Ouch. Skilled welders in the trailer-building industry are almost an oxymoron. I've looked at plenty of RV trailers where the welds looked like they were done by a 13-year old using sticks and a couple car batteries.
I thought my Weekend warrior was built better than most, but I found a cracked weld on the trailer A-frame. I was not able to get warranty work done in NC, so I decided to take it back to the dealer in Corvallis. Guess what happened on the way home:
http://people.oregonstate.edu/~carringb/I-29/1.jpg
PS - same van, but the damage caused the trailer broad-siding it gave me the perfect excuse to make it a better color.
Likewise, I was able to keep it it my lane, and the truck alongside it manage to escape. And, insurance picked up the tab since it resulted in a collision. About 1-month later, Weekend Warrior announced a recall on all of its trailers, to have the A-frames re-built. About 1-month after that they filed for bankruptcy leaving most owners high-and-dry.