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HomeMy WebLinkAbout1991-13119191(ORD1)Legal(Ob): AN ORDINANCE OF INDIAN RIVER COUNTY, FLORIDA ESTABLISHING CHAPTER 402 - COASTAL CONSTRUCTION CODE OF TITLE IV, PROVIDING REPEAL; PROVIDING ;,$,EVERABIL- ITY; AND PROVIDING AN EFFECTIVE DATE. BE IT ORDAINED by the Board of County Commissioners of Indian River County, thaf: SECTION I. COASTAL CONSTRUCTION CODE. Chapter 402 - o sa tal Construction Codes^Tit-le IV as set forth in Attachment A to this ordinance is hereby adopted. SECTION 2. RFPFAL_ Those portions of the Indian River County Code (1974 edition) superseded or in conflict,.with the provisions herein adopted, in particular Chapter 4, are hereby repealed. SECTION 3. SEVERABILITY, If any section, or if any sentence, paragraph, phrase, or word of this ordinance is for any reason held to be unconstitutional, inoperative, or void, such holding shall not affect the remaining portions of this ordinance, and it shall be construed to have been the legislative intent to pass the ordinance without such unconstitutional, -i-nva I i-d—ori n ode -rat -f ve— pa -r t . SECTION 4. EFFECTIVE_ DATE. This ordinance shall become effective upon becoming law. Approved and adopted by the Board of County Commissioners of Indian River County, Florida, on this 26 day of _ Ma_rch--- 1 1991. SmeadSoft Reprint Date: Tuesday, August 20, 2013 - 12:05:35 - OfficialDocuments:611, Attachment Id 0, Page 1 This ordinance was advertised in the Vero Beach Press -Journal on the 7 day of March 1991, for a public hearing to be held on the 26 day of March 1991, at which time it was moved for adoption by Commissioner Wheeler seconded by Commissioner Eggert and adopted by the following vote: Vice Chairman Gary C. Wheeler Aye Commissioner Don C. Scurlock, Jr. Aye. Commissioner Margaret C. Bowman Aye. Commissioner Carolyn K. Eggert Aye BOARD OF COUNTY COMMISSIONERS INDIAN RIVER COUNTY, FLORIDA, B� _ __✓l CF—aiirman Attest By J ez fret' K Nrt;o, C;IerkQi Acknowlectgment by tiie Department crf—State of t•tie State:"of Florida, this list day of _April 1991x'`" Effective date: Acknowledgment from the Department of State received on this 8th day of _AEril 1991, at 9:30 a.m./p.m. and filed Fn the Office of .tie Clerk of the Board oT County Commissioners of Indian River County, Florida. indm Rive U Approved Date Admin ee Legal 6 Budget Risk Mgr. SmeadSoft Reprint Date: Tuesday, August 20, 2013 - 12:05:35 - OfficialDocument5:611, Attachment Id 0, Page 2 CHAPTER 402 COASTAL CONSTRUCTION CODE Section 402.01 Title Section 402.02 General Section 402.03 Applicability Section 402.04 Coastal building zone boundary description Section d02rn5 Existing structures Section 402.06 Multizone structures Section 402.07 Construction seaward of mean high water Section 402.08 Application for permit Section 402.09 Definitions Section 402.10 Coastal construction requirements Section 402.11 Structural requirements for major structures Section 402.12 Structural requirements for nonhabitable major structures Section 402.13 Structural requirement for minor structures Section 402.14 Location of construction Section 402.15 Public access Section 402.16 References Section 402.01 Title The provisions contained herein shall constitute the Coastal Construction Code for construction within the coastal building zone in In ianRiver County and shall be referred o as 'coastal code." Section 402.02 General The purpose of the coastal code is to provide minimum standards for the design and construction of buildings and structures other than coastal protective structures, to reduce the harmful effects of hurricanes and other natural disasters occurring along the coastal areas of Indian River County. The coastal code is site specific to the coastal building zone as defined herein and is not applicable to other locations. In the event of a conflict between this article and other articles or chapters of this Code, the requirements resulting in more restrictive design shall apply. P:o provisions in this article shall be construed to permit any construction in any area prohibited by local city, county, or state regulation. Section 402.03 Applicability The requirements of this coastal code shall apply to the following types of construction in the coastal building zone in Indian River County: (11—The new construction of, or improvement—to, major structures, nonhabitable major structures, and minor structures as defined herein. Coastal protective SmeadSoft Reprint Date: Tuesday, August 20, 2013 - 12:05:35 - OfficialDocuments:611, Attachment Id 0, Page 3 (2) structures such as seawalls or revetments are exempt from this article. The coastal code does not apply to minor work in the nature of normal beach cleaning or debris removal. Section 402.04 Coastal building zone boundary description The boundary of the coastal building zone on the coastal barrier island shall be the land area from the seasonal high-water line to a line five thousand (5,000) feet landward from the coastal construction control line as established and as may be amended from time to time pursuant to Section 161.053, Florida Statutes, or the entire island, whichever is less. If no coastal construction control line is in place, the coastal building zone shall be the land area seaward of the most landward velocity zone (V zone) boundary line fronting upon the Atlantic Ocean. Provided, however, that in the event the Land and Water Adjudicatory Commission reduces the size of the coastal building zone then the Land and Water Adjudicatory Commission's decision shall prevail only as to the area addressed by such decision. Section 402.05 Existi-ng-structures The requirements of this chapter shall not apply to existing structures, s� tures underconstruction, or structures for which a valid and unexpired building permit was issued prior to the adoption of the coastal code. Section 402.06 Multizone structures For structures requirements structure. located partially in the coastal building zone, the of the coastal code shall apply to the entire Section 402.07 Construction seaward of mean high water Structures or construction extending seaward of the mean high water line which are regulated by Section 161.041, Florida Statutes, (e.g., groins, jetties, moles, breakwaters, seawalls, revetments, beach nourishment, inlet dredging, etc.) are specifically exempt from the provisions of this chapter. In addition, the coastal code does not apply to piers, pipelines, or outfalls which are regulated pursuant to the provisions of Section 161.053, Florida Statutes. Section 402.08 Application for permit Applications for building permits for all construction in the coastal building zone shall be certified by an architect or professional engineer registered in the State of Florida except single-family residences and accessory structures of normal or usual design as determined by the building official. Such SmeadSoft Reprint Date: Tuesday, August 20, 2013 - 12:05:36 - OfficialDocuments:611, Attachment Id 0, Page 4 certification shall state that the design plans and specifications for the construction are in compliance with the criteria established by this Coastal Code. Section 402.09 Definitions The following owing terms are defined for general use in the coastal code: (a) Beach means the zone of unconsolidated material thaw extends landward from the mean low water line to the place where there is marked change in material or physiographic form, or to the line of permanent vegetation, usually the effective limit of storm waves. "Beach" is alternatively termed "shore;" (b) Breakaway building wall or frangible building wall means a partition independent of supporting structural members that will withstand design wind forces, but will fail under hydrostatic, wave, and runup forces associated with the design storm surge. Under such conditions, the wall shall fail in a manner such that it breaks up into components that w.i.1-1-mini-mize the—potent al for damage to life or adjacent property. c) Euing sup orp s ucture m s structure which supports floor, wall or column loads, and transmits them to the foundation. The terms shall include beans, grade beams, or joists, and includes the lowest horizonal structural member exclusive of piles, columns, or footings. (d) Coastal barrier island means a completely surrounded by marine Atlantic Ocean. geological feature is waters and fronts the Column action means the potential elastic instability in piles or columns resulting in axial or lateral bending of the member due to compressive stress. (f) Construction means the carrying out of any building, clearing, filling, or excavation or the substantial improvement in the size or use of any structure or the appearance of any land, other than coastal protective structures and beach fill/nourishment. When appropriate to the context, "construction" refers to the act of construction or the result of construction. (g) Design storm means the 100 -year storm event including a storm surge equivalent to the base flood elevation as determined by the Federal Emergency Management Agency. (h) Dune means a mound or ridge of loose sediment, usually 3 SmeadSoft Reprint Date: Tuesday, August 20, 2013 - 12:05:36 - OfficialDocuments:611, Attachment Id 0, Page 5 sand -sized, lying landward of the beach, and deposited by natural or artificial means. i) Major structure includes, but is not limited to, residential buildings including mobile homes, commercial, institutional, industrial, and other construction having the potential for substantial impart on coastal zonas, other than coastal protective structures. Mean high water line means the intersection of the tidal plane of mean high water with the shore. Mean high water is the average height of high water over a 19 -year period. (k) Minor structu a includes, butA-s- not -limited to; pile - supported, elevated dune beach walkover structures; beach access ramps and walkways; stairways; pile -supported elevated viewing platforms, gazebos; and boardwalks; lifeguard support stands; public and private bathhouses; sidewalks, driveways parking areas, shuffleboard courts, tennis courts, handball courts, racquetball courts, and other uncovered paved areas; earth retaining walls; sand fences, privacyfences,—ornamental walls -,ornamental garden structures, aviaries, and other ornamental construction. It shall be a characteristic of minor structures the e�onsi ere — to -be expandable under design wind, wave and storm forces. (1) Nonhabitable major structure includes, but is not limited to, swimming pools; parking garages; canals, lakes, ditches; water and sewage treatment plants electrical power plants; transmission and distribution lines, transformer pads, vaults, and substations; roads, bridges, streets, and highways; underground storage tanks; communications buildings and towers; flagpoles and signs over 15 feet in height. (m) NGVD means National Geodetic Vertical Datum - a geodetic datum established by the National Ocean Service and frequently referred to as the 1929 Mean Sea Level Datum. (n) Substantial improvements means any repair, reconstruction or improvement of a structure, the cost of which equals or exceeds a cumulative total of 50 per cent of the market value of the structure either: (1) Before the improvement or repairs is stated; or (2) If the structure has been damaged, and is being restored, before the damage occurred. SmeadSoft Reprint Date: Tuesday, August 20, 2013 - 12:05:36 - OfficialDocuments:611, Attachment Id 0, Page 6 For the purposes of this definition, "substantial improvement" is considered to occur when the first alteration of any wall, ceiling, floor, or other structural part of the building commences, whether or not the alteration affects the external dimensions of the structure. The term does not, however, include either any project for improvement of a structure to comply with existing state or local health, sanitary, or safety code specifications which are solely necessary to assure safe living conditions; or any alteration of a structure listed on the National Register of Historic Places of the State Inventory of Historic Places. Section 402.10 Coastal construction requirements Construction within the coastal building zone shall meet the requirements of this chapter. All structures shall be designed so as to minimize damage to life, property, and the natural environment. Assistance in determining the design parameters to minimize such damage maybe found in the reference documents listed in Section 402.16, entitled "References." Section 402.11 Structural requirements for major structures (1) Foundations: (a) Al mayor structures Tl nchorecrto their foundation in such a manner as to prevent flotation, collapse or lateral displacement. (b) Foundation design and construction of a major structure shall consider all anticipated loads resulting from a 100 -year storm event, including wave, hydrostatic, and hydrodynamic loads acting simultaneously with live and dead loads. Erosion computations for foundation design shall account for all vertical and lateral erosion and scour -production forces, including localized scour due to the presence of structural components. (2) Pole foundation shall be required for buildings located in federal emergency management agency flood insurance rate map "V" (velocity) zones. (a) Pile dimensions, spacing and embedment shall be designed consistent with the requirements of the site, taking into account all vertical, lateral, erosion and scour - producing forces. (b) Pile shall be driven to a penetration which achieves adequate bearing capacity taking into consideration the anticipated loss of soil above the design grade. (c) In addition to the normal foundation analysis, the pile SmeadSoft Reprint Date: Tuesday, August 20, 2013 - 12:05:36 - OfficialDocuments:611, Attachment Id 0, Page 7 foundation analysis shall consider piles in column action, where appropriate, from the bottom of the support or structure to the design grade. (d) Consideration shall also be given to the degree of exposure to wave attack and the resulting impact loads on lateral or diagonal bracing between piles. monolitnic iounaaLions may De permiLLea in ieaeral emergency management agency flood insurance rate map "A" or "B" zones. (a) Monolithic foundations may be used if soil conditions permit and if located at an elevation which minimizes their f f ect-on the -be pert es consideration shall be given to their vulnerability to erosion under design storm conditions. the event that a monolithi-c foundation is--used-,--t design scour depth (see Chapter 5.28, Shore Protection Manual, U.S. Corps of Engineers, 4th Edition, 1984) unless positive methods are provided to prevent scour. (4) Understructures. No substantial walls or partitions shall be constructed below the level of the first finished floor. This does not preclude the construction of: (a) Stairways; (b)Shearwalls essentially perpendicular to breaking waves; (c) Shearwalls essentially parallel to breaking waves which do not -meed a maximum f 20 per -the building (d) Wind or sand screens constructed of fabric or wire mesh; (e) Light open lattice partitions with individual wooden lattice strips no greater than 3/4 inches thick or 3 inches wide; (f) Elevator shafts; (g) Breakaway or frangible building walls; or (h) Substantial building walls constructed above the wave action and storm surge expected under design storm conditions. 6 SmeadSoft Reprint Date: Tuesday, August 20, 2013 - 12:05:37 - OfficialDocuments:611, Attachment Id 0, Page 8 (5) Building and floor elevations. The minimum elevation for the underside of the building support structure (excluding foundation) shall be above the elevation of the design breaking wave crests of wave uprush superimposed on the storm surge with dynamic wave setup shall be the elevation established by the base flood elevation for the specific area as established by the Federal Management Agency. (6) Erosion and design grade. The elevation of the soil surface to be used in the design of foundations, calculation of pile reactions, and bearing capacities shall not be greater than that which would result from the erosion reasonably anticipated as a result of design storm conditions. Calculation of the design grade shall take into account localized scour due to the presence of structural components. Erosion computations for foundation design shall consider all vertical and all lateral erosion and scour -producing forces. (7) Wave force design: (a) Calculations for wave forces resulting from design storm conditions on building foundations and superstructures may be—based upon—he m nimum—cr-i-terMia and methods prescribed in the Naval Facilities Engineering Command Design Manual, FAVFAC DM -26, U.S. Department of Navy; S o�Protion Manual, U.S—.Department o�f the Army Corps of Engineers; U.S. Department of Army Coastal Engineering Research Center Technical Papers and Reports; the Technical and Design Memoranda of the Division of Beaches and Shores, Florida Department of Natural Resources; or other professionally recognized methodologies which produce equivalent design criteria. (b) Breaking, broken and nonbreaking waves shall be considered as they may be applicable. Design wave loading analysis shall consider vertical uplift pressures and all lateral pressures to include impact as well as dynamic loading and the harmonic intensification resulting from repetitive waves. (8) Hydrostatic loads. Calculations for hydrostatic loads shall consider the maximum water pressure resulting from a fully peaked, breaking wave superimposed upon the design storm surge with dynamic wave setup. Both free and hydrostatic loads shall be considered. Hydrostatic loads which are confined shall be determined using the maximum elevation to which the confined water would freely rise if unconfined. Vertical hydrostatic loads shall be considered both vertically downward and upward on horizontal or inclined surfaces of major structures (e.g., floors, slabs, roofs, walls). Lateral hydrostatic loads shall be considered as forces acting horizontally above and below grade on vertical or inclined SmeadSoft Reprint Date: Tuesday, August 20, 2013 - 12:05:37 - OfficialDocuments:611, Attachment Id 0, Page 9 surfaces. Hydrostatic loads on irregular is curved geometric surfaces shall be determined by considering the separate vertical and horizontal components acting simultaneously under the distribution of the hydrostatic pressures. (9) Hydrodynamic loads. Hydrodynamic loads shall consider the maximum water pressures resulting from the mnt i nn of the watP_r mass associated with the design storm. Full intensity loading shall be applied on all structural surfaces above the design grade which would affect the flow velocities. (10) Desiqn conditions - General: (a) Foundations for all major structures shall be designed for the horizontal and vertical pressures generated by wave forces between the elevation of the design breaking wave crest or wave uprush superimposed upon the storm surge and the stable soil elevation of the site. (b) All major structures shall be designed to withstand 110 mile per hour windspeeds in accordance with the Standard Building Code. (c) Appropriate shape factors shall be applied for resistance against overturning and uplift as required elsewhere in this code. Internal pressures on interna -1 ---walls, ceilings, and floors resulting from damaged windows or doors shall be considered in the design unless the specified windows and doors have been tested by an approved testing agency and have been shown to be capable ---of withstanding the design pressures required herein. (d) Mobile homes shall conform to the Federal Mobile Home Construction and Safety Standards of the Uniform Standards Code ANSI book 1A-119.1, pursuant to section 320.823, Florida Statutes, in addition to the other requirements contained in this chapter. Section 402.12 Structural requirements for nonhabitable major structures Nonhabitable major structures need not meet the specific structural requirements of Section 402.11, except that they shall be designed to produce the minimum adverse impact on the beach and dune system and shall comply with the applicable standards of construction found elsewhere in this code. All sewage treatment and public water supply systems shall be floodproofed to prevent infiltration of surface water anticipated under design storm conditions. Underground utilities, excluding pad transformers and vaults, shall be floodproofed to prevent infiltration of surface water expected under design storm conditions or shall otherwise be designed to function when submerged under such storm conditions. SmeadSoft Reprint Date: Tuesday, August 20, 2013 - 12:05:37 - OfficialDocuments:611, Attachment Id 0, Page 10 Section 402.13 Structural requirements for minor structures Minor structures need not meet the specific structural requirements of Section 402.11, except that they shall be designed to produce the minimum adverse impact on the beach and dune system and shall comply with the applicable standards of construction found elsewhere 1n this Inde. Section 402.14 Location of construction Construction, except for elevated walkways, lifeguard support stands, piers, beach access ramps, gazebos, etc., shall be located a sufficient distance landward of the beach to permit natural shoreline fluctuations and to preserve dune stability. Construction including excavation; may occur to the extent that the natural storm buffering and protection capability of the dune is not diminished. Section 402.15 Public access Where the public has established an accessway through private lands to lands seaward of the mean high tide or water line by prescription; prescri-ptive easement, or any other legal means, development or construction shall not interfere with such right of access unless a comparable alternative accessway is provided. The developer s a nave the right to improve, consolidate, or relocate such public accessways so long as they are: (1) Of substantially similar quality and convenience to the public; (2) Approved by the local government and whenever improvements are involved seaward of the coastal construction control line the additional approval of—the Department of Natural Resources is required; and (3) Consistent with the coastal management element of the local comprehensive plan adopted pursuant to Section 163.3187, Florida Statutes. Section 402.16 References Assistance in determining the design parameters and methodologies necessary to comply with the requirements of this chapter may be obtained from: Shore Protection Manual,-- S. Army Corps of Engineers, 4th edition, 1984. -)---US: Department of—the-Army, Coastal Engineering Research Center's Technical Papers and Reports. 9 SmeadSoft Reprint Date: Tuesday, August 20, 2013 - 12:05:37 - OffcialDocuments:611, Attachment Id 0, Page 11 (3) Florida Department of Natural Resources, Division of Beaches and Shores Technical and Design Memoranda. (4) Naval Facilities Engineering Command Design Manual, NAVFAC DM -26, U.S. Department of the Navy. 10 SmeadSoff Reprint Date: Tuesday, August 20, 2013 - 12:05:38 - OfficialDocuments:611, Attachment Id 0, Page 12