Who loads and unloads huge orders?

99% of the times I loaded and unloaded myself the orders under 500lbs, anyone ever done such 2000-3000 lbs orders? suppliers and customers do that or at least help?

99% of the times I loaded and unloaded myself the orders under 500lbs, anyone ever done such 2000-3000 lbs orders? suppliers and customers do that or at least help?