Ordinance 3766-20 - Laserfiche WebLink

greater. Mechanical equipment and utilities shall be waterproofed or elevated least one foot above the BFE, or as required by ASCE 24,whichever is greater. ii. If located in an Unnumbered A zone for which a BFE is not available and cannot be reasonably obtained,the structure shall be reasonably safe from flooding, but in all cases the lowest floor shall be at least two feet above the Highest Adjacent Grade. iii. If located in a V,V1-30,or VE zone,the structure shall meet the requirements in 19.30.300. iv. Fully enclosed areas below the lowest floor that are subject to flooding are prohibited, or shall be designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwaters. Designs for meeting this requirement must either be certified by a registered professional engineer or architect or must meet or exceed the following minimum criteria: (A) Have a minimum of two openings with a total net area of not less than one square inch for every square foot of enclosed area subject to flooding. (B)The bottom of all openings shall be no higher than one foot above grade. (C)Openings may be equipped with screens, louvers,valves, or other coverings or devices provided that they permit the automatic entry and exit of floodwater. (D)A garage attached to a residential structure,constructed with the garage floor slab below the BFE, must be designed to allow for the automatic entry and exit of flood waters. Alternatively, a registered engineer or architect may design and certify engineered openings. b) If the requirements of subsection B.2.a.above are not met,then new construction and substantial improvement of any commercial,industrial or other nonresidential structure shall meet all of the following requirements: i. Be dry floodproofed so that below one foot or more above the base flood level the structure is watertight with walls substantially impermeable to the passage of water or dry floodproofed to the elevation required by ASCE 24,whichever is greater; ii. Have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy; iii. Be certified by a registered professional engineer or architect that the design and methods of construction are in accordance with accepted standards of practice for meeting provisions of this subsection based on their development and/or review of the structural design,specifications and plans.Such certifications shall be provided to the official as set forth in Section 19.30.080.C.3.b; iv. Nonresidential structures that are elevated, not floodproofed, must meet the same standards for space below the lowest floor as described in Section 19.090.B.1.e; 3. Manufactured Homes.All manufactured homes to be placed or substantially improved on sites shall be elevated on a permanent foundation such that the lowest floor of the manufactured home is elevated one foot or more above the base flood elevation and be securely anchored to an adequately anchored foundation system to resist flotation,collapse and lateral movement. 4. Recreational Vehicles. Recreational vehicles placed on sites are required to: a) Be fully licensed and ready for highway use,on wheels or jacking system,attached to the site only by quick disconnect type utilities and security devices,and have no permanently attached additions;and b) Comply with Title 17. 5. Enclosed Area Below the Lowest Floor. If buildings or manufactured homes are constructed or substantially improved with fully enclosed areas below the lowest floor,the areas shall be used solely for parking of vehicles, building access,or storage. 6. Appurtenant Structures(Detached Garages&Small Storage Structures). For A Zones(A,AE,A1-30,AH, AO): 14