Just throwing this question out Iv been reading alot about what your maximum distance from the trailer kingpin to the center of the trailer axle group and in Canada it said 12.5 meters which is 41 ft I pull a tri axle RGN trailer with a 29 ft well and my distance from the kingpin to the middle axle is 44ft also almost every rgn trailer I see has this same setup my question is. Is there some kind of exemption for our trailers our kingpins sit more forward than most trailers and our axles are all the way to the back. Has anyone ever run into problems at the scales? I run all over Canada and the US except California
Trailer wheelbase
Discussion in 'Canadian Truckers Forum' started by Nick34, Feb 15, 2019.
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I don't think you have much to worry about as long as your total length from bumper to bumper does not exceed 75.5 feet and your trrdem is equally spaced.
The depth of the kingpin on drop trailer depends on how much frame you have behind the 5th wheel, so your mud flaps or frame don't hit the trailer.
Back in the day most deck haulers had removable flaps for this reason.
Tridem Axle: Three equally spaced consecutive axles, having an axle spread of not less than 2.4 m but not more than 3.7 m, which are designed to automatically distribute the load.
https://www.gov.mb.ca/mit/mcd/mce/pdf/mb_vehicle_weights_and_dimensions_guide.pdf
If you ever noticed, a lot of 53' tandem trailers have a vertical line painted over the trailer tandems.
That line is the legal WB marker to line up with the centre of the tandems.
The legal WB for a 53' trailer is the same WB as a 48' trailer.
More reading material, start with this, should give you a good idea.
https://www.nap.edu/read/10382/chapter/9
http://www.transportation.alberta.ca/Content/docType276/Production/Module4.pdf
https://www.trucking.org/ATA Docs/What We Do/Trucking Issues/Documents/Highway Infrastructure and Funding/Report to Congress on the Compilation of Size and Weight Laws.pdf
Weights and Dimensions of Vehicles Regulations - Motor Vehicle Act (Nova Scotia)
Truck Weight Classifications and Restrictions in Saskatchewan | Information for Truckers and Commercial Trucking Companies | Government of SaskatchewanLast edited: Feb 15, 2019
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Never heard of MOT getting hot about kingpin wheelbase, but in Manitoba, you better hope your truck is 244" or shorter pulling a 53'.
3noses Thanks this. -
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That or they just aren't enforcing anything.Zeviander Thanks this. -
My company bought three 265" 389's a year ago, the owner not realizing the wheelbase issue with 53-footers (tandem or tridem), only found out after the ink dried. They require a $3000 per year permit to operate within Manitoba.
48's and Super-B? Not a problem. Manitoba needs to harmonize with the rest of Canada already.HighwaySuperTramp Thanks this. -
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