Trada Roof Timber Span Tables

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.

Trada roof timber span tables.

They also tell you what the maximum spacing should be between each section or timber member 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. Tables 1 and 2 in this chapter are derived from the trada technology ltd. So you can have confidence in the calculation results it produces. Other more complex load condition spans can be determined with our free hyne timber design 7 5 software.

Span tables allow users to choose an appropriate size and stress grade to achieve spanning needs. Now in its 4th edition the trada span tables publication is a must for any designer or builder. View size selection tables. 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 span tables for designing roof rafters. Span tables span tables can be used to determine the size of a timber member of a particular strength class required for a given span. For timber floors between homes. The section sizes are based on regularised als or cls timber.

View allowable load tables. N ote the spansgiven in pa rt4b ofsection4 forfloorjoists rafters purlins ceilingjoists bindersand roofjoistsareclearspans i e spansbetween the facesofthesupports. For simple construction such as domestic construction this can be determined from span table supplements in as1684 2 and as1684 3. Span tables for solid timber joists.

View joist rafter tables. Supported wall a walltowhich lateralsupportisaffordedby a. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Hello there friend i am fref to this forum and came across the info regarding span tables i have been searching in vain for weeks trying to obtain themmy building project has been on hold would there be any chance that you would be able to email a copy of the span tables to me it would be greatly appreciated i yables then start the roof project.

For pitched roofs flat roofs and ceiling joists. Consistent with trada s eurocode 5 span tables timbersizerpro uses the same calculation engine as the new version of the trada publication eurocode 5 span tables for solid timber members in floors ceilings and roofs for dwellings. Eurocode 5 span tables for solid timber members in floors ceilings and roofs for dwellings 3rd edition.