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Safety Standards Flashcards

7 cards from real ASCE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Safety Standards flashcards as text

  1. Under OSHA 29 CFR 1926 Subpart P, at what minimum trench depth must a protective system be provided (unless the excavation is entirely in stable rock)?

    Answer: 5 feet

    OSHA requires protective systems for excavations 5 feet or deeper unless made entirely in stable rock.

  2. A trench is 4 feet or more deep. What is the maximum lateral travel distance to a ladder, ramp, or other safe means of egress?

    Answer: 25 feet

    OSHA 1926.651(c)(2) requires a means of egress within 25 feet of lateral travel for workers in trenches 4 feet or deeper.

  3. What is the maximum allowable slope for a short-term excavation less than 20 feet deep in OSHA Type C soil?

    Answer: 1½H:1V (34°)

    Appendix B of Subpart P limits Type C soil slopes to 1½H:1V, or about 34 degrees.

  4. Excavated spoil and equipment must be kept at least how far from the edge of an excavation?

    Answer: 2 feet

    OSHA 1926.651(j)(2) requires materials and equipment to be at least 2 feet from the excavation edge, or held back by retaining devices.

  5. Under OSHA, a protective system for an excavation deeper than what depth must be designed by a registered professional engineer?

    Answer: 20 feet

    Sloping and shoring systems for excavations over 20 feet deep must be designed by a registered professional engineer.

  6. Which soil classification has an unconfined compressive strength of 1.5 tons per square foot or greater?

    Answer: Type A

    OSHA classifies cohesive soil with unconfined compressive strength of at least 1.5 tsf as Type A.

  7. Who must inspect an excavation daily and after every rainstorm or other hazard-increasing event?

    Answer: A competent person

    OSHA 1926.651(k) requires a competent person to inspect excavations, adjacent areas, and protective systems daily and as conditions change.