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For a non-self-supporting portable ladder, what is the 4-to-1 rule?

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  1. 1 foot out for every 2 feet up
  2. 1 foot out for every 3 feet up
  3. 1 foot out for every 4 feet up

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References

  1. 29 CFR 1926.1053 Portable ladders angle (eCFR) www.ecfr.gov/current/title-29/section-1926.1053 Checked 2026-10-11.

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