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What does working load limit (WLL) mean for a strap or chain used as a tiedown?
- A.It is the breaking strength of the device
- B.It is the weight of the strap itself
- C.Any strap's WLL equals the cargo weight
- D.It is the maximum load the device is rated to handle in service, and the aggregate WLL of tiedowns must be at least half the cargo weight
Correct answer
D. It is the maximum load the device is rated to handle in service, and the aggregate WLL of tiedowns must be at least half the cargo weight
Why
WLL is the safe service rating, well below breaking strength, and inspectors add the WLLs of the tiedowns attached to an article. If that total does not reach 50 percent of the article's weight, the securement is deficient even if the load feels tight.
Manual topic: Securement - WLL · From the General Knowledge practice bank (GK-381).