APPENDIX F
RODENTPROOFING
SECTION F101
GENERAL
F101.1 General.
Buildings or structures and the walls enclosing habitable or occupiable rooms and spaces in whichpersons live, sleep or work, or in which feed, food or foodstuffs are stored, prepared, processed, served or sold, shall be constructed in accordance with the provisions of this section.
F101.2 Foundation wall ventilation openings.
Foundation wall ventilation openings shall be covered for their height and width with perforated sheet metal plates not less than 0.070 inch (1.8 mm) thick, expanded sheet metal plates not lessthan 0.047 inch (1.2 mm) thick, cast-iron grills or grating, extruded aluminum load-bearing vents or with hardware cloth of 0.035 inch (0.89 mm) wire or heavier. The openings therein shall not exceed 1/4 inch (6.4 mm).
F101.3 Foundation and exterior wall sealing.
Annular spaces around pipes, electric cables, conduits or other openings in the walls shall be protected against the passage of rodents by closing such openings with cement mortar, concrete masonry or noncorrosive metal.
F101.4 Doors.
Doors on which metal protection has been applied shall be hinged so as to be free swinging. Whenclosed, the maximum clearance between any door, door jambs and sills shall be not greater than 3/8 inch (9.5 mm).
F101.5 Windows and other openings.
Windows and other openings for the purpose of light or ventilation located in exterior walls within 2 feet (610 mm) above the existing ground level immediately below such opening shall be covered for their entire height and width, including frame, with hardware cloth of not less than 0.035-inch (0.89 mm) wire or heavier.
F101.5.1 Rodent-accessible openings.
Windows and other openings for the purpose of light and ventilation in the exterior walls not covered in this chapter, accessible to rodents by way of exposed pipes, wires, conduits and other appurtenances, shall be covered with wire cloth of at least 0.035-inch (0.89 mm) wire. In lieu of wire cloth covering, said pipes, wires, conduits and other appurtenances shall be blocked from rodent usage by installing solid sheet metal guards 0.024 inch (0.61 mm) thick or heavier. Guards shall be fitted around pipes, wires, conduits or other appurtenances. In addition, they shall be fastened securely to and shall extend perpendicularly from the exterior wall for not less than 12 inches (305 mm) beyond and on either side of pipes, wires, conduits or appurtenances.
F101.6 Pier and wood construction.
F101.6.1 Sill less than 12 inches above ground.
F101.6.1.1 Apron.
F101.6.1.2 Grade floors.
F101.6.2 Sill at or above 12 inches above ground.
Buildings not provided with a continuous foundation and that have sills 12 inches (305 mm) or more above ground level shall be provided with protection against rodents at grade in accordance with any of the following:
2.By installing solid sheet metal collars not less than 0.024 inch (0.6 mm) thick at the top of each pier or pile and around each pipe, cable, conduit, wire or other item that provides a continuous pathway from the ground to the floor.
3.By encasing the pipes, cables, conduits or wires in an enclosure constructed in accordance with Section F101.6.1.1.