Patent ID: 7779602

Claim:
A method of placing a floor structure, comprising: a. interlocking contrapositive members of at least two floor structure units, the floor structure units comprising: i. a tray, further comprising: 1. an upper horizontal surface; 2. a lower horizontal surface; 3. at least one retaining wall extending vertically from either of the horizontal surfaces; 4. a first set of interlocking members; and 5. a second set of interlocking members, wherein the first set and the second set are contrapositive, ii. a flooring material disposed on the upper horizontal surface of the tray such that the first set of interlocking members is substantially flush with the flooring material and the second set of interlocking members extends beyond the flooring material; iii. a rubber matrix disposed in the lower horizontal surface of the tray; and iv. a rubber grommet disposed about the perimeter of the at least one retaining wall of the tray, wherein the rubber grommet and the rubber matrix are connected to form a unitary structure in the floor structure unit.