Chas:
I did plenty of bridge strikes on recovery . . . & this doesn’t look like one.
For an impact to roll the truck it would need to be a BIG one & that trailer has had nowt more ‘n’ a slight glance !
Never had a rollover where height restrictions stopped us righting it, I reckon they’ll use airbags to allow skids to be placed at the major friction points then drag it out.
no it wouldn’t, the angle of the bridge to the road would help a slow moving roll over
the corner of the trailer with the damage would have been the first part of the vehicle to hit the bridge
Dipper_Dave:
Quite right can’t use high winds as an excuse due to corner damage (+ a day late), reckon its a 4 - 4.2metre trailer trying to squeeze under a 12’ 9" bridge.
Driver probably blindly following cheap sat nav Or reckoned by going faster the bridge might not notice.
As mentioned probably an agency muppet (no offence intended to agency muppets).
As an agency muppet myself who dabbles for Culina a bit I feel I am unable to disagree with Bald Bloke at this time.
Why would he be using a prat-nav ■■ Tesco supply very accurate route directions to all of their stores and insist that the drivers follow them.
They do supply routes into each store, but if he/she had a couple of stores on, the risk assessments don’t show the routes between the two
Also the sun looks quite bright so was the driver pulling his visor down (or visor already down) and missed the warning signs or as the truck lights are on had he been on such an early start that he had forgotten to turn them off and was well knackered, or perhaps the light switch was knocked in all the cafuffle.
One things for sure these questions and many others will be answered when TNUK CSI turn up…
The monkeys:
They do supply routes into each store, but if he/she had a couple of stores on, the risk assessments don’t show the routes between the two
Then use your savy. clearly didn’t check the height of his unit/trailer before leaving yard.
Or and now i’m really thinking outside the box, did the incident happen long before this picture was taken and the road was soo poorly lit that the driver failed to notice the height markers and was following what he thought to be the correct route.
Notice Laurel and Hardy pictured who are probably part of some emergency call out squad that has 3 members, the third member is the one taking the picture making sure he gets his workmates in to look like they are doing stuff.
The monkeys:
They do supply routes into each store, but if he/she had a couple of stores on, the risk assessments don’t show the routes between the two
Then use your savy. clearly didn’t check the height of his unit/trailer before leaving yard.
Tesco used to carry out spot checks on the height markers in cab when I was working there (on agency for 2 years) and got very stroppy if not set to correct height.
I am not sticking up for the driver here though, as to me unless the trailer has not got a height marked on it, in which case check manually or ask, or the bridge is marked wrongly or not marked at all, then the driver doesn’t have a leg to stand on.
shuttlespanker:
no it wouldn’t, the angle of the bridge to the road would help a slow moving roll over
the corner of the trailer with the damage would have been the first part of the vehicle to hit the bridge
For your slow speed rollover theory to work you will need drive from the drive axle. Does this truck have a limited slip diff?
Does it #(rhymes with Hook).
The very moment it lifted onto one side was the very moment it lost forwards momentum.
TNUK CSI is in full flow here, but I would bet £money that truck was already in a rollover state before that trailer suffered what can only be described as a ‘■■■■■ slap’ from the bridge.
The monkeys:
Tesco used to carry out spot checks on the height markers in cab when I was working there (on agency for 2 years) and got very stroppy if not set to correct height.
I am not sticking up for the driver here though, as to me unless the trailer has not got a height marked on it, in which case check manually or ask, or the bridge is marked wrongly or not marked at all, then the driver doesn’t have a leg to stand on.
He don’t have a leg to stand on.
All our trailers are marked up and units. The unit on it’s own stands at 13’ 2" let alone trying it with a trailer aswell
The risk assessment clearly states don’t use that route to exit store.
Chas:
The very moment it lifted onto one side was the very moment it lost forwards momentum.
TNUK CSI is in full flow here, but I would bet £money that truck was already in a rollover state before that trailer suffered what can only be described as a ‘■■■■■ slap’ from the bridge.
Not really the trailer will be capable of leaning to one side without a dramatic effect on forward momentum as there’s always a bit of play in the kingpin and 5th wheel, not much but enough to allow for only a small reduction in forward momentum that the trailer could start to tilt whilst the tractor unit was still in motion, if speed was great enough this would lead to a roll over, with reduced speed only the trailer getting stuck at 45 degrees would occur.
Notice in the pictures above the trailer has become wedged at 45 degress if there is enough forward momentum to take it past that point then its going over, a ‘load shift’ could also increase the speed of tilt.
I’m over thinking this but get a loaf of bread (preferably a Tesco one as they appear to be less stable) and put a knife at 90 degrees, the loaf will hit the knife and stay stable but have a right chunk cut out of it.
Now as per this thread angle the knife a bit so it only hits the one corner and what you will notice is the loaf loses its stability due to the force applied to the one corner having an equal and opposite reaction on the other, couple this with a cambered surface and hey presto the loaf will start to tilt.
The speed of the forward momentum will have a direct affect on the angle and speed of tilt.
Now hollow out the bread and place some sugar cubes in it (simulating a loaded trailer) and repeat, as the bread tilts the sugar cubes move to one side increasing the tilt effect (load shift etc).
What you will notice from this is that its easy to tip a trailer by hitting the one corner at an angle and your missus will give you a right bollocking for making a mess in the kitchen leading to the ‘cold arse’ treatment at bedtime…
Oh and you will need a solid loaf of bread a sliced loaf doesn’t work very well
For the loaf I tried Tiger bread but its too round and aerodynamic, then a sliced loaf (the least said about that the butter) but for a true accurate result a nice Hovis loaf with 6 wagon wheels (nibbled down to reduce their diameter) works best.
For the tractor unit I used the family cat who although initialy objectionable to this endeavour was tempted into acting as part of the experiment by placing my daughters hamster just in front of it, that funnily enough represented a car in this scenario.
Although a partial success, I do now need a new hamster as things went a bit ■■■■ up when the missus walked in…
shuttlespanker:
no it wouldn’t, the angle of the bridge to the road would help a slow moving roll over
the corner of the trailer with the damage would have been the first part of the vehicle to hit the bridge
For your slow speed rollover theory to work you will need drive from the drive axle. Does this truck have a limited slip diff?
Does it #(rhymes with Hook).
The very moment it lifted onto one side was the very moment it lost forwards momentum.
TNUK CSI is in full flow here, but I would bet £money that truck was already in a rollover state before that trailer suffered what can only be described as a ‘■■■■■ slap’ from the bridge.
As someone who claims to have recovered many bridge strikes, you should know that with at least 14 tonnes+ of vehicle, forward momentum will take it under the bridge regardless of whether there is drive to the axle, and one of two things will happen to the trailer front:
if it hits the bridge square on, It will get smased to bits and obliterated.
If it hits at an angle like this bridge, it will push it over, its as simple as. HTH.
