Open-top operation idea - does anyone do this?

[Mr Fixit]

I am wondering if a train elevator may provide a solution to your loads in loads out problem.
It would unfortunately add to the complexity of the upper bench work in that the penetration area would require additional reinforcement and longitudinal framing, but nothing that couldnt be solved with a bit of nous and lateral thinking. Let me know if you like the idea and require any application of building brain power.
Mark