(a) Foundations and foundation walls shall be designed to withstand all vertical and horizontal loads.
(b) Where foundations are supported at different levels, or at different levels from foundations of adjacent structures, the effect of such differences in foundation levels shall be considered in the design.
(c) Footings shall not be less than four inches wider than the foundation walls, and not less than eight inches in thickness, constructed of concrete. The bottom of all footings shall be not less than three feet, six inches below the finished exterior grade at every point. Where foundation walls rest upon natural rock or shale, footings may be omitted at the discretion of the Building Inspector.
(d) Foundation walls for solid wall construction shall be of brick, concrete, concrete block or stone. When built of brick, concrete block or coursed stone, they shall be at least twelve inches thick where the enclosed area is used as a basement or cellar, but may be eight inches thick when the enclosed area is not excavated. In the latter case the foundation walls shall be included in the allowable height of eight-inch walls. When built of concrete poured in place, they shall be at least as thick as the walls they support, but in no case less than sixteen inches thick.
(e) Foundation walls supporting hollow concrete block, hollow walls of brick or frame construction may be of brick, concrete, concrete block, stone or vitrified or saltglazed tile. Foundation walls shall be not less than twelve inches thick.
(f) Foundation walls for frame construction shall extend at least eight inches above the finished exterior grade at every point.
(g) Cross ventilation shall be provided for the space enclosed by foundation walls, when there is a crawl space formed.
(h) All exterior foundation walls enclosing a basement shall be waterproofed as follows: Apply a one-half inch coat of cement plaster and over this apply two coats of approved waterproofing material (asphalt or ironite type). On the exterior of these walls, gravel backfill shall be brought up to within twelve inches of grade.
(Ord. 1992-101. Passed 1-14-92.)