This is apparent with the thicker base beams observed on the open up-sided containers. How much you’d require to strengthen either type of container (if in the least) is surely an engineering analysis question driven by your design and planned utilization, rather than anything we can easily undoubtedly remedy here. https://andreskorcb.dgbloggers.com/30786340/the-best-side-of-40-shipping-containers-under-1-000