Noah's Ark: Primary Internal Cross Beam Structures

Corroboration of Genesis account (Genesis:6-9), Flavius Josephus records the existence of the Ark's very strong cross beams, designed to reduce torque along the hull.

"...Accordingly he entered into that ark, and his wife, and sons, and their wives, and put into it not only other provisions, to support their wants there, but also sent in with the rest all sorts of living creatures, the male and his female, for the preservation of their kinds; and others of them by sevens. Now this ark had firm walls, and a roof, and was braced with cross beams, so that it could not be any way drowned or overborne by the violence of the water..."
[Source: Flavius Josephus' ANTIQUITIES OF THE JEWS; Book I; Chapter 3;
Section 2]

[ https://www.gutenberg.org/files/2848/2848-h/2848-h.htm#link2HCH0004 ]