To all you doubters out there 
i dont give a ■■■■ what you are saying about whats legal or not about sliding trailers as i know i am safe and legal when i am using a slider 
its obvious to me that there is a lot of people out there that are puting people at risk as they seem to lack common sense no offence btw
Mrknowitall:
To all you doubters out there
So in actual fact you have no evidence to back up your claims and you’re just making it all up as go along.
I dont know what book you have been reading rob k 
But i would ask for your money back as for evidence i dont need to prove anything because i pull sliding trailers all the time and if you think i am making it up as i go along then you are a bigger prat than i took you for in the 1st place no offence intended old chap
Mrknowitall:
I dont know what book you have been reading rob k
You should change your name to Mrscaremongering.
Nitpicking Mode
As far as i know it is illigal to run with the skel closed up with a box on.
And i can say for sure that if you drive with the trailer in the wrong position for the box that you have on depending on the make and spec of trailer, then you can get pulled by vosa and if you are involved in a rta and your trailer is set wrong you will be in trouble with the law and vosa.
i dont give a [zb] what you are saying about whats legal or not about sliding trailers as i know i am safe and legal when i am using a slider
Let us look at the evidence so far. I have copied many parts out of the VOSA operators manual, of the enforcement sanctions and of the type approval documents. No mention of any offence committed yet. So now lets look back at page one at the question;
Can I run a sliding skelly in the closed up position with a box on?
At the bottom of page one there is a diagram from one particular so far unidentified make of sliding semi trailer.
Warning. Do not run trailer in closed position and Do not carry liquid tank containers 
No mention of illegal there, and by mentioning liquid tank containers. I presume they mean full ones, not empty.
The bit I find could incur the wrath of VOSA is the next bit: 1 x 20’ Container Running Position.trailer in blue 20’ locking position 25000kg Max. That could come under design weights or type approval.
Yet we have seen that stone carried in a 20’ box still weighed 27 tonne when transhipped out of the 2200kg box.
As I have said all along, I agree with you, but for different reasons. It isn’t illegal providing axle weights are not exceeded, and pure common sense says that you would not travel down the road with a 6metre 29tonne box on the back pins of a 40’ skelly. A sliding skelly is no different.
Wheel Nut:
At the bottom of page one there is a diagram from one particular so far unidentified make of sliding semi trailer.
Sorry WN. Probably should have posted its a Montracon
We are indeed able to carry empty tanks but not loaded.
Same way we can get a tug from VOSA asking for all paperwork regarding ADR even thou its empty
We all seem to have different views of the correct way of operating a sliding trailer i also use a splitter trailer sometimes but i wont overtax peoples brains explaining about them one thing is obvious and that is most trailers have intructions including pics of the right and wrong ways of using that trailer 
and as for upsetting the brake senses and the abs and suspension just ask a trailer fitter they may or may not explain in detail 
Mrknowitall:
We all seem to have different views of the correct way of operating a sliding trailer
I remember mixer man recently asked your opinion on his brakes, you didn’t seem very clear how they worked, quite alarming to say how much experience you have 
tonka236:
Wheel Nut:
At the bottom of page one there is a diagram from one particular so far unidentified make of sliding semi trailer.
We are indeed able to carry empty tanks but not loaded.
Same way we can get a tug from VOSA asking for all paperwork regarding ADR even thou its empty
Thanks Tonka.
Mrknowitall:
We all seem to have different views of the correct way of operating a sliding trailer
Manufacturers recommendation plates are just that, not the law. So long as the set up doesn’t break any c and u rules, or laws such as axle loadings it’s fine. As MikeC pointed out about the starting gear sticker in his and most lorries. By your logic, if I got stopped by VOSA and then tried to pull away from the checkpoint in 3rd lo they would chase me down and fine me for ignoring the manufacturers written instruction in the cab
I did mention about the diaphram in the brake chamber though but you are right i did misread the bit about it being brake drums instead of discs and i have noticed that people on here dont like it when someone is right about something but im not going to apologise for being right this time and if it upsets you all then its your problem not mine
Using different gears for starting off is not exactly the same danger as having your trailer set correctly And if we all ignored the danger and warnings we would all be in trouble they are there for a good reason
billybigrig:
Mrknowitall:
We all seem to have different views of the correct way of operating a sliding trailerManufacturers recommendation plates are just that, not the law. So long as the set up doesn’t break any c and u rules, or laws such as axle loadings it’s fine. As MikeC pointed out about the starting gear sticker in his and most lorries. By your logic, if I got stopped by VOSA and then tried to pull away from the checkpoint in 3rd lo they would chase me down and fine me for ignoring the manufacturers written instruction in the cab
Don’t give them ideas. 
Me give them ideas I think i will have to agree to disagree do you know any jokes? I need a laugh