That last sentence of yours Chicken is the reason the ramps on your Ab. truck are probably heavier than you are used to seeing. Crank-up dollies were very rare in our heavy haul operations back in time, they just weren't built heavy enough to stand the abuse and we didn't have any air bag height adjustments to use. All our suspensions were rubber block or almost solid ride springs.
Our "oil field float, 16 wheel" trailers had solid "swing up & pin" legs that were a B!tch for two men to raise or lower let alone someone by themselves. For this reason, if we had a winch tractor the legs remained up all the time & the trailers were pulled up, from the ground, over the live roll with cable assist. However sometimes these trailers were dropped by a high-way hauler without a winch and the legs had to be used. These legs are purposely short so that when the trailer was on the 5th wheel we had clearance to pull it without bottoming out unless the terrain got real uneaven (we didn't want to have to lift those damn legs unless we absolutely had to).
This is why your ramps are so heavy built, some of those trailers were front-loaded to well over 100 thousand pounds weight on the horse-cock, so, because we had no air bag lowering capability available, a very violent "hit & lift" action was proper procedure for a hook up...line up...and about 5 feet rom the trailer nose...pin the throttle!
That is how it is supposed to be done...now for one of my "old trucking stories on how there is an exception to every rule...
Bunch of us were in the Airliner hotel enjoying the company of some of the local lovelies one evening (mid-winter) when one of us suggested we better go out to the lay-down yard beside the hotel and hook under our trailers before their company became more important that delivering those loads the next day...good idea.
One of the guys had to hook under a trailer with standing legs as I described earlier...now remember we just came out of a bar full of "lovelies" that didn't like to drink alone so regular driving skills had been "altered"... a bit...
Dude with the legs-down trailer lined er up and give it the 5 or maybe 8 ft run at er...and missed the pin guide of the 5th wheel totally...that pin hit the wheel plate as far to one side as it could have, slide up the plate until it leveled off then slid over the front of the plate...dude was pined to his trailer but sure not inside the jaws. Now he's got well over a hundred thousand pounds of weight anchoring that pin to the front of the fifth wheel.
After a very short discussion by all of us on the amount of work to assemble a few 40 ton bottle jacks & blocking to lift that trailer about 8 inches...it was decided to find the drivers inside the bar of a couple of 400" bed trucks with "Texas Rigging" gin pole set-ups in the parking lot and bribe them with pre-paid bar tabs of a significant amount...to lift that trailer, one on each side.
Bribing the one driver was easy, he was still in the bar...however the other had "sort-of-paired-up" and was already in one of the rooms...considerable bartering was needed to roust him from that room...I think a phone call to his wife even entered the conversation at one time...we were desperate to get that horse-cock were it was supposed to be...so we could get on with....the final monetary figure was $150 pre paid bar tab for each of them, a lot of money when hi-balls were $0.85 each at the time.