Tuff Shed Roll-off Roof Observatory

I talked to a local representative of Tuff Shed about Subject for an
8x8' pad I have. They said they could make a custom structure. The
fellow mentioned someone (in the USA) had this done. It would be good to
get his plans. Anyone familiar with someone doing this before?

I don't think the input is a necessity, but it would be helpful to see
what they did. If not, I can sketch it out.