Patent ID: 6854925

Claim:
A multi-layer gallery having an elongated arched body and first and second ends, the elongated arched body forming an elongated arched interior space with an open bottom for liquid to flow therethrough, the multi-layer gallery comprising: a first exterior layer forming a smooth continuous surface along a substantial length of the gallery; a second middle layer forming a plurality of spaced apart upstanding ribs along a length of the gallery; and a third interior layer forming a smooth continuous surface along a second substantial length of the gallery; a connecting mechanism located at the first and second end of the multi-layer gallery for connecting the gallery together with another gallery in an end-to-end relationship, the connecting mechanism comprising a starting rib located at the first end of the gallery, and an end rib located at the second end of the gallery, such that a first gallery and a second gallery may be connected together by overlapping a starting rib of the first gallery over an end rib of the second gallery.