Permitted floodproofing systems shall conform to the conditions listed below and the floodproofing standards listed in subsection 14-5-6E of this title for commercial and industrial buildings:
A. Electrical Systems: All electrical service materials, equipment and installation for uses in a regulated flood hazard area must be certified to meet the following requirements:
1. All incoming power service equipment, including all metering equipment, control centers, transformers, distribution and lighting panels, and all other stationary equipment must be located at least two feet (2') above the base flood elevation;
2. Portable and movable electrical equipment may be placed below the base flood elevation, provided that the equipment can be disconnected by a single plug and socket assembly of the submersible type;
3. The main power service lines must have automatically operated electrical disconnect equipment or manually operated electrical disconnect equipment located at an accessible remote location outside the regulated flood hazard area or two feet (2') above the base flood elevation; and
4. All electrical wiring systems installed below the base flood elevation shall be suitable for continuous submergence and may not contain fibrous components.
B. Heating And Cooling Systems: All heating and cooling systems for uses in the regulated flood hazard area must be certified to meet the following requirements:
1. Float operated automatic control valves must be installed so that fuel supply is automatically shut off when floodwaters reach the floor level where the heating and cooling systems are located;
2. Manually operated gate valves must be installed in gas supply lines. The gate valves must be operable from a location above the base flood elevation;
3. Electric systems must be installed in accordance with the provisions of subsection A of this section; and
4. Furnaces and cooling units must be installed at least two feet (2') above the base flood elevation and the ductwork installed above the base flood elevation.
C. Plumbing Systems: All plumbing systems for uses in the regulated flood hazard area must be certified to meet the following requirements:
1. Sewer lines, except those to a buried and sealed vault, must have check valves installed to prevent sewage backup into permitted structures; and
2. All toilets, stools, sinks, urinals, vaults, and drains must be located so the lowest point of possible floodwater entry is at least two feet (2') above the base flood elevation.
D. Wet Floodproofing: Building designs with an enclosure below the lowest floor must be certified to meet the following:
1. Materials used for walls and floors are resistant to flooding to an elevation two feet (2') or more above the base flood elevation;
2. The enclosure must be designed to equalize hydrostatic forces on walls by allowing for entry and exit of floodwaters. Opening designs must either be certified by an engineer or architect or meet or exceed the following:
a. Automatically allow entry and exit of floodwaters through screens, louvers, valves, and other coverings or devices;
b. Have two (2) or more openings with a total net area of not less than one square inch for every one square foot of enclosed area below the lowest floor, except if the enclosure is partially subgrade, a minimum of two (2) openings may be provided on a single wall; and
c. Have the bottom of all openings no higher than one foot (1') above the higher of the exterior or interior adjacent grade or floor immediately below the openings.
E. Dry Floodproofing: Building designs that do not allow internal flooding must be certified according to these regulations to meet the following:
1. Building use must be for nonresidential use only and does not include mixed residential and nonresidential use;
2. Be floodproofed to an elevation no lower than two feet (2') above the base flood elevation;
3. Be constructed of impermeable membranes or materials for floors and walls and have watertight enclosures for all windows, doors, and other openings; and
4. Be designed to withstand the hydrostatic pressures and hydrodynamic forces resulting from the base flood and the effects of buoyancy. (Ord. 15-16, 10-5-2015)