Examkin

Question

Difficulty: MediumCargo Securement: Blocking and Bracing

During a pre-trip cargo inspection of an enclosed trailer, a driver evaluates a shipment of palletized industrial batteries loaded in the center of the deck. Although tiedowns are fastened over the pallets, the driver recognizes that rapid deceleration could cause the pallets to slide forward along the trailer floor. Which securement method must be used on the vehicle deck to directly prevent this forward sliding?

  1. Fitting timber blocking directly against the base of the pallets and securing it firmly to the trailer floorAnswer
  2. B
    Fastening diagonal bracing struts between the upper section of the cargo and non-structural interior wall panels
  3. C
    Adding extra indirect top-over tiedowns to increase downward friction rather than using deck-level barriers
  4. D
    Calculating that the existing strap Working Load Limit equals total freight weight and omitting floor securement

Answer

Fitting timber blocking directly against the base of the pallets and securing it firmly to the trailer floor
According to standard CDL cargo securement principles and FMCSA regulations, blocking consists of timber or metal barriers fastened directly to the trailer deck against the bottom edge of cargo to prevent horizontal movement or sliding. Because braking generates forward inertia along the floor, base blocking positioned in front of the cargo provides the necessary physical restraint.

Step-by-Step Solution

1
Identify the primary motion vector and failure mode described in the scenario
The risk is horizontal forward sliding along the trailer deck during braking forces.
FMCSA and CDL securement standards define specific devices for sliding versus tipping movements.
2
Select the appropriate mechanical securement device for deck-level sliding prevention
Blocking is defined as material fitted against the bottom of cargo on the floor to prevent movement.
Blocking stops horizontal sliding across the deck surface, whereas bracing extends from upper cargo parts to walls or floors to stop tipping.

Key Concept

Distinction between blocking (deck-level sliding prevention) and bracing (upper-level tipping prevention)
Estimated Time:1m 0s
Rate this question

Topics

Cargo Securement: Blocking and Bracing

More questions from this topic