Abacus Construction Index
UK: Roof Trusses: Roof Truss Suppliers
LEADING UK ROOF TRUSS SUPPLIERS
Click here for an easy-to-use listing of leading UK suppliers of roof trusses, provided by Archbone.
A roof truss is a prefabricated truss made of light timbers joined with nailplates and used in most new domestic roofs in industrialised countries. The roof truss has mostly superseded the cutting of rafters and ceiling joist on site, and is generally supported only on outer walls. Being close spaced and joined by roofing battens, trussed rafters share loads. Spans vary from 5m to 11m, slopes from 15 degrees to 35 degrees. Hip ends are made with a girder truss that carries the hip and jack trusses, and with smaller but similar truncated trusses. Roof corners may have saddle trusses on top of the standard trusses. The complete roof structure is delivered in bundles at wall plate level, lifted by a small crane on the delivery truck. After the trusses are stood up in place, truss clips are nailed on, as well as roofing battens and bracing.
Trussed rafters must be fully braced to give a rigid and stable roof. Omitted, wrongly position, or badly fixed bracing can allow distortion or collapse. Diagonal braces are fixed first, at about 45 degrees from eaves to ridge and between wall plates. Horizontal binders (running ties) then go lengthways, near the ridge, under the rafters, and over the ceiling, fixed near the nailplate joints. Large roof trusses (of more than 8m span) need chevron bracing on the truss diagonal members.
Minera is a leading supplier of roof trusses. Its roof truss manufacturing plant near Wrexham in North Wales has been operational since 1977 over which time almost a million trusses have been designed, fabricated and transported to all parts of the U.K. In 1985 Minera were the first company in the roof truss industry to offer a ‘just in time’ delivery, which has become established as the U.K’s only 5 day delivery nationwide from receipt of confirmation of an order.
As one of the first roof truss fabricators to establish an engineering design department at the truss plant, quality control methods were introduced over 15 years ago and this enabled Minera Roof Trusses to undertake complex roof projects working with architects and engineers.
Other useful links relevant to roof trusses and suppliers:
Timber Research & Development Association
DETAILED INFORMATION RESOURCES ON SUPPLIERS OF ROOF TRUSSES
We recommend the following websites, with building product information including manufacturers' specs, standard specifications, and CAD details: Barbour Compendium, RIBA Product Selector Plus, ASC Bricsnet, Building Products Index, British Board of Agrément, British Standards Online.
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Portals: Archbone, Beesker, Building Design, Homeone Australia, Lighting Directory, Sapling, Stone Network.
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