There is a chance that my company will be spec'ing a new truck in the sometime distant future even though we just bought a brand new one a few months ago (small company have 2 trucks). Anyways, we haul flatbeds loaded with material or equipment to/from our jobsites. Usually loads are pretty heavy, varying just under 80,000 with a few going over 80,000 with permits. The one piece of equipment we haul, we have 2 of them, weigh between 62,000-75,000 depending on fuel, material, etc. left in the machine. My question is, what would be the benefits of spec'ing a truck with a drop axle? The new truck we got does not have one but I never really understood the benefits of having it on the tractor since no one can really tell me. If we are hauling a heavy piece like we do does it benefit the axle weights, ease of driving with that heavy of a load, do state DOT like to see you have another axle with that amount of weight, etc.???
Main question: drop, tag, pusher, whatever axle beneficial to spec on a new truck hauling heavy weights?