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(a) All foundation wall ventilator openings shall be covered for their entire height and width with perforated sheet metal plates of a thickness not less than 18 gauge, or with expanded sheet metal of a thickness of not less than 18 gauge, or with cast iron grills or grates, or with any other material of sufficient strength and equal rat-resisting properties. The openings herein shall be small enough to prevent the ingress or egress of rats, and in no instance shall be larger than one-half inch.
(b) All foundation, exterior wall and roof openings, excluding doors, windows and those openings used for the purpose of ventilation and light, such as those openings around pipes, electric cables, conduits, openings due to deterioration or damage, broken masonry or concrete, or other openings which may allow the ingress or egress of rats, shall be protected by closing such openings with cement mortar, concrete or masonry, or close-fitting sheet metal, or suitable size pipe flanges, or other material with equal rat-resisting properties, which shall be securely fastened in place.
(1964 Code, § 19-357)
(a) All exposed edges of the lower six inches or more, if necessary, of wooden doors and door jambs serving as front, rear or side entrances into business buildings from the ground, basement or cellar floors, and other doors accessible to rats, shall be protected, if necessary, against the gnawing of rats by covering such doors and jambs with solid sheet metal of not less than 24 gauge thickness. The same material shall be used on doorsills or thresholds, or such doorsills or thresholds may be constructed of cement, stone, steel or cast iron.
(b) Doors, door jambs and sills of coal chutes and hatchways that are constructed of wood shall be covered with solid sheet metal of 24 gauge or heavier, or they may be replaced with metal chutes of 24 gauge or heavier, installed in such manner as will prevent the ingress or egress of rats.
(c) All doors on which metal flashing has been applied shall be properly hinged to provide for free swinging. When closed, doors shall fit snugly so that the maximum clearance between any door, door jambs and sills shall not be greater than three-eighths of an inch.
(d) Door jambs and sills constructed of metal, concrete, masonry, stone or cement mortar, or cast iron and steel, when fitting closely to exclude rats, are not required to comply with this provision.
(1964 Code, § 19-358)
(a) All windows and other openings for the purpose of light or ventilation, located within 30 inches above the existing ground or roof level immediately below such openings, shall be covered, if necessary, for their entire height and width, including frames, with wire cloth of 19 gauge or heavier, having a mesh of not larger than one-half inch.
(b) All windows and other openings for the purpose of light or ventilation in the exterior walls, which may be accessible to rats by way of exposed pipes, wires, conduits and other appurtenances shall be covered with guards of wire cloth of 19 gauge or heavier, having a mesh of not larger than one-half inch, or, in lieu of wire cloth covering, such pipes, wire, conduits and other appurtenances shall be blocked from rat usage by installing sheet metal guards as provided in the following section.
(1964 Code, § 19-359)
(a) Poles, wires, conduits and other appurtenances which may cause openings to be accessible to rats shall be blocked from rat usage, where such openings are not ratproofed as provided in the preceding section, by installing sheet metal guards of 24 gauge or heavier.
(b) Such guards, when used on horizontal pipes, wires, conduits or other appurtenances, shall be placed in a vertical position and shall be snugly fitted around the pipe, wire, conduit or other appurtenances. Such guard shall measure not less than 12 inches beyond and on all sides of the pipe, wire, conduit or other appurtenances where the intervening space between the wall and pipe permits, and shall extend 30 inches in an upward direction and 12 inches in a downward direction, and shall be securely fastened to the pipe, wire, conduit or other appurtenance and also to the adjacent wall wherever practicable, so that the guard will remain in a vertical position at all times.
(c) Such guards, when used on vertical pipes, wires, conduits or other appurtenances, shall be fitted snugly around the pipe, wire, conduit or other appurtenance, shall be placed in a horizontal position at a right angle thereto, and shall extend horizontally from the pipe, wire, conduit or other appurtenance for a minimum distance of 12 inches beyond and on all sides of the pipe, wire, conduit or other appurtenance where the intervening space between pipe and wall permits, and shall be securely fastened to the pipe, wire, conduit or other appurtenance and also to the adjacent wall wherever practicable, in such manner that the guard will remain in a horizontal position at all times.
(1964 Code, § 19-360)
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