Agenda - 02-23-1987 - Laserfiche WebLink

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083 89 3. • 2. Mechanical and Utility Equipment. You must have a provision in- your ordinance that specifically requires mechanical and utility equipment to be elevated above the base flood elevation or designed so as to prevent water from entering or accumulat- ing within the equipment components [see S60.3(a) (iv)) . You may meet this requirement by demonstrating that your current ordinance already contains such a provision or by incorporating the following or its equivalent into your ordinance:- Electrical, heating, ventilation. plumbing, and air-conditioning equipment and other ` service facilities shall be designed -and/or located so as to prevent water from entering • or accumulating within the components during . conditions of flooding. • 3. Definition of Start of Construction. The final rule modifies the definition of "start of construction" to eliminate incon- sistencies in treatment between pile and column structures and other types of foundations and to incorporate the -"manufactured home" revisions. You must replace your definition, "start of construction," with the definition in the final rule. 4. Use of Openings in Enclosures Below a Structure's Lowest Floor. The final rule adds a provision which requires that fully enclosed 'areas below the base flood elevation be designed to allow for the automatic entry and exit of floodwaters -to equalize hydrostatic flood forces [see S60.3(c) (5)1 . You can .comply with this requirement by prohibiting the enclosure of areas below the base flood elevation or by incorporating the following provision or its equivalent into your ordinance: For all new construction and substantial improve- ments, fully enclosed areas below the lowest floor that are subject to flooding 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 minimum of two openings having a total net area of not less than one square inch for every square foot of enclosed area subject to flooding shall be pro- vided. The bottom of all openings shall be no higher than one foot above grade. Openings may be equipped with screens, louvers, or other coverings or devices provided that they permit the automatic entry and exit of floodwaters.