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(a) Business buildings constructed on piers having wooden floors with sills less than 18 inches above the surface of the ground shall have the intervening space between the floor sill and the ground protected against the ingress or egress of rats by installing a solid masonry or concrete wall not less than four inches thick or solid sheet metal curtain wall of 18 gauge or heavier around the entire perimeter of the business building, extending such curtain wall to a depth of not less than 18 inches below the surface of the ground level and extending outward laterally a distance of 12 inches from bottom of the curtain wall and fastening securely such curtain wall to the outside of the building with 24 gauge sheet metal in such manner as will prevent rats from entering the building.
(b) Business buildings constructed on piers having the lower surface of wooden floor sills more than 12 inches above the ground level shall have the intervening spaces between the floor sill and the ground protected against the ingress or egress of rats by installing curtain walls in accordance with the preceding subsection (a) above, or by protecting such business buildings against the ingress or egress of rats as provided in § 16-383.
(c) In lieu of the installation of curtain walls, all ground floors of wood construction may be replaced with concrete of not less than three inches in thickness, with the exterior walls protected for a height of 24 inches above the concrete floor with masonry, concrete or solid sheet metal of 24 gauge or heavier. Such exterior wall protection shall be securely tied into the concrete floor at all points.
(1964 Code, § 19-362)
In business buildings constructed on piers having wooden floor sills greater than 18 inches above the ground level, solid sheet metal coverage of 24 gauge or heavier may be installed snugly around each pipe, cable, wire, conduit or other utility service passing through wooden ground floor in lieu of curtain walls. The diameter of such metal coverage shall not be less than eight inches larger than the diameter of pipe, cable, wire, conduit or other utility service, and shall be securely fastened to the wooden floor. All other openings in wooden ground floors through which rats may gain entrance into double walls or the interior of business buildings, such as openings that may exist in floors and double walls above floor sills, shall be closed with 24 gauge or heavier solid sheet metal or 16 gauge or heavier wire cloth of one-half inch mesh, or with concrete or masonry. The intervening space between the ground and the floor sill shall be kept clean and clear. If the distance from the top of the floor sill to the under surface of a wooden floor is less than 18 inches, rat-stoppage treatment, as provided in other sections of this article, shall be used.
(1964 Code, § 19-363)
Wood frame constructed business buildings having concrete or masonry foundation walls shall have ventilators in foundation walls protected as provided in § 16-377. All miscellaneous wall openings, doors and windows shall be protected in accordance with this article.
(1964 Code, § 19-364)
In addition to the other provisions of this article relative to the protection of business buildings, the building shall be further protected by compliance with the following provisions.
(a) Leaning objects against buildings. No person in custody of such business building shall permit any fishing poles, ladders or other objects to lean against the side or wall of such business building in such manner that rats could climb on and reach any part of the structure or roof.
(b) Elevator shafts, etc. The person in custody of a business building shall also protect elevator shafts, fire escapes and guy wires in such manner that rats will not be able to gain ingress into such business buildings.
(c) Adjacent trees and limbs. It shall be the duty of any person in custody of a business building to trim the branches of all trees extending over, against or near any business building, and the same shall be cut and trimmed and kept cut and trimmed so that no part of any branch or any part of such tree shall be closer than ten feet to any business building, and the tops of all trees shall be cut back ten feet from the line extending perpendicularly from any exterior wall of a business building.
(1964 Code, § 19-365)
Curb or farmers markets in which fruit or vegetables or any other food products are exposed and offered for sale on racks, stands, platforms and in vehicles outside of business buildings shall have floors paved with concrete, asphalt or other similar material for the entire surface area of the market. Display racks, stands or platforms on which fruits or vegetables or any other food products are displayed or offered for sale shall be of sufficient height so that all such fruits, vegetables or other food products shall be kept at a distance of not less than 18 inches above the floor pavement, and shall be so constructed that rats cannot harbor therein or thereunder.
(1964 Code, § 19-366)
For the purpose of eliminating all rats that may remain in or gain access to any business building after rat stoppage shall have been carried into effect, all storerooms, warehouses or other business buildings in the city shall be provided with rat traps, which shall be properly set and maintained in good working order at all times by persons in custody of such business buildings.
(1964 Code, § 19-368)
No person shall permit to accumulate on any premises, improved or unimproved, on which evidence of rat infestation is found, or any lots or alleys adjacent to such property, any lumber, boxes, barrels, bricks, stones or any other character of materials that may be used as a harborage for rats unless the same shall be placed on open racks and elevated not less than 18 inches above the ground, with a clear intervening space underneath.
(1964 Code, § 19-370)
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