From an engineering perspective, cars and trucks aren’t that heavy, because their weight is spread over a large area, and they can’t squish together like humans

From an engineering perspective, cars and trucks aren’t that heavy, because their weight is spread over a large area, and they can’t squish together like humans. Roughly, you’re not going to get over 60psf with vehicle traffic or storage. People jammed together can be 200psf, as can library stacks, and indoor pools are potentially even worse.