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Why should tiedowns be attached to anchor points on the vehicle rather than wrapped around rub rails in a way that loads them sideways, unless the rail is rated for it?
- A.Anchor points and rated rub rails are designed for the pull; unrated attachment can bend the rail and lose tension, changing the tiedown angle and strength
- B.Any metal part is an equally strong anchor
- C.Rub rails are the strongest point on every trailer
- D.Attachment point never affects strength
Correct answer
A. Anchor points and rated rub rails are designed for the pull; unrated attachment can bend the rail and lose tension, changing the tiedown angle and strength
Why
Securement is a system of rated components: strap, hook, and anchor must each carry the load in the direction applied. A bent rail or a poor angle silently downgrades the whole system below what the WLL math assumed.
Manual topic: Securement - Anchor Points · From the General Knowledge practice bank (GK-399).