Probably some crap steel from china and not being completed as well probably hasn't helped but you would have thought they would have thought about the wind problems, they were saying up this way that one of the main beams has snapped some one is going to be up for a few $$$ I would think its also good no one got hurt.
I have seen crap steel many times and is a common complaint with most tooling and equipment from china as well bad castings porous etc mill some of this stuff and you cant believe they get away with but people want cheap so that what you get is crap.
I purchased some cheap bar to work on my lathe yep it was from china it actually had like a grit all the way through it as well as being porous in parts anyway that's what you get for going cheap and saving a buck, it ended up costing more in tooling to complete the job then I made
.
So never again I only use the good stuff and spend the $$$ shame shire steel isn't a bit closer Id rather give them my money.