I have a large hoist i"ll try to explain if anyone is interested leave a message or can call 256-591-8095. It is a 12" diameter pipe on a base ,12' length,has roller bearring in very top for 360 deg. turn radious.It has 12" I beam 12' length has a beam trolley on this unit. Would be awesome in any shop or machine shop.Very heavy duty is not home engineered.Factory design have specification charts with unit.The crane assembly asking 1800.00.All this needs is a paint job.For 2300.00 I will throw in a 1 ton chain Air hoist that the crane is set-up for.I am a South Alabama resident.Any ? feel free to call,I am going out of town for a couple days to a jobsite but you can reach at the above no.