Crib block and structure

Claim 1

A structural unit for use in the construction of cribbing, retaining walls and the like with other similar units in a stacked relationship, each unit comprising two massive, rigid, laterally spaced side panels disposed extending axially parallel to each other, the panels defining a space therebetween open at opposite ends of the panels, a massive rigid connecting arm of lesser height than the panels disposed extending between opposed inner surfaces of the side panels and integral therewith holding the two side panels in relative fixed positions, said panels and said arm each have a generally trapezoidal cross section, and having opposite sides, including an inner side diverging inwardly in a direction toward a lower end of said unit, interlock means extending downwardly on lower edges of said unit for extending downwardly adjacent upper marginal surfaces of an upper edge of the panels of an immediately underlying structural panel for thereby interlocking two of the structural units when superposed, said interlock means comprising a downwardly extending portion of said connecting arm extending downwardly below a lower surface of each panel, and comprising a lip on each panel extending downwardly from the inner surface of the corresponding panel, said lip being disposed for extending downwardly adjacent an upper inner marginal surface of an upper edge of a panel of an immediately underlying structural panel thereby interlocking the structural units.