Patent ID: 8677713

Claim:
A wall member useful in forming a wall panel system comprising: a pair of outer walls spaced apart and fixed together by end crosspieces at a pair of opposed side edges, one of the side edges being provided with a first connecting structure and the other of the side edges being provided with a second connecting structure which is structurally different than the first connecting structure, wherein the first and second connecting structure includes a number of tubular projections secured to and extending outwardly from the side edges and the end crosspieces, and constructed with snap fit elements that are separately located from the outer walls, and defined by grooved walls forming engagement surfaces of the tubular projections and located outwardly of the end crosspieces; and whereby the wall member is adapted to be joined to an adjacently disposed wall member of similar structure by direct snap fit mating engagement between one of the first and second connecting structure at one of the side edges of the wall member and the other of the first and second connecting structure on a facing side edge of the adjacently disposed wall member.