The Timber Research and Development Association (TRADA)

The largest, most comprehensive supply chain body for timber in the UK, we are committed to growing your connections, knowledge, and influence.

The largest, most comprehensive supply chain body for timber in the UK, we are committed to growing your connections, knowledge, and influence.

... is the respected voice of the trussed rafter and metal web joist industry in the UK and is committed to stringent standards of quality and service and sets a professional benchmark for the industry.

The Structural Timber Association exists to represent the collective interest of its members by providing confidence in the use of structural timber across the construction industry.

CHAS is the UK’s leading provider of compliance and risk management solutions. Our award-winning solutions help contractors (suppliers) and clients (buyers) ensure supply chain compliance, mitigate risks and support efficient supply chain management.

... in association with Certification & Timber Grading (CATG) Frame Mark is timber frame quality assurance scheme ensuring that our trussed rafters, metal-web joists, spandrels, floor cassettes and timber frame panels meet the highest quality standard.