The seismic capacity for the equipment class of Vertical Pumps (VP) maybe based on earthquake experience data. This equipment class includes pumps with the impeller drive shaft mounted in a vertical (as opposed to horizontal) direction. Vertical pumps are typically powered by an electric drive motor, vertically aligned, and mounted atop a steel or cast-iron support frame that is anchored to a concrete base pad.
Office of Environment, Health, Safety & Security
October 22, 2026
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The seismic capacity for the equipment class of Vertical Pumps (VP) maybe based on earthquake experience data. This equipment class includes pumps with the impeller drive shaft mounted in a vertical (as opposed to horizontal) direction. Vertical pumps are typically powered by an electric drive motor, vertically aligned, and mounted atop a steel or cast-iron support frame that is anchored to a concrete base pad.