The Trussed Rafter Association
Voice of the Trussed Rafter Industry

Why Choose a TRA Member?



All manufacturing members have registered with an independent quality assurance scheme to ensure truss rafters and metal web floors consistently meet the highest standards.


TRA members are committed to using the highest quality materials. All strength graded timber meets the requirements of EN14081 and the metal plates EN14545.


Every manufacturing member has professional indemnity (PI) insurance of at least £1 million.


TRA members use state of the art software to design trussed rafters and metal web joists to meet your exact requirements.


The TRA keeps its members ahead of the latest requirements and developments by participating in the drafting of all relevant National and European Codes & Standards.


The TRA’s dedicated technical and H&S committee’s are involved in all major regulation and decision-making forums including the NHBC, the HSE and trade organisations.


A multi-disciplined technical group keeps members updated with developments via the TRA technical hand book, regional meetings, monthly newsletters and technical bulletins.


Regular training sessions, seminars and online training courses aimed at designers are run to ensure members are conversant with the latest regulation changes.


TRA members offer a complete package, from feasibility to final design and supply service, no matter how simple or how complex the roof design.


All members are committed to the TRA's stringent standards of quality and service.


Trussed Rafters

Trussed rafters stand out as a sophisticated and highly-engineered product, with superior fabrication underpinned by high production standards. They are more flexible and more cost effective than many other methods of roof construction.

Metal Web Joists

With metal-web joists, not only can the floor span further than with conventional joisting methods, but the speed of installation both of the floor itself and the subsequent services in the floor zone is much faster.

Chain of Custody

Companies are independently assessed against “chain of custody” standards to demonstrate they can supply wood productsderived from sustainable forests.Two frameworks oversee  development of forest certification, these are Forest Stewardship Council (FSC),  Programme for Endorsement of Forest Certification (PEFC)

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