CDL General Knowledge TestTransporting Cargo SafelyMedium
A driver is transporting a load of empty barrels that are stacked two high on a flatbed trailer. The barrels are not interlocked or contained by sideboards. What is the primary method of securement for the upper tier of barrels?
- AAt least two tiedowns over the top tier, secured to the trailer frame.
- BEach barrel in the upper tier must be individually secured with its own tiedown.
- CThe upper tier must be blocked from all sides to prevent movement.
- DA single tiedown over the entire stack.
Show answer & explanationAnswer & explanation
Correct answer: A. At least two tiedowns over the top tier, secured to the trailer frame.
When transporting stacked items like empty barrels that are not interlocked or contained, the FMCSA regulations (393.118) require that each tier must be secured. For the upper tier, at least two tiedowns are typically needed, passing over the top of the tier and secured to the trailer structure, to prevent movement in all directions.
Why the other options are wrong
- B. While effective, individual securement of every barrel in the upper tier is often an over-securement beyond the minimum regulatory requirement for this scenario.
- C. Blocking is important for horizontal movement, but without tiedowns, vertical movement and tipping are not adequately addressed for an upper tier.
- D. A single tiedown is generally insufficient for a stack, as it may not prevent movement in all directions.
Securing Stacked Cargo (Non-Interlocked)
Cargo stacked in multiple tiers, where items are not interlocked or contained by vehicle structure, requires specific securement for each tier.
- Each tier must be secured.
- Upper tiers typically require at least two tiedowns.
- Tiedowns prevent movement in all directions (vertical, horizontal).
- Blocking may be used in conjunction with tiedowns.
Memory trick: Stacked high, not intertwined, two straps for the top, keep it aligned!