The issues with carriers and trucks/ramps is when the ramps and deck are steel. A rubber mat on the deck will solve the steel deck issue and either rubber fixed to the ramps or hardwood inserts on the ramps.
The biggest problem we've had loading a carrier onto an Army 20 Ton plant trailer was when loading on a sloped parking lot without a direct run at the ramps. The carier kept slipping down hill till it was right on the edge of the deck.
