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FPST2243_04_occupancy

FPST2243_04_occupancy - 1 Automatic Fire Suppression...

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Unformatted text preview: 1 Automatic Fire Suppression Systems FPST2243 UNIT 4 Occupancy Type Objective • Upon completing this module, the student should be able to: – Understand the purpose of occupancy classification – Determine the right occupancy type for design Reading material • OCCUPANCY AND COMMODITY CLASSIFICATIONS---NFPA 13, CHAPTER 5. A brief review on • 1896, sprinkler, valves, hangers, piping. • 1940, staggered spacing of sprinklers, occupancy type (light, ordinary and extra) • 1953~58, standard sprinkler appeared, three subgroups of ordinary (for water supplies) • 1973~74, design curve, room design method, thin wall steel pipe, special sprinkler, hydraulic calculation (performance-based design) • 1991, sprinkler head performance Area/density curve 55 Defining occupancy • Defining the occupancy or hazard must be the first step in system design or plan review • System design must match occupancy for high probability of system success • A wrong occupancy classification or change in occupancy may prove to be the Occupancy and commodity classifications (Chapter 5) • For occupancies that are NOT warehouses, five occupancy classes are identified: Ø Light Hazard Ø Ordinary Hazard, Group 1 and Group 2 Ø Extra Hazard, Group 1 and Group 2 • See Section 5.1 for the definitions • Note that there used to be an Ordinary Classification...
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FPST2243_04_occupancy - 1 Automatic Fire Suppression...

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