I've got a 350 lb lifting capacity hoist in my shop. Problem is it is hung in a fixed location. I want to hang either an I-beam or H-beam from the ceiling trusses. The beam will be 20' long (two ten foot pieces). I'm thinking of either a 3" or 4" beam and hanging it with beam clamps on 5' centers (clamp picture below). I'm not an engineer and what information I've read on the internet there are several considerations when doing the calcs. Is this size beam adequate for the weight to be lifted? Your input is appreciated.