2.4 The dock: chocks, plates and trailer creep

1 Chock it, restrain it, or don't enter it

Three paragraphs say the same thing from three directions, which is a fair signal of how often it is skipped.

A vehicle restraint that engages the rear impact guard does the same job mechanically and is generally more reliable than a chock on a wet apron — the standard's language is about the outcome (the vehicle does not move), so an engaged restraint satisfies it. What does not satisfy it is a driver's assurance. 1910.178(k)(3) adds the trailer that is not coupled to a tractor: fixed jacks may be necessary to support the semitrailer and prevent upending during loading or unloading, because the weight of a forklift near the nose can stand a parked trailer on end.

2 Trailer creep

Nothing in the CFR uses the phrase, but it is the mechanism behind the fatality above and it is worth naming. Each time a forklift drives in and out of a trailer, the trailer shifts a fraction of an inch away from the dock. Twenty passes later the gap under the plate has opened, the lip of the dockboard is barely engaged, and either a wheel drops into the gap or a person does.

Three things stop it: an engaged restraint or properly seated chocks, glad-hand locks or a key-control procedure so no driver moves the tractor while work is in progress, and a habit of looking at the gap on every trip rather than only on the first. The last one costs nothing and catches the case where the first two were skipped.

3 The dockboard: capacity, securing, run-off

1910.26 is four sentences long and each one is load-bearing.

1. 1
   (a) — dockboards must be capable of supporting the maximum intended load, in accordance with 1910.22(b). The intended load is truck plus load plus operator, not the pallet.
2. 2
   (b)(1) — dockboards put into initial service on or after January 17, 2017 must be designed, constructed and maintained to prevent transfer vehicles from running off the dockboard edge. (b)(2) allows an exception where the employer demonstrates there is no run-off hazard.
3. 3
   (c) — portable dockboards must be secured by anchoring or by devices that prevent them from moving out of a safe position; where securing is not feasible, there must be sufficient contact between the dockboard and the surface to keep it in place.
4. 4
   (e) — portable dockboards must have handholds or other means for safe handling. A 200-pound steel plate moved by two people with no handholds is its own injury.

And from the forklift side, 1910.178(n)(11): dockboards or bridge plates must be properly secured before being driven over, must be driven over carefully and slowly, and their rated capacity must never be exceeded. If the capacity is not legible on the plate, it is not a plate you can use.

4 The edge, and who has to be protected from it

Part 1 covered the four-foot rule; the dock is where it bites. 1910.28(b)(4)(i): each employee on a dockboard must be protected from falling 4 feet or more by a guardrail system or handrails. (b)(4)(ii) lifts that requirement only when all three of the following hold: dockboards are being used solely for materials-handling operations using motorized equipment; the employees involved are not exposed to fall hazards greater than 10 feet; and those employees have been trained in accordance with 1910.30.

Alongside it, 1910.28(b)(1)(iii) allows work on the working side of a loading dock or loading rack platform without fall protection where the employer can demonstrate it is not feasible — but only while that operation is in process, with access limited to authorized employees, and with those employees trained under 1910.30. Both exceptions are narrow, conditional and paired with a training requirement. Neither is a reason to leave an open dock door unguarded all shift.

Open dock doors are worth a rule of their own, because the fall does not need a forklift: a door open with no trailer against it is an unguarded four-foot edge in the middle of a work area. Barriers, gates, chains rated for the job, or simply keeping doors closed when no trailer is spotted — pick one and apply it.

5 Inside the trailer

The trailer is a different room with its own hazards, and three of them are in the standard. 1910.178(m)(7) requires the flooring of trucks, trailers and railroad cars to be checked for breaks and weakness before they are driven onto — soft spots and rotted deck boards are common in old dry vans and they do not announce themselves. 1910.178(m)(6) requires a safe distance from the edge of ramps or platforms while on any elevated dock, platform or freight car, and prohibits using the truck to open or close freight doors.

Then the two that are not about the floor: lighting, because a trailer interior is dark and a person standing in it is invisible from the dock — 1910.178(h)(2) sets the auxiliary-lighting threshold, and good practice is a trailer light on every door. And exhaust: running an internal combustion truck in and out of a sealed box repeatedly is the "closed environment" that 1910.178(l)(3)(ii)(H) names as a training topic, with 1910.178(i)(1) requiring carbon monoxide concentrations to stay within the limits of 1910.1000.

6 Rail cars, and the paragraphs nobody reads

If the building has rail service, three paragraphs apply on top of everything above. 1910.178(k)(2): wheel stops or other recognized positive protection to prevent railroad cars from moving during loading or unloading. 1910.178(k)(4): positive protection to prevent cars from being moved while dockboards or bridge plates are in position. 1910.176(f): derails or bumper blocks on spur tracks where a rolling car could contact cars being worked or enter a building, work area or traffic area.

The reason these read as fussy is that the failure is catastrophic and rare: a car moves a foot while a truck is halfway across the plate. Blue flag procedures — the rail industry's practice of protecting people working on or between cars — are how most facilities operationalize it.