Pennsylvania Statutes Title 52 P.S. Mines and Mining § 70-401. Machinery to be guarded

All machinery used in or about the mines and collieries, washeries and preparation plants and especially in breakers, such as engines, rolls, wheels, screens, shafting and belting shall be protected by covering or railing so as to prevent persons from inadvertently walking against or falling upon the same. The sides of stairs, trestles and dangerous plank walks in and around the collieries shall be provided with hand and guard railing to prevent persons from falling over their sides. This section shall not forbid the temporary removal of a fence, guard rail or covering for the purpose of repairs or other operations, if proper precautions are used, and the fence, guardrail or covering is replaced immediately thereafter.