I'd price-compare with McMasterCarr for anything you buy. I try to avoid Fastenal out of general principle due to their wild pricing.
**Will do!
Channel, hot rolled flat bar, and angle iron should be available from somewhere like Alro Metals or Metal Supermarkets, etc, have to research your area more. Even the big steelyards will generally sell to anyone with a credit card and a way to haul it, some even offer processing like cutting to various lengths for some upcharge.
**I'm curious, providing that there's appropriate clearance between the top inside of the beam and the trolley...could this not be a viable attachment point via a drilled hole/appropriately sized threaded rod, nuts, bolts? I have to ask just to put it to bed in my head.
**Thanks for education and taking the time!
The weld is critical in this design, let someone well equipped and experienced do this. It should be back-beveled and stick welded with a 7018 rod.
**Can do, I've got a supplier and welder if it gets outta my comfort level. Not sure my Lincoln buzz box can push enough juice to get good penetration...might better test it!
This is a sketch to better clarify. Its a little crude an not super centered...but hopefully will give you the idea. I have some idea of sizes for a 1/2 ton capability, but don't want to get into that on the internet...overhead lifting is serious business. Trust your structural engineer for the loading. However, I'd use 1/2" dia bolts as a minimum size if I was building it for myself. Need to stay out of the radius on the channels.
** Got it, thanks.