Pennsylvania Code
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
WORK IN COMPRESSED AIR-CAISSONS AND OTHER PLACES
Section 43.89 - Loading and drilling

Universal Citation: 34 PA Code ยง 43.89

Current through Register Vol. 54, No. 38, September 21, 2024

(a) Detonators shall be inserted in the explosives only as required for each round of blasting. Detonators shall not be inserted in the explosive without first making a hole in the cartridge with a sharpened stick. No holes shall be loaded except those to be fired at the next round of blasting. All explosives remaining after loading a round shall be removed from the caisson before any wires are connected. Blasters shall use only hard wood rods for tamping and they shall not tamp or load any hole with a metal bar, nor shall the wooden rod have any metal parts.

(b) All lights used when loading shall be of an enclosed type. If electric flash lamps are used, they shall be constructed so that it is not possible to obtain a difference of potential between any two points on the outside of the lamp casing.

(c) Drilling shall not be started until all remaining butts of old holes are examined for unexploded charges.

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