Well ok Stimpy we must have more junk at UPS Freight then you have.
I've come across a lot of these back breaking roll doors,so I'm telling it like it is here.
My terminal is very small,and we are shopless so we flag these bad trailers when the inbound is unloaded,and send them down the road to our hub with outbound freight.
But every now,and then ,one of our dock workers loads city freight on them,and us drivers are in for a very hard time of it,untill we get it empty,then we tell dispatch to load it outbound,and get rid of it.
Now as far as working with the barn doors you must know I'm well into my 44th year as a city driver in,and around Rochester NY.
Most of my career I worked with barn door trailers,so with what I know about both,I still say its far less hassle have swing door blues,then breaking your back lifting some of these junky roll doors.
This may just be my opinion being I'm a very old city,gear jamming steering, wheel holder?