We're looking at a fire protection system, Ordinary Hazard Group 2, that requires primary fire protection water from a storage tank.
We are looking at three options, (1) above ground insulated with a heater, (2) underground concrete and (3) underground fiberglass.
I am curious what the community here sees around the industry as being the most common choice here?
The job site already has substantial excavation going on and the job is located in the north east so freezing is a concern. There will be no private hydrant so we don't see the need to carry hose allowance in our tanks sizing.
Thanks in advance.
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