Each of these units was about the shape and size of a 20-foot shipping container, and this skeleton form included just the floor, ceiling, and structural supports at each corner.

这些单元中的每一个单元的形状和大小都与一个 20 英尺的集装箱差不多，这个骨架形式只包括地板、天花板和每个角落的结构支撑。