Dock Safety – Hazards of Loading and Unloading Trailers

December 20, 2011

In forklift operator safety classes, ProLift’s Safety Trainer asks “who loads and unloads trailers?” To those with raised hands, he says “Okay, your chance of getting hurt is doubled!” The response is amazing – hands go down fast and confusion is displayed on the operators’ faces. However, this statement is reality. The risks and hazards double when a forklift operator interacts with another piece of equipment (tractor trailer) and another human (truck driver).

Forklift operators must be on guard when using other equipment. Trucks and trailers can creep away from docks while loading and unloading due to the weight and force of the forklift. Trailer floors can be weak or damaged. Dock levelers or bridge plates can malfunction or break. Trailers can be tipped by the weight of the forklift if they are not connected to a tractor.

It is also important the forklift operator be aware of the truck driver. The fast pace and pressure to deliver loads can result in drivers prematurely pulling away from docks with a forklift inside. Other times, an operator may drive off the dock if he or she expects the trailer to be in place.  

In addition to setting the brakes on the truck, forklift operators must not drive fast or get aggressive with the forklift brakes inside a trailer. If an operator quickly enters a truck and slams on the brakes, the weight of the forklift and its load will move a trailer even if the truck brakes are set and the wheel chocks are in place. Dock locking systems cannot be trusted blindly since rear impact guards (ICC bars) on trailers can be damaged or missing.

Moveable rear trailer axles must be in the most rearward position. If the operator loads or unloads a dropped trailer, he or she must use a jack stand to support the front of the trailer.

Elevated dock areas pose potential for forklift tip-over, the leading cause of operator fatality. Forklift operators must look backwards to guide them out of the trailer and not rely on peripheral vision. If he or she waits to look back after hearing the forklift’s steer tires hit the dock plate, the operator may not be aware the truck has left the dock and will fall off the truck. Or, a pedestrian walking behind the trailer may be struck.

Companies can take control of dock safety by having the proper safety equipment. A squeegee can remove the hazard of a wet dock area. A push broom used where wheel chocks are expected to block wheels can decrease trailer creep. Policies to control truck drivers such as assigned waiting areas, required possession of the truck keys while loading and unloading and glad hand locks can reduce premature pull-away.

To ask your question about dock safety or safety equipment, contact ProLift. ProLift also provides dock equipment maintenance programs.

Dock Safety – Avoiding Trailer Creep

June 24, 2011

When a lift truck is involved in an accident on a loading dock the injuries are more likely to be severe. They may even result in the death of an operator or pedestrian. The motion of a lift truck entering and exiting a trailer can cause separation between the trailer and the dock leveler. Known as trailer creep, it is the repetitive forward motion of the trailer.

Factors that affect trailer creep are:

  • Weight and speed of the lift truck and its load
  • Grade of the drive used by the trailer
  • Softness of the suspension
  • The type of transition between the trailer and the lift truck (i.e. dock leveler, dock board)
  • Lack of connection of the trailer to a tractor

OSHA regulation requires the use of restraints when loading and unloading trucks and trailers. Historically, wheel chocks have been used to prevent dock separation. When using wheel chocks, consider the following questions.

  • Will the surface of the drive cause the selected wheel chock to slip, causing trailer movement?
  • Are workers required to walk between trailers to set and remove wheel chocks?
  • Has visibility of the trailer wheels been provided to workers that ensure wheel chocks are in place?
  • Is a spare set of wheel chocks available?
  • How is the policy of using wheel chocks being enforced?

Other vehicle-restraint devices are available and can be mechanically or hydraulically operated. Design and functionality can vary by manufacturers. Additionally, companies need to consider their application, budget and climate when selecting one of these solutions.

To learn more about OSHA requirements for securing trailers, view these resources:

OSHA Regulation 1910.178(k)(3)
OSHA Standard Interpretations