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Typically when I work on campus/multi-building systems, I am using a single underground main and splitting off to each building. Since you don't have to consider a multiple building fire problem, we have typically worked on the hydraulically most-remote building for underground sizing and use wall PIVs to offer individual building shutoffs, with FDCs on the individual buildings.
I'm getting challenged on "what allows this in code?" It's mostly a question of - where is the limit on how long a loop can be? I'm looking at this from a sprinkler design perspective and whether each individual building's sprinkler system is able to perform hydraulically. Is the limit for the length/layout/sizing of a campus underground loop simply the more demanding of Fire Flow or sprinkler system feeds? Is there a code basis for this? Thanks in advance. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
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A building 2,880 sqft, 20-ft in height, Type IIB with classification of 4 for occupancy hazard.
When I calculate the gallons needed for a water storage tank, is this based off a 2-hour fire flow per NFPA 1142? If so, where can I find that requirement? 2,880 sqft x 20-ft height = 57,600 cubic feet / 4 occupancy hazard x .75 = 10,800 gallons. Is this 750 GPM x 120 minutes for a total of 90,000 gallons? Huge difference between the two. Thanks. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe I have a project that is a building 10-ft x 20-ft and is used only for electrical equipment. The building is remotely located, 10 miles from the nearest town.
Would a fire hydrant be required for such a structure? If not, what code exception would allow the omission of a hydrant? Thanks in advance. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe Can an industrial complex/region be considered suburban and rural, thus falling under the application of NFPA 1142?
What is the extent of when NFPA 1142 could be applied? Thanks in advance. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe I have a rather basic question about fire flow . I'm a site/civil engineer working to validate a municipality's capacity for fire flow demand at a townhome development.
According to the New York State Building Code, townhomes do not required sprinkler systems. My next approach was to use the ISO Guide to determine Needed Fire Flow which is based on a few different architectural components. What I'm confused about is where is ISO used versus the NFPA 1142 standard? Are both of the standards meant to consider the large individual unit or building's area? Thanks in advance. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe |
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