Genesis 6:15

This is how you are to build it: The ark is to be 450 feet long, 75 feet wide and 45 feet high. Make a roof for it and finish the ark to within 18 inches of the top. Put a door in the side of the ark and make lower, middle and upper decks. I am going to bring flood waters on the earth to destroy all life under the heavens, every creature that has the breath of life in it. Everything on earth will perish.