Those are like the ones I use, only ours sits on stands we built for them. Material is pinned to them, backing first, facing down, batting, then the quilted top. We tie ours mostly because doing them for veterans and get a lot done faster. Prefer tied quilts anyway. Corners are clamped together with whatever works for you. I like the big clamps you squeeze to open up and clamp top board to bottom. This gives you a large square frame, adjusted to the size you need for your quilt. As outside squares are tied off, one can unhook clamp and roll the done piece up so they can reach more of the quilt to tie. We have 10 of these we set up when we have a "quiltarobics" at a local retirement home. People there loved tieing them off, or "tieing one on as we put it". Back in times past, lots of times the frames were put on backs of four chairs at the corners. I have heard of the hanging ones though. As was mentioned, hung from ceiling and pulled up out of the way when not being worked on.