Automated Hooks (clamps) for clamping to I beams

I am trying to find if there would be any automatic hooks or clamps to clamp and lift I beams. The I beams are approximately 24' length and weighs approx. 2 Tons. I am planning on hooking the I beams to on overhead crane and move it for painting. In order to do this, I will hook up a spreader bar to the overhead hoist and then I need to somehow hook up the spreader bar to the I beam. I thought I could use somekind of a clamp, one end can be (hooked / clamped) to the bar and the other end can be hooked to the I beam, preferably with automatic controls for safety reasons. So I am trying to find if there is any "automated clamping devices".