Abstract: The disclosure is directed to a built-up granular structure having a stable moisture content controlled upper layer. The preferred granular structure includes an improved fine aggregate upper surface layer, a coarse aggregate reservoir layer having a topmost application of perforate adhesive material, and a dry moisture barrier layer having a topmost impervious layer. The entire layered structure is supported by any firm base including compacted soil or an existing playing court structure. A containment wall having screened drainage inlets/outlets surrounds the periphery of the structure.
Type:
Grant
Filed:
August 28, 1989
Date of Patent:
April 9, 1991
Assignee:
Burco, Inc.
Inventors:
Herman F. Burkstaller, Emmet F. Brieger