Patent ID: 9163392
Filing Date: 2015-10-20
Classification: E01F,E04B

Abstract:
1. An arch-shaped overhead structure comprising: a curved metal archway having a crown section and haunch sections, said metal archway comprising a plurality of interconnected corrugated metal plates arranged to define corrugations extending transversely of the longitudinal length of said metal archway, said corrugations comprising alternating crests and troughs; and reinforcement ribbing secured to an outer surface of said metal archway at spaced locations along the longitudinal length of said metal archway so that at least one crest between successive spaced locations is free of reinforcement ribbing, at each of said spaced locations said reinforcement ribbing extending transversely of the longitudinal length of said metal archway along the crown and haunch sections of said metal archway, and at each of said spaced locations said reinforcement ribbing comprising a plurality of longitudinally curved, roll-formed, narrow and twist free elongate reinforcement ribs arranged in an end-to-end fashion, each of said reinforcement ribs being secured to a pair of crests and spanning at least one trough, each of said reinforcement ribs comprising a pair of laterally spaced generally planar sidewalls extending outwardly from said outer surface, a generally planar top wall spaced from the outer surface of said metal archway and extending between and bridging one end of each side wall and a generally planar lower flange extending from an opposite end of each sidewall, each lower flange overlying and being secured to a respective one of said pair of crests, wherein said sidewalls are inwardly angled in a direction towards the top wall and wherein an undersurface of each flange is concave and has a shape complimentary to that of the respective one of said pair of crests.