Pennsylvania Statutes Title 52 P.S. Mines and Mining § 70-249. Order props, ties, rails, timber, materials at least one day in advance

Every workman in want of props, ties, rails, timbers or materials shall notify the mine foreman or his assistant of the fact at least one day in advance, giving the length of the props or timber required; and in case of danger from loose roof or sides, he shall not continue to cut or load coal or do any other work within the danger area until the said props and timber have been properly furnished and the place made secure.