Putting down a steel object on a steel deck produces short term loads that are like crash loads, it is not hard to get 2X from a simple fork lift operation. The loud noise hear when a load is set down is precisely the noise of a 2G impact on the deck (but 2G for only a few milliseconds).
Use some thick rubber pads to absorb the shock and soften the blow, and I would bet the set-down loads reduce to less than 1.5X