The Arch

Paper Summary:

This paper examines arches, one of the most common and familiar architectural formations to the eye whether outside a building or in the shape of a bridge. It looks at how arches are generally of three types, rounded, pointed and segmental and evaluates their structural advantages. The robust nature of masonry in constructing arch structures is illustrated by the longevity of the many ruins in Britain, many dating from the dissolution of the monasteries. It shows how arches have also been much used in modern architecture, usually in public buildings, such as the Sydney Opera house, where a striking appearance combined with strong acoustical support is critical.

From the Paper:

"Arches are also evident in doorways, forming the curved top to a door or an open entryway. An entryway that is not supporting a wall is obviously less in need of material reinforcement than one bearing down a wall. A rounded arch shape, rather than a square shape always provides more support and reinforcement than a straight edge, because the pressure is distributed across more pressure points along the curved as opposed to a straight edged entry structure. This is one reason why a rounded shape is so popular for entryways. (Durkin "Architectural Terms")"

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