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Car Forum / UK Car Forums / General Car Topics (UK group) / July 2009

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5th wheel exibition trailer

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andrew - 17 Jul 2009 21:43 GMT
Next season we're thinking of mounting a stand for trade fairs. As it will
have infrequent use we were thinking along the lines of the trailers that
get used on film sets, with a fifth wheel on a 4wd pick up bed.

This should give a better capacity than an ordinary towed caravan's 3.5
tonnes but what are the licence and tax rules for these hybrids? They all
seem to be imports from US.

AJH
Conor - 18 Jul 2009 11:02 GMT
> Next season we're thinking of mounting a stand for trade fairs. As it will
> have infrequent use we were thinking along the lines of the trailers that
[quoted text clipped - 3 lines]
> tonnes but what are the licence and tax rules for these hybrids? They all
> seem to be imports from US.

You will need Category E adding to your licence which will involve a
test. As the gross train weight will still be 7.5t and under, PLG tax
still applies.

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Conor
www.notebooks-r-us.co.uk
I only please one person per day. Today is not your day. Tomorrow isn't
looking good either. - Scott Adams

andrew - 18 Jul 2009 11:28 GMT
>> Next season we're thinking of mounting a stand for trade fairs. As it
>> will have infrequent use we were thinking along the lines of the trailers
[quoted text clipped - 7 lines]
> test. As the gross train weight will still be 7.5t and under, PLG tax
> still applies.

I have C1E which allows me to drive up to 7.5t mam, or possibly 8.25 I'm not
sure of the interpretation, but it was more the super imposed load of the
combination that I was wondering about. After all the HGV test makes a
distinction between drag trailers and artics.

AJH
Conor - 18 Jul 2009 14:12 GMT
> >> Next season we're thinking of mounting a stand for trade fairs. As it
> >> will have infrequent use we were thinking along the lines of the trailers
[quoted text clipped - 14 lines]
>
> AJH

The only things that count to what licence class you need are the gross
train weight its plated for (maximum weight that the towing vehicle
plus trailer can carry) and how much the trailer is plated for (weighs
when fully loaded).

Your best bet rather than getting the usual duff internet knowledge is
to phone DVLA themselves. They'll want to know what weight the trailer
is when fully loaded to its stated maximum capacity.

Signature

Conor
www.notebooks-r-us.co.uk
I only please one person per day. Today is not your day. Tomorrow isn't
looking good either. - Scott Adams

Conor - 18 Jul 2009 14:14 GMT
> Your best bet rather than getting the usual duff internet knowledge is
> to phone DVLA themselves. They'll want to know what weight the trailer
> is when fully loaded to its stated maximum capacity.

Another consideration is axle weights. If this trailer is going to be a
bit weighty, you'll need to know exactly how much weight the rear axle
is plated for on the pickup and how much weight is actually being put
on it when the loaded trailer is hitched up.

Remember, its about each individual axle weight as well as the gross
and you can get done for being over on an axle even though you're under
the gross.

Signature

Conor
www.notebooks-r-us.co.uk
I only please one person per day. Today is not your day. Tomorrow isn't
looking good either. - Scott Adams

andrew - 18 Jul 2009 15:10 GMT
> Another consideration is axle weights. If this trailer is going to be a
> bit weighty, you'll need to know exactly how much weight the rear axle
> is plated for on the pickup and how much weight is actually being put
> on it when the loaded trailer is hitched up.

I've checked this. The vehicle unladen weight is 1800kg with a gross weight
of 3050kg distributed front axle 1200kg and rear 1650kg. Which I realise
means the weight has to be distributed perfectly to achieve a payload of
2250.

In practise, and allowing for driver and passenger, it looks reasonable for
the super imposed load to be 750 kg over the rear axle.

The gross train weight is 6550. Allowing for a working weight for the pick
up with 2 passengers at 2200kg it seems feasible that the trailer could
gross 4350kg which is more than adequate. What I cannot find is if this
type of coupling with super imposed load is considered to be the same as
any other trailer because the pickup is only rated to pull a drag trailer
with coupled service brakes at 4 tonnes gross trailer weight. The pick up
is a land rover taxed plg.

AJH
Conor - 18 Jul 2009 17:43 GMT
> What I cannot find is if this
> type of coupling with super imposed load is considered to be the same as
> any other trailer because the pickup is only rated to pull a drag trailer
> with coupled service brakes at 4 tonnes gross trailer weight. The pick up
> is a land rover taxed plg.

Of course its not the same as a normal trailer because of where the
load is being placed on the towing vehicle. It will affect BOTH axles.
Its supporting the front end of the trailer just in front of the rear
axle and not behind it. Its also supporting more of the weight than it
would with a conventional trailer due to the position of the trailers
axles.

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Conor
www.notebooks-r-us.co.uk
I only please one person per day. Today is not your day. Tomorrow isn't
looking good either. - Scott Adams

Alan Smith - 19 Jul 2009 00:49 GMT
>> What I cannot find is if this
>> type of coupling with super imposed load is considered to be the same as
[quoted text clipped - 8 lines]
> would with a conventional trailer due to the position of the trailers
> axles.

Just a query, how do these brake? Used to driving artics with airlines
but the LR will have standard hydraulic brakes, How do these get
extended back to the trailer?

Alan...
Conor - 19 Jul 2009 00:55 GMT
> >> What I cannot find is if this
> >> type of coupling with super imposed load is considered to be the same as
[quoted text clipped - 14 lines]
>
> Alan...

AFAIK, its a similar system run off a compressor.

Signature

Conor
www.notebooks-r-us.co.uk
I only please one person per day. Today is not your day. Tomorrow isn't
looking good either. - Scott Adams

 
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