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Timber structures Roofs

“In a well-managed environment where workers are properly trained and guidelines are followed precisely, the risk of injury is minimised.”

T

russed rafters, or roof trusses, probably aren’t the first thing that comes to mind when you think of off-site manufactured products. Spandrel panels and metal web joists – common stablemates of trusses – don’t see much of the limelight, either. Despite languishing in the shadows, these products are becoming increasingly popular with housebuilders. Always produced using the latest timber technology, they are designed and manufactured on a bespoke basis.

Collaborative working Best practice in trussed rafter roof construction dictates that everyone involved with the design, manufacture and installation of the roof’s components must work effectively together. Typically, the first step in the process is for the building designer to provide a design for the roof. This is passed to the trussed rafter designer, who then produces a two-dimensional trussed rafter design. Trussed Rafter Association (TRA) members use the latest software to design trussed rafters to comply with BS EN 1995-1-1 (Eurocode 5).1 The trusses are also fabricated in accordance with BS EN 14250.2 Once the building designer has checked the trussed rafter design for structural compatibility with the roof design, production can begin.

Spandrel panels and gable wall panels Spandrel panels and gable wall panels offer an alternative to traditional masonry gable ends and separating walls within roof spaces. These panels are also manufactured off-site, bringing with them a range of benefits: • improvements to on-site safety, as pre-manufactured panels reduce the need for working at height on site • faster installation times, meaning lower costs • little or no waste left on site • using off-site manufactured products can help to address the shortage of on-site skills. >> www.trada.co.uk

Timber 2019 Industry Yearbook

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Profile for BM TRADA

Timber 2019 Industry Yearbook  

The annual publication of the Timber Research and Development Association (TRADA) includes topical and technical features on all aspects of...

Timber 2019 Industry Yearbook  

The annual publication of the Timber Research and Development Association (TRADA) includes topical and technical features on all aspects of...

Profile for trada
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