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F101.6 Pier and Wood Construction
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Where an apron is provided, the apron shall be not less than 8 inches (203 mm) above, nor less than 24 inches (610 mm) below, grade. The apron shall not terminate below the lower edge of the siding material. The apron shall be constructed of an approved nondecayable, water-resistant rodentproofing material of required strength and shall be installed around the entire perimeter of the building. Where constructed of masonry or concrete materials, the apron shall be not less than 4 inches (102 mm) in thickness.
Where continuous concretegrade floor slabs are provided, open spaces shall not be left between the slab and walls, and openings in the slab shall be protected.
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:
- Section F184.108.40.206 or F220.127.116.11.
- By installing solid sheet metal collars at least 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.
- By encasing the pipes, cables, conduits or wires in an enclosure constructed in accordance with Section F18.104.22.168.
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