If you had a ninety ton load and part of your route took you over a 60t railway bridge ( not sure how they know a railway bridge can take 60t but I’m sure someone on here will l ow ) , why would you need too drive over that bridge at 2 mph , I’d of thought the quicker you crossed over the better , obviously trains would be stopped but would they check bridge in advance , whilst your crossing , what happens if there’s a issue with bridge whilst your crossing , what happens then ta
They aren’t letting you loose with the big boys toys are they Doze? That really is a recipe for disaster 
I don’t know the answer to your query from an engineering point of view, but I’m interested to know 
The higher the speed there’s more chance of vibration which could cause a collapse.
Same reason soldiers marching used to have to break step.
think the person who has planned too route a 90ton load over a 60 ton bridge needs too takin outside and shot for a start
The same reason why you drive slow over ice roads - frozen lakes & rivers.
Physics, vibrations, cracks…
zewanderingfrogs.com/a-drive … ad-to-tuk/
On the A38 near Dursley there is a bridge that you have to slow down from 50mph to 30mph due to it being weak. Is it like the ice road truckers taking it easy over lakes?
I found a strange bridge to go in/out of Tata Steel in Corby, it has a 41t limit. Yet I’m going out at 44t. I asked the security guard about it, I said should I wait if another is on the bridge till it’s clear but he wasn’t bothered ha.
you would not be allowed to take a 90 tonne load over a 60 tonne rated bridge- Unless the first load carrying part of the truck would clear the rated bridge before the back half. and neither half exceeded the rating of the bridge- some bridges will have a higher rating at lower speed as said above due to the shock of such a weight being suddenly imposed on the structure … despite having done a few loads like this over my time I am not a civil engineer so don’t know the science behind it, if I did I would have been paid a lot more !! but all bridges are rated, many times we have built a temporary bridge that sits above the road structure for the load to travel on so no load is imposed on the actual bridge itself
heres an example from a good few years ago at Stallingborough
I now have nightmare visions of Dozy doing one of those “convoi exceptionelles” convoys, recently posted on the We’ve had bigger than that thread this week
m1cks:
The higher the speed there’s more chance of vibration which could cause a collapse.
Same reason soldiers marching used to have to break step.
Ah I see , I was just thinking along the lines of you wouldn’t want that weight on that bridge any longer than you needed too
scotstrucker:
think the person who has planned too route a 90ton load over a 60 ton bridge needs too takin outside and shot for a start
From my understanding he was taking the load into a small village and I’m guessing that was they only route they coils use too get the load in
Rikki-UK:
you would not be allowed to take a 90 tonne load over a 60 tonne rated bridge- Unless the first load carrying part of the truck would clear the rated bridge before the back half. and neither half exceeded the rating of the bridge- some bridges will have a higher rating at lower speed as said above due to the shock of such a weight being suddenly imposed on the structure … despite having done a few loads like this over my time I am not a civil engineer so don’t know the science behind it, if I did I would have been paid a lot more !! but all bridges are rated, many times we have built a temporary bridge that sits above the road structure for the load to travel on so no load is imposed on the actual bridge itselfheres an example from a good few years ago at Stallingborough
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He drives for , all I know is what he’d told my other mate , load was 90t ( no idea what) , going over said bridge into a small village
Not something I’d want to do , but I do find it interesting the loads he takes and the places he has too go , just brings a lot of questions up
Simple fact is, and its why we have notifications- if he had a 90 tonne load his GVW would probably be at a minimum around 130 tonne mark, and that being generous, the bridge owner (railtrack, highways, council whoever) would have been notified of the move and if it was only rated at 60 tonne would not have allowed the load to move over it- its the reason the notification system exists., I suspect your mate is talking out his back side, or, more likely, the configuration of the load/Truck/Trailer was such that at no point was more than 60 tonne imposed on the structure
Rikki! Are you implying that something that Dozy has posted might be ■■■■■■■■? Surely not…
I’ve no idea of the configuration of the load , doesn’t mean anything too me ( not being funny I’ve never had anything too do with this type of work) , do you mean axles ? , I was just told 90 t over a 60 t railway bridge , maybe mate who told me has the same level of understanding of it as me , but above is what he said ,
Known them both for years and both genuine lads , can’t see why --------- would say he took a 90t load over a 60 t bridge if he didn’t , maybe he didn’t give the full facts too my mate who told me , or maybe my mate just doesn’t under stand the ins and outs as I don’t
The Sarge:
Rikki! Are you implying that something that Dozy has posted might be ■■■■■■■■? Surely not…
Big Dave drives for ( think that’s where there yard is ) , I really can’t see why he would need to tell my mate a story who then passed it onto me , maybe we’re both showing a lack of understanding of what he’s saying , but that was what I was told , but second hand
Instead of trying to be the clever ■■■■■■ why don’t you pass on some over your knowledge on the subject as others have , I mean heavy haulage not sheep !!!
Dozy,
I have edited out the company name in your post above, pretty sure your mates talking complete testicles, but to be sure I have asked a group of long standing and well respected heavy haulage drivers and operators - they are not being kind to your mates claim, given that and what you alledged is in fact dangerous to the companies reputation the name has been removed.
raymundo:
How much would one of these max out at ? The transformer was 274 mt.0
Ballast tractor at 40-44 tonne each, then the axle lines and the girder set, I doubt you would get much change out of 400tonne, if the transformer is really 274 Tonne, cos if it is there seems to be a few axles short
pierrot 14:
I now have nightmare visions of Dozy doing one of those “convoi exceptionelles” convoys, recently posted on the We’ve had bigger than that thread this week
No my Mrs description best sums me up , a plodder 
, I’ve never had that I want to do this / that , heavy haulage etc in me ricki would best answer the question but I guess you must really want to do heavy haulage too make a success of it , I’m afraid to say other than doing my apprentiship at rolls Royce and passing it as a machinist ( universal grinder ) I’ve never achivied much , but I’m happy driving trucks all I ever wanted to do , so that’s the main thing .
Nb hope that helps you too sleep better
A few years ago, there was a 500 ton load routed down the M1. It had to cross the Trent bridge, which is rated at 500 ton. The police stopped all traffic, north and south, so that that was the only vehicle on the bridge.
Oh did I wish that people had got it wrong