Tri-Clamp Column Rack?

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They’ll definitely do the job. You can find network data racks on casters as well.

Tricks of the trade

If you’re looking for a cheap option to rack mount your system check out network data racks. They’re made to hold the weight and you can find them for $80-200. https://www.amazon.com/Rising-Movable-Frame-Network-Server/dp/B07588CZ2D/ref=mp_s_a_1_140?dchild=1&keywords=network+data+rack&qid=1596404918&sr=8-140