Patent ID: 6311442
Filing Date: 2001-11-06
Classification: E04B,E04F

Abstract:
An external corner formative member, comprising an angled corner plate portion having opposite side edges, and a pair of groove portions extending from and formed integrally with the side edges, said groove portions being connected only through said corner plate portion, each groove portion including:a front plate, a back plate, and a bottom plate extending therebetween to define a space for receiving a side edge portion of a building board to be fitted in said groove portion; andat least one rib projecting from the bottom plate into said space for contacting a surface of said side edge portion of said building board and hence functioning as a weir to prevent rain water from passing around said building board;wherein a first space defined by the front plate, the bottom plate, the at least one rib and said side edge portion of said building board is smaller than a second space defined by the back plate, the bottom plate, the at least one rib and said side edge portion of said building board.