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Tasmanian Heavy Vehicle Driver's Handbook - Transport

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10loads and vehicles, and to allow lashings toslide freely when being tensioned.Coupling – A mechanical assembly thatprovides connection between a drawingvehicle and trailer.Cradle – A frame shaped to support anobject or load.Daylight – Means the hours betweensunrise and sunset.Deck – The load carrying platform of avehicle.Dog – A chain tensioner incorporating anover-centre locking action with a fixed orpivoting lever.Dog trailer – A trailer with two axle groups,the front group being steered by a drawbarcoupled to a towing vehicle.Drawbar length – The distance fromthe centre line of the towing pivot to thecentreline of the leading axle group of thetrailer.Drawbar stand – A leg that permits atrailer drawbar to remain clear of theground when uncoupled usually at couplingheight to allow for easier hook-up.Drive shaft – See ‘Tail shaft’.Driveline – The motor, clutch, gearbox,drive shafts, diff(s) and axle(s).Drive Train – The vehicle components thattransmit engine power to the drive wheels.Dual wheels – A matched pair of wheelsattached to each end of an axle.Dunnage – Packing material (eg pieces oftimber, plywood, mats) placed between thecargo and the truck platform, or betweenitems of cargo to level the load and/orincrease friction so the load is less likelyto move during journey. It is also usedto leave a gap between a load and theload deck, or different parts of the load, toenable forklifts tynes to be placed under forlifting.Flat rack – A steel base used to supportloads, fitted with receptacles for twist locksand provision for forklift operation.Flat top – A truck, trailer or semi-trailer thathas flat goods carrying area without sides.Forward control vehicle – A motor vehiclewith the steering wheel in the forwardquarter of the vehicles total length.Freight container – Means a box likegoods receptacle, or load platform,provided with specified corner fittings.Gates – Permanent or removable verticalframes used at the front, side or rear of avehicle’s loading deck to contain its load.Gross combination mass (GCM) – For amotor vehicle, means the greatest possiblesum of the maximum loaded mass of themotor vehicle and of any vehicles thatmay be towed by it at the same time asspecified by the manufacturer of the motorvehicle.Gross trailer mass (GTM) – Means themass transmitted to the ground by theaxles of a trailer when the trailer is loadedto its GVM and connected to a towingvehicle.Gross vehicle mass (GVM) – For avehicle, means the maximum loadedmass of the vehicle as specified by themanufacturer of the vehicle.Lashings – Fastening devices, chains,cables, ropes or webbing used to restrainloads.110<strong>Tasmanian</strong> <strong>Heavy</strong> <strong>Vehicle</strong> <strong>Handbook</strong>

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