Trada Span Tables Roof

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.

Trada span tables roof.

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. Timber to be covered these span tables do not apply to timber which is fully exposed to the elements. For pitched roofs flat roofs and ceiling joists. Timberconnectionspro ec5 edition based on the eurocodes 0 1 and 5 and their uk national annexes timberconnections is regularly reviewed and updated to keep abreast of any modifications and changes to the standards.

All the figures are based on roofing tiles or slates laid on timber laths over sarking felt. Span tables for solid timber members in floors ceilings and roofs for dwellings. 2nd edition trada. Pitched roof timber sizes the following tables give details of the allowable spans and spacing for some of the more common timber sizes used in traditional roofing construction.

Free trada span tables pdf supersedes. Now with lay flat wire binding bm trada s eurocode 5 span tables is a well established key resource in timber specification and building. Now in its 4th edition the trada span tables publication is a must for any designer or builder. It is an essential tool for calculating the size of solid softwood timber members necessary to give adequate support to floors ceilings and roofs in dwellings.

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. The tables cover softwood species and grade combinations which satisfy. Calculations are also given for canted purlins supporting roof sheeting or cladding and for flat roof joists. These span tables apply only to flat roof and roof with a slope of up to 10 degrees.

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. Span tables span tables can be. Surveyors span tables for designing roof rafters. Take a look here.

Notches are not to exceed 0 125 of the depth of the joist and are to be located between 0 07 and 0 25 of the span from the support.