interesting for sure.
I sure most of us have seen, heard about, or even done it ourselves..... loading to what surely must be seriously "overloaded" with no ill effect.
I would really love to know what the overall factors of safety they use really are in these things.
My bet is that the safety factors were much greater back when we were kids than they are now, but I'll bet there is still a whole lot of cushion built in..... Not that I'm suggesting purposely overloading, just sayin'
__________________
|