I dont have any but could point you in the right directions, all I could do is size one that will support what you need it to ie. any ceiling joist or roof rafters or postings, as well as some load you will add when using the hoist so it will not snap like a twig LOL. I am a structural engineer(P.E.) if you have a digital camera take a pic and let me see what your working with and I may have a few ideas. I just dont want your shop to fall in thats all