Major risks in under size caravan tow tugs South Australian Police say
GSA1 rated at 350kg ball
3500kg max tow.
There are major risks involved in towing a caravan or camper trailer if an under sized towing vehicle is used. These risks are compounded when the caravan is over weight. South Australian Police from the SA Road Safety Centre say they believe many caravans are over weight.
The Kerb Weight of the potential tow tug is front and centre as a key step towards towing safety.
Towing regulations throughout Australia accept the vehicle makers numbers about what a vehicle can tow. If these numbers are exceeded the law, warranty and insurance will be offended.
The Kerb Weight of the towing vehicle is the unladen weight. It includes all added extras as well as full tank of fuel. Also add, driver, passengers and hand luggage. It is a weight which must be double checked police say as most motor vehicle are personalised with added extras which add weight to the vehicle. Tow Ball Mass can vary.
Some makers include it as part of the load carrying capacity, of their vehicle some do not. Ask the vehicle maker before purchasing a tow vehicle. Ask the vehicle maker whether their vehicle is designed to be strong enough to cope with the stress of towing on the vehicle's structure.
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1.Gross Vehicle Mass (GVM). Gross Vehicle Mass is the maximum weight permitted for the motor vehicle as nominated by the manufacturer.
2. Kerb Weight of the tow vehicle.
3. Subtract the Kerb Weight from the Gross Vehicle Mass (GVM) and the result is the tow vehicle's current payload capacity.
4. Ball Weight. The Ball Weight (Rated) is a given weight by the caravan, motor vehicle or tow bar manufacturer. The RACQ says - All tow bars made after July 1, 1988, and many made before this date, will have a plate attached that lists the maximum towing weight, the maximum ball load and the make and model of vehicle the bar was designed for.
The vehicle’s specifications will always be the maximum the vehicle can legally tow, even if the tow bar is rated for a higher load. But if any of the tow bar specifications are lower than those given for the vehicle, the tow bar’s specification will override the vehicle’s specifications.
Editors Note: The actual (operational) Tow Ball Mass or Ball Weight is the mass exerted onto the towing vehicle through the towing hitch when the caravan or trailer is laden. Actual Operational Tow Ball Mass is real world towing.
5. The legal towing capability of a motor vehicle is nominated by the manufacturer. In essence never have more than the Ball Weight as stated in the Vehicle's Owners Manual on the Tow Ball.
6.Aggregate Trailer Mass (ATM). ATM is the fully loaded weight of a caravan or trailer when not connected to the tow vehicle.
7. Rated Tare. Rated Tare is the unladen weight of the caravan or trailer when not connected to the tow vehicle.
8. Subtract the Rated Tare from the ATM and the result is the most optimistic caravan or trailers rated payload capability.
The actual Operational situation with the caravan loaded will reduce that payload capability. For example rated payload for the caravan may be 500kg, but Operational payload for the caravan may be 300kg.
Safety must always come first. The Operational weight of the caravan is the figure to work to.
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9. Gross Trailer Mass. (GTM) is the weight of the caravan or tailer transmitted through the caravan or trailers axle/axles to the ground when connected to the tow vehicle. This must exceed the (Rated) Gross Trailer Mass.
10. Ball Weight. Ball Weight is generally 10 per cent of the Aggregate Trailer Mass (ATM).
It is this weight which is transferred to the tow vehicle.
11. Gross Combined Mass (GCM) is the maximum loaded masses of the tow vehicle and anything it is towing. This is as determined by the vehicles manufacturer or by the relevant registration authority.
Editor's Notes: Ground clearance must not be less than 100mm (For any point within 1m fore or aft of any axle, when caravan or trailer is loaded to ATM).
Rear overhang: Measured from the rear of the trailer to the centre of the axle group. This must not exceed the lesser of 3.7m OR the length of the front load space. This includes any other attachments on the rear of the trailer, such as bicycles, spare tyres, fuel containers or boxes.)
Two axles less than 1m apart are considered to be a single axle.
Personal judgement within the laws should be used when towing a caravan in Australia. There are variations, check with State and Federal authorities. Take the time to digest Australian State and Territory road rules as well as vehicle, caravan and trailer manufacturers requirements before travelling.
GoSee suggests The Australian Practical Guide to Towing, released by Tow-Ed. www.tow-ed.com.au as a good source of general information.
Editor's Note: The Public Forums on this web site carry a wealth of practical knowledge on caravan towing and Recreational Vehicle (RV) issues.
To get quick , direct access please go to the Home Page and knock the search word towing into the unique Multi-Search box on the top right of the Home Page.
Scroll down through the wall of info which comes up to the Forums.
On the way down there are many related features and there is expert knowledge available from professionals in the participating Products and Services listings which are a valuable part of this web site. Any topic can be searched in this way on this site.
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Acknowledgement - With the help of our generous sponsor Northstar Jeep, in Kippa-Ring, Queensland on the Redcliffe Peninsula GoSeeAustralia has put together this Information Article. Sponsors cover the cost of staff time researching stories.
It is through sponsors like this that GSA and GSNZ and their information library have remained free to users for the last 10 years.
Northstar Motor Group is one of South East Queensland's largest Chrysler, Jeep, and Dodge dealers. They were awarded the Fiat Chrysler Northern Metro Dealer of the Year for 2012. Northstar traces its history back over 40 years when Alistair Stewart and Mal Wright Chrysler kicked off in Margate, another Redcliffe Suburb. Through owners Bob and Suzi Aldons, Northstar has grown to be one of the largest privately owned companies in the area, but hasn't lost sight of the importance of being a community member. Northstar Motor Group sells Chrysler Dodge, Isuzu Ute, Volkswagen, Alfa Romeo Fiat, Mahindra, Used Cars and importantly for this story Jeep.
For more information
contact: Garth Morrison
Editor Go See Australia and Go See New Zealand Directory
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