I was heading home on Friday and came along the truck in the above post being loaded. Spent a bit of time watching it being loaded. I spoke with the owner and he tells me just as he got to the top cog the B trailer (front one in pics) had something happen and it just suddenly walked off. The trailers are 4 months old so he is not a happy person......certainly dont blame him! The truck and the A trailer are undamaged.
Saw a bit of manure happenin' just off the ring road in Melb the other day.. reckon this load of scrap may have hit that corner just a bit too fast...
Then again you know what these scrappies are like, eh Chocs???
It is plenty thick enough other wise it would have folded sideways, just has no depth for a stress point half way between king pin and bogie centre. The sudden transition from full depth will concentrate the stess at that point as well.
Just reread cam's bit and I am repeating it LOL
Funnily enough Jimbo. beam engineering doesn't come into the ADR approval, not to say there isn't a responsibility for it to be done. All the engineer wants is the make and model of all the components with approval numbers, then they tell you what size boosters etc to use on the brakes. On a dog trailer there is a drawbar calculation however.