Underneath Metal Hatchway Doors

Metal hatchway doors are not flush with the concrete frame they’re attached to. As rain comes down on the doors, it will slide down the doors and pool on the concrete around the edges of the doors.

From this point, the water has two paths that it can follow — it can either continue to flow down to the ground, or it will slip underneath the metal hatchway door and onto the stairs inside the hatchway.

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