§57.8531. Construction and maintenance of ventilation doors.

30 C.F.R. § 57.8531

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.

Notes, amendments, and revision history

Authority: 30 U.S.C. 811.

Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.