I have completed my hoisting apparatus to lift some pieces of Corten steel up to mount on a false face along the top of the container. The pieces are84" x 44". I am going to drill two holes, and use two lift points with a spreader bar so that there is no triangular forces of a lifting bridle. They will be pre drilled, and once up there, tek screwed in 6 places to stabilize, then be plug welded in pre drilled holes, one in every valley, about 7" apart, and 3/8" diameter.
Does anyone know the tearing force for Corten? If I drill a hole 1 to 1.5" in from the edge in two places, and lift equally, I believe that would be safe. Also, does anyone know the tearing force for a 1/2" dia. hole in 1/8" plate? That would be force applied to the hole in a right angle.
I think I am safe here, just wanted to see if anyone knows the figures.