Thank you RZ ! That deflection factor is exactly what buddy Kenny was telling the carpenter on the phone call ….. The dump bed was deflecting the roof in the shop . Carpenter is like WTF ? LOL!I hit the ceiling once with my Autocrane… OOPS. I was setting an N-14 on a pallet and forgot about deflection.
On another job It was backed into the customers shop while I was guiding the torque out of a D9G, he was running the crane for me and got a big light fixture.