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 43.91. Loose rock
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(a) After the blast is fired, loosened pieces of rock shall be scaled from the sides of the excavation and after the blasting is completed, the entire working chamber shall be thoroughly scaled.
(b) The foreman in charge shall inspect the working chamber and have all loose rock or ground removed and the chamber made safe before proceeding with the work.