['Specialized Industries']

['Mining']

04/14/2026

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REGSENSE
Topic Search
Specialized Industries - Mining

§57.8531 Construction and maintenance of ventilation doors.

RegSense CFR Regulations Mining Specialized Industries CFR Section English Focus Area USA

Ventilation doors shall be—

(a) Substantially constructed;

(b) Covered with fire-retardant material, if constructed of wood;

(d) Self-closing, if manually operated; and

(e) Equipped with audible or visual warning devices, if mechanically operated.

['Specialized Industries']

['Mining']

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