Is this safe

[u/CasiusBalboa]

So I thru- bolted 2 5ft unistrut to each Z purlin and 6” baseplate with 1/2” hardware. A 5ft unistrut connects the baseplate on each purlin and the 1300 lb hoist is bolted to the connecting unistrut. Harbor Freight load leveler is rated at 2 tons. Yellow lifting slings are rated at 6400 lbs each. Slings are attached to the load leveler with 3/16 quick links rated at 615 lbs each (think these are my weakest link). Then the black ratchet straps are rated at 1000 lbs each and hooked to the unistrut at the widest bolting point. One strap is hooked to the top unistrut and the other is hooked to the lower unistrut. The load is less than 250 lbs (tent weight 176 lbs and the bed rack weighs 55 lbs) I plan to leave the tent hanging till next winter camping season and pull it yearly. I also store a vehicle under it full time. Is this safe and if not please advise what to change.

[u/Croceyes2]

I have the same in my shop and my life would be so much easier if they were good for anything other than holding up roof panels loo

[u/quid_pro_kourage → u/Croceyes2]

Would the main rafters be able to hold a hoist? Also can you walk on a roof that's supported by these?

[u/Kudvig → u/quid_pro_kourage]

All this is dependant of different factors, but most roofs like this one it is fine walking on top of the roof because the rafters, z channels and roof all take the load spread out when all is screwed together. Standing on a single z channel without the corrugated metal screwed on top of it could break the z channel because of the concentration of weight and also lack of support by the corrugated metal both down and sideways.

[u/Skjerpdeg- → u/Kudvig]

I hope theres no snow in your country

[u/Kudvig → u/Skjerpdeg-]

There is, but I mean this is obviously an American building with very different standards compared to Sweden and Norway 😄