(a) Except as specified in section 271-7.2 of this Subpart, floors and floor coverings of all food preparation, food storage and warewashing areas, and the floors of all walk-in refrigerators, dressing rooms, locker rooms, toilet rooms and vestibules shall be constructed of smooth durable material such as sealed concrete, terrazzo, quarry tile, ceramic tile, durable grades of vinyl asbestos or plastic tile or tight-fitting wood impregnated with plastic, and shall be maintained in good repair. Nothing in this section shall prohibit the use of anti-slip floor covering in areas where necessary for safety reasons.

(b) Floors which are water-flushed, or which receive discharges of water or other fluid wastes or are in areas where pressure spray methods for cleaning are used shall be provided with properly installed trapped drains. Such floors shall be constructed only of sealed concrete, terrazzo, quarry tile, ceramic tile or similar materials, and shall be graded to drain.

(c) In all establishments utilizing concrete, terrazzo, quarry tile, ceramic tile or similar flooring materials, or where water-flush cleaning methods are used, the junctures between walls and floors shall be covered and sealed. In all other cases, the juncture between walls and floors shall be covered so as not to present an open seam of more than ¹/₃₂ inch.