I used to pull a Rodgers 'Croucher' low-bed trailer w/ a detatchable gooseneck hauling construction equipment. The leading edge of the deck was sloped a little and had these little, wedge shaped, flip over ramps made from diamond plate. The rest of the floor was 2" thick rough cut oak 'cept for the tops of the main beams and thinner edge beams.
The little ramps were no problem when loading rubber tire and tracked equipment BUT loading a steel wheeled street roller was a gigantic pain.
There were two tapered oak blocks to sit next to the ramps to provide a sloped ramp against the front ends of the beams where the gooseneck hooked on.
We had three rollers, an old trycicle that I had to back on so the rear wheels went up the ramps b/4 the steering wheel hit the wood ramps, a 10-ton tandem that needed the wood and ramps and a mini-tandem that just fit on the wood ramps.
Picking them up on a rainy day [when the jobsite was empty of workers] meant scouting around for a sand pile to spread some on the steel as it was the only way to load.
Just a little dew was enough to make the heavy roller wheels slide sideways off, usually just b/4 reaching the top of the ramps. You stand on top of a tandem roller to operate it and it would feel like you were going to tip over and be trapped under the roller...
