Patent ID: 6145267
Filing Date: 2000-11-14
Classification: B28B,E04B,Y10S

Abstract:
A construction unit comprising:an inner wall;an outer wall substantially parallel to said inner wall; anda web arrangement connecting said outer wall to said inner wall,wherein said inner wall and said outer wall together define an upper surface and a lower surface, both said surfaces are for engagement with adjacent courses of construction units, said construction unit has a height between said upper surface and said lower surface, and said upper surface and said lower surface are formed by engagement of said upper surface and said lower surface with walls of a mold from which the construction unit is slipped in a direction parallel to said walls of the mold,wherein said web arrangement comprises a web having, in a cross section parallel to said inner wall and said outer wall, a convex surface,wherein said convex surface has a first end, a second end, a first side, and a second side, said convex surface is continuously convex from said first end to said second end, and said convex surface is continuously concave from said first side to said second side in a direction generally transverse to said first and second sides.