We have a project where window sprinklers are being used as part of a 2-hour Fire Barrier.
The engineer wants the second water source to be enough to run for two hours (that would mean we'd need about 40,000 gallon tanks) in an already-designed building.
Others are arguing that the primary water source needs to meet the listing but the secondary water source can be 30-minutes as that's when the fire department would hook up and operate.
What is the required duration for the secondary water supply?
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