Technical
Loading Dock Equipment Glossary
20+ loading dock terms explained in plain English — for buyers, engineers and facility managers.
Dock Leveler
A height-adjustable bridge between a loading dock and a truck bed. It compensates for the height difference between the dock floor and the trailer so forklifts can load and unload safely.
Hydraulic Dock Leveler
A dock leveler powered by an electro-hydraulic power unit, controlled by a single push-button. It suits high-traffic docks and offers smooth lip extension and platform positioning.
Mechanical Dock Leveler
A spring-assisted dock leveler that requires no external power. Ideal for low-frequency or unpowered docks; the operator releases the spring mechanism to raise the platform.
Edge-of-Dock Leveler
A compact dock leveler mounted on the face of the dock that requires no pit. Used where a pit is impractical or where the dock must remain usable for drive-in access.
Vehicle Restraint
A safety device that locks a trailer's ICC bar to the dock, preventing trailer creep, early departure and landing-gear collapse during loading.
ICC Bar
The rear impact guard (also called a rear underride guard) on a trailer or semi-trailer. Vehicle restraints grip the ICC bar to secure the trailer.
Dock Bumper
A rubber impact absorber bolted to the dock face. It protects the dock and building from truck impact and maintains correct trailer-to-dock spacing.
Dock Shelter
A rigid structure around the dock opening that seals the gap between the dock and a trailer, protecting goods and workers from weather and reducing energy loss.
Dock Seal
A compressible seal (foam, inflatable or curtain style) that the trailer presses against to close the perimeter of the dock opening.
Dock Pit
The recessed area in the dock floor where a pit-mounted dock leveler is installed. Pit dimensions determine which leveler models fit.
Lip
The hinged or telescopic plate at the front of a dock leveler that extends out and rests on the truck bed to form the bridging surface.
Telescopic Lip
A dock leveler lip that extends horizontally outward to reach the truck bed, ideal for wider trailer-to-dock gaps.
Swing Lip
A hinged lip that swings up from the stored position and rests on the truck bed. The standard lip type for most hydraulic and mechanical levelers.
Load Capacity (Rated Capacity)
The maximum weight a dock leveler is rated to support, including the forklift plus its load. Typically stated in tonnes (t) or pounds (lb).
Dock Height (Approach Height)
The vertical height of the loading dock above ground level. It determines the range of trailer bed heights a leveler must cover.
Scissor Lift
A vertical lifting platform used at ground-level loading areas to raise or lower goods between ground and truck bed height where no dock exists.
Yard Ramp
A portable, mobile ramp for loading and unloading trucks at ground level where no dock is available.
CE Marking
A certification mark indicating conformity with European Union health, safety and environmental protection requirements.
UL Certification
A safety certification issued by Underwriters Laboratories (US), verifying a product meets specified safety standards.
EN 1398
The European standard specifying safety requirements for dock levelers, covering design, construction and protective measures.