Okay, thanks. I will have a welder look at it before letting it go out again.
I somehow wasn’t aware of the warranty. We bought it in Edmonton, 550 km south (nearest dealer) so not easy to take it back and anyway, I suspect the problem arose more than 5 years after purchase. Also, the local welder made it far stronger than when it was new so maybe that was the best solution. Now we are old, retired and camping in a small motorhome. Our daughter & SIL had a great 2000 km trip out of it anyway. I doubt if a 26 year old tent trailer is worth renovating.