Patent ID: 8033759

Claim:
A modular wall which comprises: at least two U-shaped hollow polymeric modules, each of said modules having a closed end and an open end, each module having at least two essentially parallel opposing vertical side panels, each surface of said opposing vertical side panels having a pair of ends, and a vertical transverse panel connecting one pair of ends, each side and transverse panel combination joined to form a vertical edge at said closed end; said transverse panel having a pair of vertical outwardly-facing J-shaped hooks near said vertical edges and extending a vertical length essentially equal to a length of said vertical edges; each open end of said polymeric modules having a pair of inwardly-facing fingers which mate with an adjacent outwardly-facing J-shaped hook on an adjacent polymeric module; said J-shaped hook having a base member which extends from said transverse panel vertically and essentially parallel to said side panels and at least partially bends at an acute angle to said base member; said mating J-shaped hook and finger combination being in engagement at an acute angle; each mating J-shaped hook and finger combination comprising two essentially parallel, essentially vertical surfaces, said surfaces having a gap between at least a portion of said vertical surfaces to allow fluid flow therebetween; either of said two essentially parallel, essentially vertical surfaces for said mating J-shaped hook and fingers combination contains at least one aperture; and a depth of said fingers and a penetration depth of said J-shaped hook being essentially equal to minimize a size of indentations between adjacent side wall panels in said wall when said modules are interconnected.