Eurocode 5 span tables.
Flat roof joist span table uk.
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.
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.
These span tables apply only to flat roof and roof with a slope of up to 10 degrees.
The following easi joist span tables are to be used as a basic guide to achievable joist span for given depth and spacing and should be used for estimating of feasibility only.
All the figures are based on the normal loading conditions.
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.
Maximum clear span of flat roof joists in metres for sc3 timber spacing between joists size of roof joist 400mm 450mm 600mm 47 x 97 1 84 1 81 1 74.
Size of joists mm clear span c16 joist m clear span c24 joist m 47 x 95 47 x 120 47 x 145 47 x 170 47 x 195 47 x 220 1 77 2 40 2 89 3 38 3 87 4 36 2 04 2 75 3 47 4 20 4 93 5 66 floor joists flat roof joists assumptions at 400mm centers supporting permanent load excluding self weight of joists up to 50kg m2.
Joists under each partition.
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.
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.
Surveyors span tables for designing roof rafters.
Tables 1 and 2 in this chapter are derived from the trada technology ltd.
Span tables for solid timber joists.
Timber to be covered these span tables do not apply to timber which is fully exposed to the elements.
Due to variations in timber grades load sets support conditions and bearing widths the tables are not suitable as a design tool.
This should be compared to the table.
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.
For timber floors between homes.
Floor joist span tables for surveyors floor construction.
The section sizes are based on regularised als or cls timber.
