Help Advice Construction Swivel Arm Jib Crane Hoist

[wizard69]

I don't want to be rude but you really don't want to be attaching such a load to any concrete column, especially one of unknown construction. At a minimal you will wnat to contact the engineer that designed the building in the first place. The potential for failure is huge. Further more this is a situation where you either buy a turn key engineered solution or do the engineering yourself. In most countries you will be legally liable for any harm done if things break.

In the USA there are companies selling free standing jib cranes with the engineering already done, that includes the foundation requirements. This is the way to go if you don't want to engage in an engineering study yourself. Everything is laid out for you including rebar, stud requirements, hole depth, hole diameter and what ever else needs to be considered design wise.

This is one of those DIY projects that really requires proper engineering to be even remotely safe.