For those who've commented on the 'sea containers' utilitised in my story they are similar to those currently used by most Western Militaries when deployed operationally. The exterior wall of the contain raises on hydraulic arms and is slid into a storage shelf at the top of the unit. This grants access to the unit to those needing to work in it. Common models include field kitchens, technical workshops, medical clinics, mobile bath and laundry units, and much, much more.
Thanks for the feedback.