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Sump Capacity to Hold The sump must contain at least 25% of the liquid storage capacity of the building. For example, a building designed to store four 55-gallon drums should have a sump that can contain 55 gallons.
Fire Rating Wall ratings are either 2 or 4 hour fire rated. Roof ratings are either 1.5 or 3 hour fire rated. In addition, all Fire-Rated Buildings come with hydraulic operated self-closing, fire-rated doors and fire damper protected vents.