I have never seen anything like that before. I assume the Owner knows the bridge crane should not be used at the same time something is hanging from one of those brackets.
I might be looking at the wrong thing, I think perspective is throwing me off a bit. Those look like they might be intended as cable tray or small pipe supports. I don't love it, but at a low load it's likely not going to cause a catastrophic problem. I could also see a situation where that's a small load and it's uneconomical to pick up the number of required supports another way. That being said, I wouldn't use an L support in that situation. I'd be using something that doesn't torque the beam.
This feels like a situation that happens when a piping or electrical drafter calls out a routing and typical support type without a structural person having an opinion on it.
