The following sections and subsections of the Uniform Building Code are hereby amended or deleted as set forth, and additional sections and subsections are added as indicated. Subsequent section numbers used in this subchapter shall refer to the like numbered sections of the Uniform Building Code. After § 2907 a new § 2907.1 is added to read as follows:
Section 2907.1.
(a) Frost line: Frost line shall in all cases be three feet and six inches below the adjacent grade.
(b) Accessory buildings: Detached accessory buildings, one story in height and wood frame constructed over 145 square feet in area but less than 1,000 square feet which are not used for human occupancy may be supported on foundations which extend from a point at least 12 inches below grade to a point at least six inches above grade. All detached accessory buildings with 145 square feet or less whether wood or metal frame construction may be supported on a four-inch slab only.
(c) Subsoil drainage: The ground around all buildings shall be so graded as to provide drainage away from the foundation walls and to prevent dampness due to seepage through the ground. In buildings and structures without basements, the enclosed portion beneath the floor or crawl space shall be at the same or higher elevation than the immediate exterior grade except a complete system of four-inch subsoil drain tile or other drainage system approved by the Building Official shall encircle the footings of exterior basement and cellar walls. The top half of the drain tile joint shall be covered with strips of buildings paper, and the drain tile shall be covered with 12 inches of gravel or stones. The subsoil drain may discharge into storm sewers or other established drains.
(d) Foundation wall damp-proofing and water-proofing; Foundation walls shall be so designed and constructed as to be adequately protected at all points against penetration of moisture by the application of undiluted hot tar, hot asphalt or a compound or system approved by the Building Official.
(1991 Code, § 8.4)