4 Va. Admin. Code § 25-40-5470

Current through Register Vol. 41, No. 6, November 4, 2024

Section 4VAC25-40-5470 - Installation of air locks

The main ventilation shall be so arranged by means of air locks, overcasts, or undercasts that the passage of trips or persons does not cause interruptions of air currents. Where air locks are impractical, single doors may be used if they are attended constantly while the areas of the mine affected by the doors are being worked, unless they are operated mechanically or are self-closing.

4 Va. Admin. Code § 25-40-5470

Derived from VR480-05-1.2 § 15.271, eff. July 19, 1989; amended, Virginia Register Volume 14, Issue 17, eff. July 1, 1998.

Statutory Authority

§§ 45.1-161.3, 45.1-161.294 and 45.1-161.305 of the Code of Virginia.