Module and modular support for turfgrass and like areas

A module for complementary interfitting interlocked engagement with adjacent like modules adapted to be embedded in the surface of a turfgrass area to form a modular supporting structure for traffic over said area, comprising an integral non-metallic one-piece unit of honeycomb-like cellular construction having a plane bottom wall adapted to rest upon and be supported by the subjacent turfgrass soil and a plurality of vertical wall portions of uniform height and thickness extending upwardly from said bottom wall and defining a plurality of rows of cells each containing a plurality of cells of uniform cross sectional area, each of said vertical wall portions being common to an adjacent pair of cells whereby each cell in each row is contiguous to the adjacent cell in said row and to adjacent cells in the next row thereof, all of said cells being open at the upper ends thereof in the top surface of the unit and partially closed at the lower ends thereof by the bottom wall of said unit, said bottom wall having a plurality of apertures therein each of less area than the cell cross-sectional area and arranged so that at least one aperture is located in the bottom wall of each cell for drainage and extension of turfgrass roots into the subjacent soil, each of said vertical wall portions having a recessed opening in the upper edge portion thereof providing cross-communication between each adjacent pair of cells for the lateral extension from cell to cell of turfgrass roots, stolens and rhizomes, the cells in each row being laterally offset with respect to the cells in the adjacent row and providing in the respectively opposite peripheral sides of the unit alternately disposed projecting portions and recesses arranged for complementary interfitting engagement with corresponding recesses and projecting portions of an adjacent unit, a plurality of selectively positioned interlock tabs projecting from each side of the unit, and means defining tab receiving openings selectively positioned in each side of said unit, said tabs and tab receiving openings being constructed and disposed for interlocking engagement with corresponding tab receiving openings and tabs of an adjacent unit.