All new construction and substantial improvements of nonresidential structures within zones A1-30 on the city's FIRM shall have the lowest floor, including basement, elevated to or above the base flood level or, together with attendant utility and sanitary facilities, be designed so that below the base flood level the structure is watertight with walls substantially impermeable to the passage of water and with structural components having the capability of resisting hydrostatic and hydrodynamic loads and the effects of buoyancy.
(1993 Code, § 82-317) (Ord. passed 10-12-1992)