On Tue, 30 Jan 2018 20:46:39 +0000
(Roger Hayter) wrote:

I want a prefabricated shower cubicle for use on a floor with bouncy
castle-like properties of horizontality,[1] rigidity and flatness.
Therefore, unlike many of them, it cannot rely on rigid connections to
the walls. Presumably some flexible sort of safety chain would be ok.
There isn't even a solid wall I could bracket it to, assuming that
were possible.

Could you build a steel cage tying into the floor and ceiling joists to
provide support, then just stick in a regular corner enclosure?