问题
Shipping containers can be connected by welding, bolting, or twist-locking. For permanent buildings, containers are welded together at the corners. For temporary use, twist locks secure them. Doorways between adjoining containers are cut with steel reinforcement around the opening to maintain structural strength. Plans should be reviewed by an engineer.
你知道吗？
Connecting containers is about controlling how loads move through the structure. Poorly connected units can place stress on areas that were never designed to carry it. 
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