Patent ID: 7993074

Claim:
In combination with a walking surface; comprising: a tactile warning panel having an upper surface and a lower surface; a plurality of spaced-apart tactile warning protrusions extending upwardly from said upper surface of said panel; a plurality of apertures formed in said panel between said tactile warning protrusions; a plurality of loose fasteners; a loose fastener positioned in each of said apertures which secure said panel to the walking surface; said lower surface of said panel being completely embedded into the walking surface; each of said fasteners having a head portion and a body portion extending downwardly therefrom; said body portion of each of said fasteners having a diameter which is less than the diameter of said head portion thereof; each of said head portions of said fasteners having an upper end and a lower end; said lower end of said head portion of each of said fasteners having a diameter greater than the associated aperture so that said lower end of said head portion is in engagement with said upper surface of said panel; said body portions of said fasteners extending downwardly through said apertures into the walking surface to anchor the fastener to the walking surface; said lower ends of said head portions of said fasteners being held in engagement with the upper surface of said panel only by the anchoring of the fasteners to the walking surface; said head portions of said fasteners having the same configuration as said tactile warning protrusions and having the same height and diameter as said tactile warning protrusions so that said head portions of said fasteners also function as tactile warning protrusions; said upper surface of said panel being continuous and devoid of any other openings therein except for said apertures having loose fasteners therein.