Architect w/ container home design experience

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Problem I found with them is that they become very weak if you cut them for windows, doors, and worst, sides to join them together. You have to weld in tube steel to gain the structural integrity of the frame.
The next issue is the thermal value sucks, for no better word, so excuse me. At least wood used in single wall has some r value. They get blistering hot, they get ch-ch-chilly cold and can sweat in between if air circulation is not achieved, as the steel walls are just that, steel. You will definitely want to go high cube if you do go that route, for better circulation, or space for insulation, depending on your needs.

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