US Patent 11015316 Top plate for cribbing stacks and associated methods

A plate for cribbing stacks having a top surface and a bottom surface, first, second, third, and fourth side surfaces connecting the top and bottom surfaces; a first level attached to the first side surface; and a second level attached to the second side surface, the first and second side surfaces being in a non-parallel relationship; and wherein the top and bottom surfaces and the first, second, third, and fourth side surfaces are arranged so that the first and second levels indicate when the plate is horizontal.