Risk Category I

Wind Speed: 120 mph

Buildings and structures that represent a low hazard to human life in the event of failure, including:

• Agricultural facilities
• Certain temporary facilities
• Minor storage facilities
• Screen enclosures

Risk Category II

Wind Speed: 130 mph

Buildings and other structures except those listed in Risk Categories I, III, and IV.

Risk Category III

Wind Speed: 140 mph

Buildings and structures that represent a substantial hazard to human life in the event of failure, including:

• Public assembly buildings with an occupant load greater than 300
• Group E occupancies with an occupant load greater than 250
• Educational occupancies above 12th grade with an occupant load greater than 500
• Group I-2 occupancies with 50 or more resident care recipients without surgery or emergency treatment facilities
• Group I-3 occupancies
• Any other occupancy with an occupant load greater than 5,000
• Power-generating stations and water or wastewater treatment facilities not included in Risk Category IV
• Buildings containing quantities of toxic or explosive materials that exceed allowable quantities and pose a threat to the public if released

Risk Category IV

Wind Speed: 140 mph*

Essential facilities and structures critical to public safety, including:

• Hospitals and facilities with surgery or emergency treatment services
• Fire stations, rescue stations, ambulance stations, and police stations
• Emergency shelters
• Emergency preparedness and operations centers
• Emergency backup utility facilities
• Buildings containing highly toxic materials that pose a public threat
• Aviation control towers and emergency aircraft hangars
• Facilities with critical national defense functions
• Water storage facilities and pump structures required for fire suppression

Note: Wind speed is 150 mph east of State Road 21 for Risk Category IV structures.