Not quite. The answer is C: No, because excavations made entirely in stable rock are exempt.
1926.652 exempts an excavation made entirely in stable rock from the protective-system requirement, whatever its depth. Thinking that 5 feet or deeper always requires a system is the common error; stable rock is the exception. The rule does not make the stable-rock exception depend on an engineer's certification. Weekly inspection is not the standard; a competent person must inspect excavations daily and as conditions change, and inspection is not a condition of the rock exception.
0 of 1 right so far.
Question 2 of 10.
A scaffold platform is 12 feet long. Unless the cantilevered portion is designed and installed to support the load, what is the most it may extend past its support?
A: 12 in
B: 18 in
C: 6 in
D: 24 in
NEXT: A · B · C · D
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