Just clean the floor and give them the mat you would put on the box. This is also a more robust and less wasteful method. They could instead make shelving and that would beore.usefull in a shelter
it’s worth doing this because it raises the person up from the floor which if concrete drains heat quickly, or is less sanitary, and helps caregivers not bend down as much
I’m not sure how being raised off the floor would change things.