parallel stair

parallel stair

A stair consisting of flights which parallel each other and are separated only by one or more intermediate platforms.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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The ramp had been set in a series of parallel stairs towards the beginning that led to a cross-shaped ramp - a straight section moving forward and a horizontal section crossing it from the centre.
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