In flood-hazard areas, mechanical systems must be placed at or above what level?

In flood-hazard areas, mechanical systems are required to be placed at or above base flood elevation. This elevation is defined as the height that floodwaters are expected to rise during a 100-year flood event. By placing mechanical systems at or above this level, it helps to protect them from being inundated by floodwaters, which can cause significant damage and lead to functional failures of these systems. This requirement is critical for ensuring the safety and resilience of buildings and their mechanical systems in flood-prone zones, thereby reducing potential losses during flood events.