Genesis 6:14-16

Make yourself an ark of gofer-wood; you are to make the ark with rooms and cover it with pitch both outside and inside.

Here is how you are to build it: the length of the ark is to be 450 feet, its width seventy-five feet and its height forty-five feet.

You are to make an opening for daylight in the ark eighteen inches below its roof. Put a door in its side; and build it with lower, second and third decks.