Liner arrangement for refrigerated trailers

Claim 1

In a refrigerated trailer body having side walls, said side walls including spaced apart upright posts, an outer skin secured exteriorly to said posts and upper liner panels and lower liner panels secured interiorly to said posts, said lower liner panels being of thicker gauge material than said upper liner panels, said side walls including foam in-place insulation between said outer skin and said upper and said lower panels, each said upper and each said lower liner panels being substantially rectangular, said upper liner panels each having a plurality of spaced apart vertically disposed ribs and depressions, said lower liner panels including a plurality of like-spaced ribs and depressions vertically aligned with those of the upper liner panels, said lower liner panels and having a top marginal edge portion overlapping the lower marginal edge portion of said upper liner panels, each said lower liner panel including a reinforcing trough portion extending parallel and adjacent to said top marginal edge portion between adjacent posts and transverse to said vertically disposed ribs and depressions, said trough portion serving to prevent buckling between said upper and lower panels.