Expansion seal

An expansion joint seal for effectively sealing relatively larger size gaps between spaced-apart structural members while providing adequate vertical support, said seal comprising:

• an elongated body including longitudinal side edges, an upper corrugated treadway surface integrally connected to an upper portion of each of said side edges, a lower undersurface integrally connected to a lower portion of each of said side edges, and an internal web structure confined within the boundaries of said longitudinal side edges, said upper treadway surface and said lower undersurface, said internal web structure comprising:
• a plurality of laterally spaced, vertically disposed webs, an upper pair of cross-bars extending upwardly and outwardly from the upper end of each of said vertically disposed webs and connected to said upper treadway surface, a lower pair of cross-bars extending downwardly and outwardly from the lower end of each of said vertically disposed webs and connected to said lower undersurface;
• a central, vertically disposed lower web integrally connected at its upper end to one cross-bar each of an adjacent pair of said lower cross-bars and integrally connected at its lower end to said undersurface;
• additional lower cross-bars extending from said side edges downwardly and inwardly and directly connected to said undersurface, the outermost ends of each of the outermost of said lower cross-bars joining the adjacent additional lower cross-bar intermediate the ends thereof;
• and
• the lower cross-bars extending downwardly and inwardly from the outermost of said vertically disposed webs being integrally connected with the lower cross-bars extending downwardly and outwardly from the inwardly adjacent vertically disposed webs at a point intermediate the ends of said last-named cross-bars.