Contractor using compressed air nailgun joins prefabricated roof trusses together with galvanised plates on a public building.
Traditional roof construction uses heavy and expensive timber beams attached to load-bearing cross walls that, when completed, leave a useful space that can be utilised for storage or other purposes. Modern trussed rafter roofing is a cheaper and lightweight alternative that uses many small bracing timbers, rather than large single beams. The complex engineering calculations are made on proprietary computer programs, the trusses are prefabricated off-site and lifted into position by crane. Once joined together by galvanised fixing plates and diagonally braced, the floppy trusses are transformed into an immensely strong roofing structure. One disadvantage is that so much timber is used, there is very little roof space available for other purposes. In Europe, the construction industry is responsible for around 50% of energy consumption. Modern building materials, such as metal, concrete and brick, require the expenditure of considerable energy resources to extract, process, manufacture and transport them to the construction site. Wood, by contrast, being a renewable resource, is far more environmentally friendly and has a particular value in addressing global warming issues. Timber produced in renewable forests works as a 'carbon sink' removing carbon from the atmosphere and considerably less energy is needed to produce wood products than its steel and concrete counterparts and to recycle it at the end of its useful life. Timber-framed (or modular) prefabricated structures save time and money compared with building from scratch because the components are produced in factories and quickly assembled on site. Modular structures are produced across a wide range of possibilities from small domestic housing to huge commercial structures that can be easily taken apart and modified to meet future requirements.
Size: 3307px × 3307px
Location: Hertford, UK.
Photo credit: © qaphotos.com / Alamy / Afripics
License: Licensed
Model Released: No
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