I think this is the proper sub-forum for this question.
Somewhere on OGR, I thought I saw a way to support an access hatch vertically (over the opening) so that it didn't need to be removed. Essentially, someone could get under the layout, raise up the hatch, latch it in place directly over the opening, and then stand in the opening to do whatever maintenance or task was needed.
Has anyone done that? If so, can you please discuss your approach / technique / components here?