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120 130 BAY 120 110 140 150 130 160 105 170 150 140 130 Figure 1609C Ultimate Design Wind Speeds Risk Category I Buildings Notes: 1. Values are nominal design 3- second gust wind speeds in miles per hour (m/s) at 33 ft (10m) above ground for Exposure C category. 2. Linear interpolation between contours is permitted. 3. Islands and coastal areas outside the last contour shall use the last wind speed contour of the coastal area. 4. Mountainous terrain, gorges, ocean promontories, and special wind regions shall be examined for unusual wind conditions. 5. Wind speeds correspond to approximately a 15% probability of exceedance in 50 years (Annual Exceedance Probability = 0.00333, MRI = 300 years). BASIC WIND SPEED. The basic wind speed in miles per hour, for the development of wind loads, shall be determined from Figure 1609. The exact location of wind speed lines shall be established by local ordinance using recognized physical landmarks such as major roads, canals, rivers and lake shores whenever possible. WIND-BORNE DEBRIS REGION. Areas within hurricane- prone regions located: 1. Within 1 mile (1.61 km) of the coastal mean high water line where the ultimate design wind speed Vult is 130 mph (48 m/s) or greater; or 2. In areas where the ultimate design wind speed Vult is 140 mph (53 m/s) or greater For Risk Category II buildings and structures and occupancy category III buildings and structures, except health care facilities, the windborne debris region shall be based on Figure 1609A. For occupancy category IV buildings and structures and occupancy category III health care facilities, the windborne debris region shall be based on Figure 1609B. Figure 1609C Ultimate Design Wind Speeds, for Risk Category I Buildings and Other Structures 0 6 12 18 24 3 Miles Sources: Florida Department of Community Affairs, Codes and Standards Division; Applied Research Associates, Inc.; Florida Geographic Data Library June 28, 2011 ---PAGE BREAK--- 130 140 BAY 130 120 150 160 170 115 140 180 150 140 Figure 1609A Ultimate Design Wind Speeds Risk Category II Buildings Notes: 1. Values are nominal design 3- second gust wind speeds in miles per hour (m/s) at 33 ft (10m) above ground for Exposure C category. 2. Linear interpolation between contours is permitted. 3. Islands and coastal areas outside the last contour shall use the last wind speed contour of the coastal area. 4. Mountainous terrain, gorges, ocean promontories, and special wind regions shall be examined for unusual wind conditions. 5. Wind speeds correspond to approximately a 7% probability of exceedance in 50 years (Annual Exceedance Probability = 0.00143, MRI = 700 years). BASIC WIND SPEED. The basic wind speed in miles per hour, for the development of wind loads, shall be determined from Figure 1609. The exact location of wind speed lines shall be established by local ordinance using recognized physical landmarks such as major roads, canals, rivers and lake shores whenever possible. WIND-BORNE DEBRIS REGION. Areas within hurricane- prone regions located: 1. Within 1 mile (1.61 km) of the coastal mean high water line where the ultimate design wind speed Vult is 130 mph (48 m/s) or greater; or 2. In areas where the ultimate design wind speed Vult is 140 mph (53 m/s) or greater For Risk Category II buildings and structures and occupancy category III buildings and structures, except health care facilities, the windborne debris region shall be based on Figure 1609A. For occupancy category IV buildings and structures and occupancy category III health care facilities, the windborne debris region shall be based on Figure 1609B. Figure 1609A Ultimate Design Wind Speeds, for Risk Category II Buildings and Other Structures 0 6 12 18 24 3 Miles Sources: Florida Department of Community Affairs, Codes and Standards Division; Applied Research Associates, Inc.; Florida Geographic Data Library June 28, 2011 ---PAGE BREAK--- 140 150 BAY 140 170 160 130 150 180 190 120 200 160 170 150 Figure 1609B Ultimate Design Wind Speeds Risk Category III and IV Buildings Notes: 1. Values are nominal design 3- second gust wind speeds in miles per hour (m/s) at 33 ft (10m) above ground for Exposure C category. 2. Linear interpolation between contours is permitted. 3. Islands and coastal areas outside the last contour shall use the last wind speed contour of the coastal area. 4. Mountainous terrain, gorges, ocean promontories, and special wind regions shall be examined for unusual wind conditions. 5. Wind speeds correspond to approximately a 3% probability of exceedance in 50 years (Annual Exceedance Probability = 0.000588, MRI = 1700 years). BASIC WIND SPEED. The basic wind speed in miles per hour, for the development of wind loads, shall be determined from Figure 1609. The exact location of wind speed lines shall be established by local ordinance using recognized physical landmarks such as major roads, canals, rivers and lake shores whenever possible. WIND-BORNE DEBRIS REGION. Areas within hurricane- prone regions located: 1. Within 1 mile (1.61 km) of the coastal mean high water line where the ultimate design wind speed Vult is 130 mph (48 m/s) or greater; or 2. In areas where the ultimate design wind speed Vult is 140 mph (53 m/s) or greater For Risk Category II buildings and structures and occupancy category III buildings and structures, except health care facilities, the windborne debris region shall be based on Figure 1609A. For occupancy category IV buildings and structures and occupancy category III health care facilities, the windborne debris region shall be based on Figure 1609B. Figure 1609B Ultimate Design Wind Speeds, for Risk Category III and IV Buildings and Other Structures 0 6 12 18 24 3 Miles Sources: Florida Department of Community Affairs, Codes and Standards Division; Applied Research Associates, Inc.; Florida Geographic Data Library June 28, 2011 ---PAGE BREAK--- CHAPTER 1 GENERAL Table 1.5-1 Risk Category of Buildings and Other Structures for Flood, Wind, Snow, Earthquake, and Ice Loads Use or Occupancy of Buildings and Structures Buildings and other structures that represent a low risk to huma~ life in the event of failure All buildings and other structures except those listed in Risk Categories I, ill, and IV Buildings and other structures, the failure of which could pose a substantial risk to human life. Buildings and other structures, not included in Risk Category IV, with potential to cause a substantial economic impact and/or mass disruption of day-ta-day civilian life in the event of failure. Buildings and other structures not includ~d in Risk Category IV (including. but not limited to, facilities that manufacture, process, handle, store, usc, or dispose of such substances as hazardous fuels, hazardous chemicals, hazardous waste, or explosives) containing toxic or explosive substances where the quantity of the material exceeds a threshold quantity established by the authority having jurisdiction and is sufficient to pose a threat to the public if released." Buildings and other structures designated as essential facilities. Buildings and other structures, the failure of which could pose a substantial hazard to the community. Buildings and other structures (including, but not limited to, facilities that manufacture, process, handle, store, use, or dispose of such substances as hazardous fuels, hazardous chemicals, or hazardous waste) containing sufficient quantities of highly toxic substances where the quantity of the material exceeds a threshold quantity established by the authority having jurisdiction and is sufficient to pose a threat to the public if released." Buildings and other structures required to maintain the functionality of other Risk Category IV structures. Risk Category r D ill IV -Buildings and other structures containing toxic. highly toxic. or explosive substances shall be eligible for classification to a lower Risk Category if it can be demonstrated to the satisfaction of the authoriry having jurisdiction by a hazard assessment as described in Section 1.5.3 that a release of the substances is commensurate with the risk associated with that Risk Category.