Seismic Factors By Zip Code Code Is Assigned
Occupancy categories differ between building codes, so it is important to make sure and specify which building code is assigned to your project.by the seismic provisions of regional model building codes - the Uniform Building Code. Occupancy Category I buildings represent a low hazard to life in the event of failure, while Occupancy Category IV buildings are considered essential facilities. The categories are used to classify buildings and other structures based on occupancy level and nature of use. CODE.(additional limit for Seismic Zone 4) OTHER FACTORS AND PARAMETERS USED TO OBTAIN THE DESIGN BASE SHEAR: Seismic Zone Factor Z (see Table 208-3 & Table 208-4) Near-Source Factors N a and N v (see Table 208-4 and Table 208-5) Soil Profile Type (see Table 208-2) Seismic Source Type (see Table 208-6) Vertical Irregularities (see Table 208-9)Occupancy Category however is a category used to determine structural requirements based on occupancy which can range from I to IV. All other Components Importance Factor (Ip) will be equal to 1.0.Table 13 - Typical Seismic Coefficients and Factors of Safety used in Practice (19). If the component of the project is required to function for life-safety purposes after an earthquake (including fire protection sprinklers), if the component contains hazardous materials, or if the component is in or attached to an Occupancy Category IV Structure and it is needed for continued operation of the facility or its failure could impair the continued operation of the facility you will apply an Importance Factor of 1.5 to your project.
Buildings and other structures with elementary-school, secondary-school, or day-care facilities with an occupant load greater than 250. Covered structures the primary occupancy of which is public assembly with an occupant load of 300. The component importance factor, I p, shall be taken as 1.5 if any of the following conditions apply:Building and other structures that represent a substantial hazard to human life in the event of failure including: Reference Tables and Information From ASCE 7-05 13.1.3 Component Importance FactorAll components shall be assigned a component importance factor as indicated in this section. If you are still confused Contact ISAT to have someone walk you through your project requirements, we are here to help.
Power-generating stations, water-treatment facilities for portable water, waste-water-treatment facilities, and other public-utility facilities not included in Occupancy Category IV. Any structure with an occupant load greater than 5,000. Health-Care facilities with an occupant load of 50 or more resident patients without surgery or emergency-treatment facilities.
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