Glossary › W
- Walking floor
System for loading/unloading trailers. Full-length floor panels are lifted, shifted and lowered in order to move goods along the load deck. Often used when tipping is not possible.
- Warning light
Used on special transport vehicles. Rotates and flashes in all directions.
- Waste collection vehicle
Large volume vehicle used for collecting special waste. The body is aluminium, open topped or with top hatches and usually fitted with a load crane and may tip.
- Waste disposal containers
Waste disposal containers, which are set down and picked up via a cable system.
- Waste disposal trailer
Trailers used for waste disposal equipment like skips, roll-on containers etc.
- Water release valve
Valve used to release water build up in air hoses.
- Water trough
Found in live animal transporters.
- Weight increase
Generally this is the approved increase in the total weight capacity of a vehicle in agreement with the manufacturer.
- Weight reduced
see Ablasten/weight reduction
- Weight reduction
The total allowable weight of trailers and semi-trailers may be downgraded by their owner. For example if a tractor unit has a maximum towing capacity of only 12 tonnes a 16 tonne trailer can be downgraded to 12 tonnes. In Germany this requires a TÜV certificate in accordance with paragraph 19 of the German Regulations. Trailers with load sensitive brakes require no technical action. The total allowable weight is changed in the vehicle registration document.
- Weld-on eyes
Housings for suspension or draw bar bolts.
- Weld-on hinge eyes
Female hinge component that is welded to the side rave of vehicles with drop-sides.
- Wheel chocks
Compulsory in Germany according to road traffic regulations. Prevents stationary trailers rolling away.
- Wheel rims
Trailers use standard rims and offset rims (for tandem wheels).
- Wheel track
The distance from centre to centre of two tyres on one axle.
- Wide tyres
Used to provide a large tyre contact area e.g. 445/65 R 22.5 for construction vehicles.
- Winch, electric
Usually used on off-road vehicles and low loader trailers where a cable is used to pull on loads.
- Wisadeck flooring
A multi layered high strength timber flooring material for trailers and semi-trailers.