Replaceable wet-set tactile warning surface unit and method of installation and replacement

Abstract

A replaceable, wet-set tactile warning surface unit having a body defining an upper surface and a lower surface, the body defining a series of raised projections on its upper surface, and defining a plurality of spaced through-holes from the top to the bottom surface, in which the raised projections are spaced from one another and the through-holes are located between projections. An anchor member such as a threaded insert is coupled to the bottom surface of the unit member directly below each of the through-holes by fasteners such as bolts that pass through the through-holes.

1 . A replaceable, wet-set tactile warning surface unit, comprising: a unitary resinous composite body defining an upper surface and a lower surface, the body comprising a series of raised projections on its upper surface, a plurality of projecting asperities disposed on the upper surface and on the top of the raised projections, and a plurality of spaced through-holes passing through the body; anchor members coupled to the unit below the through-holes by fasteners that pass through the through-holes; a flange extending from the lower surface at or near each side of the unit; and an unenclosed vent along each of the sides and located underneath the body that allows air to escape from underneath the unit when it is installed in fresh concrete and that prevents the body from being permanently embedded in set concrete. 
     
     
         2 . The replaceable, wet-set tactile warning surface unit of  claim 1 , wherein the number of spaced through holes equals the number of anchor members.