Not really metal working in the video, but products of metal working in the form of stacked Conex boxes and the ship hull undergoing some severe strain testing in rough seas.
I am not completely familiar with how these boxes lock together when stacked on the ship.
Do they just stack them up like Legos, where the bottom box locks to the deck and the next box locks to the top of the lower box and so forth? So, the strength of the entire stack is dependent on the strength of the lock down of the lowermost box?
If so, the strain on the lowermost box in seas like this must be incredible. Dave Dave