Saw a wild setup at a job site in Phoenix last month
I was driving past a new hospital construction site off the 10 freeway and had to pull over. They had a massive crawler crane, looked like a Liebherr LR 11000, lifting these giant prefab concrete panels. What got me was the rigging. Instead of the usual four-point spreader bar, they had this custom six-point setup with synthetic slings on each corner and two more in the middle. The lift itself was smooth, but I've never seen that many attachment points on a panel that size, maybe 30 feet by 15. The signaler was using hand signals I didn't fully recognize either, looked like some company-specific system. It made me wonder if they were dealing with a known weakness in the panels or just being extra careful. Has anyone else run into a six-point rig for a slab lift, or know what those extra signals might mean?