Just because they don't know how to put it together doesn't mean the technology is bad
Big rigs are c-channel... Just put together properly, lol.
Wow, Tractor trailers have the most twist in their frames than any other truck on the road. They are only as strong as their suspension. This is the biggest upgrade to any weak frame, air ride suspension will make any truck capable of carrying the heavy loads with less possible damage.
Big rigs undergo frame maintenance and inspection often and one of the biggest problem Volvo's, Peterbilts, or any other combination vehicle built up of 8 grade steal is fame rail separation.
Here is a photo of a wrecked frame due to the trailers king pin catching the frame when the tractor pulled away.



