Patent ID: 7861346
Filing Date: 2011-01-04
Classification: E01D

Abstract:
1. A light to medium-duty bridge structure comprising: a plurality of interconnected corrugated metal plates defining a base of said bridge structure, said base having a shallow arched configuration along its lengthwise dimension and having a widthwise dimension less than said lengthwise dimension, said base only being supported adjacent its opposite ends, said base further having corrugations defined by alternating crests and troughs, each of said crests and troughs extending lengthwise between the opposite ends of said base generally parallel to a central longitudinal axis of the bridge structure, said base having an upper surface; a layer of settable concrete material applied directly to said upper surface, said layer of settable concrete material filling said troughs and extending above said crests thereby to define a support surface above said base; and a plurality of projections extending from the upper surface of said corrugated metal plates at spaced locations, said projections engaging said settable concrete material to provide a composite corrugated metal plate-concrete structure capable of supporting light to medium-duty loads.