arch
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arch
HB50
curved, load-carrying monolithic or composite structure or member which spans an opening or recess and is essentially in compression
Loads supported by an arch are resolved into vertical and horizontal forces at supports. Before the advent of structural steel, masonry arches of a variety of shapes provided a major means of achieving long spans in buildings or structures. While most arches are of semicircular or segmental shape, many variations of arch shapes have been used.