We had something like that at my dad's shop. Of course inside the shop
he had a steel I-beam running the length of the shop with an electric
hoist on a trolley, but sometimes we needed to pull an engine or
whatever while outside. We had the "swing set" thing made out of steel
pipe, with caster wheels under all 4 corners. We could roll it around
wherever we wanted, and hook our hand chain hoist to it. However ours
worked for everything we tried to pick up with it without any damage.
> I remember one swing set that a local backyard mechanic had behind his shop.
> Looked like a giant had stomped in the middle of the top cross bar
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