Surveyors span tables for designing roof rafters.
Trada roof trusses.
With roof trusses large spans and challenging roof contours are no barrier to creating innovative eye catching design solutions.
For pitched roofs flat roofs and ceiling joists.
The tda trusses were built on site using toothed plate connectors and were based on standard designs that were published by the timber development association tda the forerunner of the timber research and development association trada.
The trusses supported purlins and binders which in turn supported rafters and ceiling joists.
They have been popular since the 1960s.
Many tra members specialise in the delivery of commercial trussed rafters supplying roofs for hospitals supermarkets schools and many other large public spaces and designed to the eurocode 5 design code for best.
Trussed rafters are individually designed prefabricated structural components made from strength graded timber members of the same thickness joined together with punched metal plate connectors.
Widely used for a range of building types trussed rafters are an economical versatile and straightforward solution to providing a roof to a building.