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The Timber Research and Development Association (TRADA) - "is an internationally recognised centre of excellence on the specification and use of timber and wood products." - TRADA website.


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Trussed Rafter Association

"TRA is committed to raising standards in the industry, with all Members having to meet TRA''s mandatory requirements for third-party supervised Quality Assurance and Professional Indemnity insurance helping to ensure quality in the design and manufacture of trussed rafters." - TRA Website




The UK Timber Frame Association (UKTFA) is the trade association representing over 85% of UK timber frame manufacturers and also the sectors key suppliers.

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