293.140. Escapement shafts, how equipped. — Any new escapement shaft constructed or opened for operation after the effective date of this chapter, shall be equipped with a substantial hoist or stairway. Such stairway shall be constructed at an angle not greater than forty-five degrees, and shall be provided with handrails and platform or landing at each turn of stairway.
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(L. 1959 S.B. 188 § 15)