30 CFR 57.8531 - Construction and maintenance of ventilation doors.

§ 57.8531 Construction and maintenance of ventilation doors.
Ventilation doors shall be—
(a) Substantially constructed;
(b) Covered with fire-retardant material, if constructed of wood;
(c) Maintained in good condition;
(d) Self-closing, if manually operated; and
(e) Equipped with audible or visual warning devices, if mechanically operated.

Title 30 published on 2013-07-01

no entries appear in the Federal Register after this date.

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United States Code