CDL General Knowledge TestTransporting Cargo SafelyMedium
Which of the following describes the purpose of using side-to-side blocking for cargo securement?
- ATo prevent the cargo from shifting backward during acceleration.
- BTo prevent the cargo from shifting forward during hard braking.
- CTo prevent the cargo from tipping over during turns.
- DTo prevent the cargo from moving laterally (side-to-side) on the trailer.
Show answer & explanationAnswer & explanation
Correct answer: D. To prevent the cargo from moving laterally (side-to-side) on the trailer.
Blocking is a physical barrier used to prevent cargo movement. Side-to-side blocking specifically refers to placing blocks or bracing against the sides of the cargo to prevent it from sliding laterally across the trailer deck, especially during turns or when the road has a crown.
Why the other options are wrong
- A. Backward shifting is prevented by rear-end blocking or tiedowns.
- B. Forward shifting is prevented by front-end blocking or headboards.
- C. While it can contribute, preventing tipping is more effectively addressed by low center of gravity, proper stacking, and tiedowns providing downward pressure.
Side-to-Side Blocking
A cargo securement technique using physical barriers placed along the sides of cargo to prevent lateral (side-to-side) movement.
- Prevents cargo from sliding left or right.
- Critical for turns and uneven road surfaces.
- Often used in conjunction with tiedowns.
- Must be strong enough to withstand forces.
Memory trick: Side blocks are for the slide, keeping cargo from taking a ride!