DURUS trays are coated using the continuous hot dipped process prior to fabrication. During fabrication trays are punched, formed, and cut to length. Trays may also be cut to fit in the field or on site. All of these processes will leave exposed edges of uncoated steel. In terms of cathodic protection offered by a galvanized coating of adequate thickness to a bare area, the two most important variables are the width of the bare area and the electrolyte that connects the galvanized coating and bare area. Due to the variability in electrolyte properties, it is hard to give exact widths of bare areas on galvanized steel that will be cathodically protected, but various studies have found in atmospheric exposure in urban environments, bare areas up to 2 millimeters in width will be completely protected. DURUS trays are made of 20-gauge steel and should be well within the estimated cathodically protected area.