It soon became a common construction material in rural areas in the United States, Argentina, Spain, New Zealand and Australia and later India, and in Australia and Argentina also became (and remains) a common roofing material even in urban areas. It proved to be light, strong, corrosion-resistant, and easily transported, and particularly lent itself to prefabricated structures and improvisation by semi-skilled workers. It was originally made from wrought iron produced by puddling. Henry Robinson Palmer, architect and engineer to the London Dock Company, was granted a patent in 1829 for "indented or corrugated metallic sheets". On display at Kapunda museum, South Australia Contemporary use of corrugated galvanised iron in architecture (Australia) History Early manual corrugated iron roller. Its unique properties were used in the development of countries such as Australia from the 1840s, and it is still helping developing countries today. It was and still is widely used especially in rural and military buildings such as sheds and water tanks. Normally each sheet is manufactured longer in its strong direction.ĬGI is lightweight and easily transported. The corrugations increase the bending strength of the sheet in the direction perpendicular to the corrugations, but not parallel to them, because the steel must be stretched to bend perpendicular to the corrugations. Although it is still popularly called "iron" in the UK, the material used is actually steel (which is iron alloyed with carbon for strength, commonly 0.3% carbon), and only the surviving vintage sheets may actually be made up of 100% iron. The galvanised sheet is viewed from below and is supported by a piece of angle iron (painted white).Ĭorrugated galvanised iron or steel, colloquially corrugated iron (near universal), wriggly tin (taken from UK military slang), pailing (in Caribbean English), corrugated sheet metal (in North America), or custom orb / corro sheet (Australia) and occasionally abbreviated CGI is a building material composed of sheets of hot-dip galvanised mild steel, cold-rolled to produce a linear ridged pattern in them. Type of metal building material Corrugated galvanised iron roofing in Mount Lawley, Western Australia A corrugated iron church (or tin tabernacle) in Kilburn, London Typical corrugated galvanised iron appearance, with visible large flake type patterns.
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