i knew this would happen when i had a weeks holiday 
,i leave my bridge heights map in the cab next time
peirre:
DD if you measure em on the corner of the headboard to the floor,
It would be totally pointless, as the majority of Double Deckers have a tapered roof at the front.
Iâbe been thinking about this all day. 
(Without the use of a sextant and the formula provided earlier) just how does one get up there to measure the height of a DD) I carry a 3 metre tape, which is sufficient up to 13 - 14 feet, but apart from parking it alongside the window of a first floor office and then climbing out onto the roof, how does one measure the height of a DD with a tapered roof?
âŚor you could always ask a friendly car transporter driver for a lend of his height guage. We wouldnt run higher than 16ft.
Hmm, Krankee got me thinking about this too now!
Youâd want something like a cheap pocket hypsometer (what they use for measuring trees).
It would need to say measure distance with a laser and a sight. If you walked say 50 paces back, and leveled the device perfectly horizontal, you could point the laser at the ground just below the wheels and take a measurement. The device would have to also measure the angle downwards it was tilted at. Then if the laser was sighted a pointed to the edge of the roof of the lorry it would record the second distance and angle above horizontal. Then by using a bit of trigonometry it could work out the height. Providing the user levels the device and accurately picks out the lowest and the highest points an accurate calculation of height can be made.
Excuse me whilst I rush off to the patent office to see if I can file thisâŚ
Cheers,
Rich
(Iâve half of a HND in Civil Engineering)
Or just look at this and replace the tree with a lorry
Krankee:
It would be totally pointless, as the majority of Double Deckers have a tapered roof at the front.
i was refering to measuring a standard trailer without a sloping roof, as the headboard is usually the highest point
Krankee:
I carry a 3 metre tape, which is sufficient up to 13 - 14 feet
get a bigger tape, a 10m stanley tape has a much wider blade and will easily extend vertically 15ft+ ⌠unless theres a serious wind blowing
for my sins in my former life i used to be a plater (welder), so now i have several large tapes left over
Krankee:
how does one measure the height of a DD with a tapered roof?
stand back, you`ll figure out roughly where the highest point is, and measure it from there
peirre:
never take the hight written on the trailer headboard as correct, it is a guide at best, ive known em be a few inches either way, as all the tractors pulling em, can be different hights at the 5th wheel. Check the hight of, every trailer you pull, every time you do a trailer swop!! DD if you measure em on the corner of the headboard to the floor, allow an inch or 2 extra, as theres usually a rain deflector protruding on the roof of tauts/boxes etc. i may be wrong doing so, but when I measure a trailer, ill add a couple of inches, and that is what goes on the cab hight indicator, better to be safe than sorry.
Id hate to think DD coming on here and posting a thread stating "forgive me Trucknet ......... for I have sinned, I have hit a bridge ...... one i was told i CAN get under, but i didnt check"now I may be no angel when it comes to bridges
As we`ve all had close ones,now wasn`t there a thread about carrying a tape and a torch as part of you kit?
I measure the normal trailer and tractor unit every time i am on a different vehicle but there is no way I can ACCURATELY measure a double decker without scaffolding and a safety harness! (H&S and all that).
Does a company not also have to keep details of their vehicles dimensions or something to say when, where and by whom an official body measured them?
Obviously someone should have to measure it on day one to set the height displayed in the cab, who does that? What about the Operator Licence holder, do they have to keep a record of the height of each vehicle and trailer heights?
Whilst i always check the height with a tape measure as a precaution on a standard trailer, is it a legal requirement to do so, daily?
Also surely the height can alter a few inches if you hit a bump or dip at the point of going under a bridge. How does that work?
Sorry to ask so many questions but I am obviously putting safety first.
tachograph:
peirre:
tachograph:
Are Corby Chilled deckers 16â 2" ?i thought they where15
9" :confused: though i aint had 1 of the new donbur 1`s yetwait till DD gets 1 in high winds or 1 thats been loaded slightly top heavy
his â â â â will develope suction cup abilities, that will grab large quantities of seat clothe
dangerousdave sorry to go on about it but you shouldnât really rely on the routes youâre given and being told the vehicle will go under the bridges on that route, what happens if youâre diverted off the route and you donât have a clue of the vehicle height, again sorry to repeat whatâs already been said but you really should take note of peirreâs last post and check the vehicle height, the trailer height will usually be marked on the trailer (usually on the front) , the fifth wheel height is usually 1250 cm but it only takes a few minutes to check with a tape measure, If you know the height of the vehicle and the height of the bridges youâll not only be safer but youâll end the journey less stressed
Good luck.
Me again!!
Do companies keep a list of double decker routes? If not, can a buy a map of double decker routes? I have ordered a Truckers map (no-one told me they existed til I saw it on here, thanks guys), which had low bridges on it, but are there âofficialâ DD routes available anywhere?
Krankee:
dangerousdave:
It was 16â 2" (which goes under the 15â 9" bridge on the North Circular A406),
With that sort of luck, would you care to suggest some Lottery numbers.
The blue one is marked on the headboard as 16â2" but I donât think it is quite that high.
It was 15â 8
dangerousdave:
I measure the normal trailer and tractor unit every time i am on a different vehicle but there is no way I can ACCURATELY measure a double decker without scaffolding and a safety harness!
You can with a proper height guage that we use on the transporters, you do it all from ground level.
dangerousdave:
Obviously someone should have to measure it on day one to set the height displayed in the cab, who does that?
The driver, it is the driverâs responsibility to know the height of the vehicle he is driving. if there is a different driver on day two then he will have to do it again. With a height indicator that can be altered never trust the height displayed, for all you know the last driver could have altered it because he was pulling a different trailer or even just for the hell of it.
dangerousdave:
What about the Operator Licence holder, do they have to keep a record of the height of each vehicle and trailer heights?
There are too many variables involved to keep an accurate measurement of the height of a trailer. Chassis, tyres, rims, fifth wheel etc, etc
dangerousdave:
Whilst i always check the height with a tape measure as a precaution on a standard trailer, is it a legal requirement to do so, daily?
It is a legal responsibility of the driver to know the height of their vehicle, if that vehicle changes daily then yes it is a daily requirement.
bowserman:
dangerousdave:
I measure the normal trailer and tractor unit every time i am on a different vehicle but there is no way I can ACCURATELY measure a double decker without scaffolding and a safety harness!You can with a proper height guage that we use on the transporters, you do it all from ground level.
SO where do I buy a height guage from?