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Purpose of occupancy or type of building | Risk Category | Seismic Importance Factor, Ie |
|---|---|---|
Buildings that represent low risk to human life in the event of failure | I | 1.00 |
Buildings other than listed risk categories I, III, and IV | II | 1.00 |
Buildings, the failure of which could pose a substantial risk to human life | III | 1.25 |
Buildings and other structures not included in Risk Category IV (including, but not limited to, facilities that manufacture, process, handle, store, use, 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 | IV | 1.5 |
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