Genesis 6:14-16

Build a boat for yourself—an ark of sturdy timber. And this is how you are to design it: make separate compartments within it, and seal it inside and out with thick tar. The length is to be 450 feet, its width 75 feet, and its height 45 feet. Cover it with a roof, but leave a gap of eighteen inches at the top for ventilation. Construct a door on the side of the ark, and design it with lower, middle, and upper decks.