here is the reason why you should never tip on an angle, always keep it straight
why is that happening? I have seen lots of videos of tippers falling over without any evident reason which have been tipping on a flat and solid ground
I do not have much experience on tippers but have driven an 8 wheeler and an artic. When I tipped in the artic I always had the unit and trailer in line. To me that is just common sense but maybe someone with more experience will know the score.
It looks like the load didn’t empty evenly, not that I know anything about tipping, or much else…
But I now know never to do that. The poor driver! 
I have done tipping on slight angles (Nothing like that) and thought nothing of it.
Going to be watching the trailer more in the mirrors from now on. I have put a tipper on its side before but that was due to speed on a roundabout. 
Priest:
why is that happening? I have seen lots of videos of tippers falling over without any evident reason which have been tipping on a flat and solid ground
Sometimes the tipper bar shears or the bodies come off the back bracket ,or load sticking in one side .
scoobyears:
here is the reason why you should never tip on an angle, always keep it straight
Be warned,says at bottom of vid that the guy driving ,was killed, I for 1 wouldent have watched video, if I had known that beforehand, amen
Sticky load can do it
Hadn’t watched the video. What a plonker
as said above load sticks at front o the trailer or,loaded to much to one side, I always kept her as straight as possible and more than a few times if I wasn’t happy about the site being firm enough it was unloaded where I thought was safe. One of the better than UK things in Canada was that all the end dumps I pull …dump the air on trailer suspension and drives the minute I pop the tailgate open
Weather conditions wind ,rain,frost all come in to play as well.
never watched the video as he died .
The problem with artics is that their lateral stability is all dependent on transmitting the forces through the pin and fifth wheel to the drive axle with all ideally needing to be in line to do it.Which gets worse as the C of G gets higher and as the drive axle moves out of line with the trailer and especially factoring in the fore and aft compliance in the fifth wheel mounting when turned at a different angle.The C of G obviously being higher at the front end in the case of artic tipper trailers when tipping.
Using only rigids and if necessary a drawbar turntable type trailer for tippers is probably the safest realistic answer to the problem of a driver getting it wrong. 
I used to dump the air too ,but there’s plenty who don’t !
So is it gambling as you nevet know whethrr it gets sticky or not? 
It’s the simple lever principle, the longer the lever the less force required to operate it
Assuming it’s a sticky load you’ve got all that weight high up, on top of a long lever (in this case the ram) all it takes is for things to get slightly out of line and over it goes
plenty of artics went over when i was on tippers…sand sticking in the body,trailers that had been loaded unevenly on one side,one clown was blown over by a cross-wind 
,tar chippings that stuck in one lads body…scared the life out of his dog when that went over!.one newbie tipped his over in 'sorrel whilst tipping a bit of material off on uneven ground…loads more…
Priest:
So is it gambling as you nevet know whethrr it gets sticky or not?
Surely the most important factors are that the ground you tip on is firm and level.
What seems to have happened is when he jackknifed back he’s put a bit of twist/flex into the chassis of the trailer due to the tyre scrub and this has given the body a bit of attitude towards the unit when he’s started lifting.
The biggest weakness though is the fifth wheel and the way that it pivots front to back by being at an angle like he is it allows movement due to the pivot design of a fifth wheel to combat road bumps. As the fifth wheel allows a small amount of movement at the bottom it’s enough to take the whole lot over and it can be clearly seen the momentum, only built from the small amount a fifth wheel pivots is enough to tear the whole fifth wheel from the mountings.
It would be interesting to know if the brakes were applied on the unit, or not, I’ve got a feeling if the brakes were off it may not have happened and the unit would have just rolled a bit as the forces in the trailer chassis unwound.
Had another look and he definitely had the park brake on he rolled forward before giving it one last violent shove back then went foot brake and park brake. If it the unit had rolled forward and naturally settled I doubt it would have happened but would have been safer again to have left the park brake off or obviously tipped straight.
albion1971:
Surely the most important factors are that the ground you tip on is firm and level.
You are correct and I often pull a bulker. I recently had a tip where it turned out that there was about 5 ton stuck at the top of the trailer. It’s not uncommon for bits to get stuck but on this occasion I (got out and looked) (GOAL). No shunting back and forth for me - get the shovel 
3 hours 
This shed was designed with bays for 8 wheelers , I’ve tipped there ,others still do ,this day it was not good .
OAD a lot of modern pto won’t engage with out the handbrake on which is why it’s better to by pass pipe it your self .