Pennsylvania Code (Last Updated: April 5, 2016) |
Title 34. LABOR AND INDUSTRY |
PART I. Department of Labor and Industry |
Chapter 43. Tunnel Construction and Compressed Air Work |
SubChapter A. TUNNEL CONSTRUCTION AND WORK IN COMPRESSED AIR |
Section 43.29. Means of communication
Latest version.
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When tunnels are driven from shafts more than 250 feet deep, a telephone system shall be maintained which communicates with the surface at each shaft. The system shall include a station or stations readily and quickly accessible to the men at the working level.