Howdy!
Can't help with a Class A TH but we due have a Cyclone 4000 TH that we carry a Smart Car in. No problems with weight as the Smart Car weights about 1700 lbs. The ramp on ours handles the weight just fine and is rated well above that. Once the Smart Car is loaded we have no problems inside the TH area able to open the door and get out of the car and even walk totally around the car. We use the D rings mounted in the TH to secure the Smart Car druing travels using ratchet straps through the front and rear wheels.
"Happy Trails"
Chiefneon