answer:Welcome to ask-public. Look, I’ve been around boats and sailed for nearly all of my life. I love boats (though I’ve never built one). But I have no idea what it is you’re asking here. I’m not the only sailor in the forum, and there are certainly better engineers (though I doubt if there are any naval architects, which is what you’re really interested in, I think). So maybe I’ll be surprised. Are you talking about the ability of the ship to withstand the sheer type forces that can break its back – its keel, for example, when it grounds on a reef (as your other question asks)? Or its ability to withstand torsion (twisting) of the hull in heavy weather? Or its tension strength – which is kind of a silly question, I suppose, because what forces act to pull a ship’s bow from its stern? Or how heavily it can be loaded? Or what, exactly? Aside from those questions about your question, while we frequently love a technical question that’s outside of our normal experience and expertise, this one just seems so far outside that I’ll be surprised if you get another answer on the topic. Especially since you’ve given us no details to go on, such as the size of the ship, whether it’s a modern steel-hulled ship (and then, what type? cruise liner, bulk carrier, container or other cargo ship, tanker or warship), or an old-fashioned wooden (or steel) sailing vessel, or what. What, exactly, are you looking for here? As to a general answer, I guess I would say “consult a naval architect or marine engineer with a very specific question about what it is that you’re trying to learn”.