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===Arch structure=== | ===Arch structure=== | ||
[[File:arch-structure-1.jpg|thumb|right|CAD-model of the arch strucuture]] | [[File:arch-structure-1.jpg|thumb|right|CAD-model of the arch strucuture]] | ||
Arch structures and especially steel arch structures are a common sight in the US. Nowadays they are mostly used in agriculture as they are lightweight, easy to erect and cost effective. There are many companies which produce and sell steel arch buildings as prefabricated kits. For a short history see [http://www.ehow.co.uk/info_7754386_arch-types-aluminum-interlocking-buildings.html this website]. | |||
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