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Roofbox above Newgrange Passage Entrance. In archaeology, a roofbox is a term for a specially contrived opening above a doorway, that is constructed in such way that at particular times of the year e.g. the winter or summer solstices, the Sun would be directly in view from the chamber or passage within.
T-beams are similar to double tees but can be used for span ranging from 30 feet (9.1 m) to 100 feet (30 m). Joists and planks are combination of using prestressed joists with prestressed planks. Keystone-shape joists can be used for up to 36-foot (11 m) spans and tee-shape joists can be used for up to 60-foot (18 m) span.
A box gutter, internal gutter, parallel gutter, or trough gutter is a rain gutter on a roof usually rectangular in shape; it may be lined with EPDM rubber, metal, asphalt, or roofing felt, and may be concealed behind a parapet or the eaves, or in a roof valley. [1] [2] Box gutters are essentially placed between parallel surfaces, as in a valley ...
Hebden Bridge signal box A number of signal boxes in England are on the Statutory List of Buildings of Special Architectural or Historic Interest. Signal boxes house the signalman and equipment that control the railway points and signals. Originally, railway signals were controlled from a hut on a platform at junctions. In the 1850s, a raised building with a glazed upper storey containing ...
In the UK, 50–80 thatched roofs are destroyed in house fires yearly. [22] Because thatching is labour-intensive, it is much more expensive to thatch a roof than to cover it with slate or tiles. Birds can damage a roof while they are foraging for grubs, and rodents are attracted by residual grain in straw. [citation needed]
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Metal roofs are 100% recyclable and can be made from other recycled products. Asphalt shingles are petroleum based with other chemicals making their recycling process more toxic, most shingles are not recycled and 20 billion pounds (9.1 million tonnes) are sent to landfills every year and take hundreds of years to decompose.
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