should refer to trada document span tables for solid timber members in floors ceilings and roofs excluding trussed rafter roofs for dwellings or ask your lbc surveyor for advice. If supporting lightweight partitions running parallel to joists provide two additional joists under each partition. This table uses commonly available uk regularised timber depths.