Never really thought much about it, but ship hauls do flex quite a bit from the waves. This video shows it:
https://www.youtube.com/watch?v=89Mw6L69b6Y
That's pretty crazy, but it has to, if it was too rigid the welds would be taking all the force and eventually break, and then the front would fall off.
https://www.youtube.com/watch?v=89Mw6L69b6Y
That's pretty crazy, but it has to, if it was too rigid the welds would be taking all the force and eventually break, and then the front would fall off.