Tow Truck - ANSA motor vehicle that tows or carries a disabled, illegally parked or
abandoned vehicle.
GVWR - ANSGross Vehicle Weight Rating
GCVR - ANSGross Combination weight rating. The GVWR plus the GVWR of the vehicle
being towed equals the GCVR.
Light duty - ANSGVWR of 8,600 to 10,000 pounds
Medium Duty - ANSGVWR of 10,001 to 26,000
Heavy duty - ANSGVWR over 26,000 pounds
Car carrier - ANSA vehicle designed to transport 1 to 3 motor vehicles. Car carriers use a
platform that is used to facilitate the operation of towing one or many vehicles. They are
known also as flatbeds, Slideback, equipment transporters and rollbacks.
Overloading - ANSOverloading can cause undetected damage, weaken the equipment
significantly and cause equipment failure which can result in injury or death.
GAWR - ANSGross Axle Weight Rating which is used to describe the weight of a single axle
or a combination of axles is designed to carry.
Overhang - ANSOverhang is measured from the center of the lift point to the center of the
rear axle of the tow trucks. The safe towing capacity decreases when overhang increases.
STC - ANSSafe towing capacity - Defined as the amount of weight or load that does not
cause more than a 50% loss of original unloaded front axle weight.
Wheelbase - ANSThe distance from the centerline of the front axle to the centerline of the
rear axle.
The breaking strength rating - ANSTBSR is established by the manufacturer as the
maximum weight or load that new, unused equipment can bear under ideal laboratory
conditions.
The weight load limit - ANSThe weight load limit - The maximum weight or load that
equipment can bear under normal operating conditions.
Boom - ANSA structural member of a tow truck that extends from a mast to support the load
and extend or lift a load free of the ground.
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