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The provisions of T8-7056 of Part 6, T-24, are incorporated herein as a part of these regulations and reads as follows:
T8-7056. Surface Structures Over or Near Mine Openings.
In addition to the provisions of Part 2, the following shall apply to all mine construction.
(a) Change houses, timber framing sheds, storage sheds, or piles of combustible materials shall not be placed or permitted to remain within 100 feet of any mine opening, shaft house, hoist house, explosives magazine, or ventilating fan.
(b) Every building and structure within 100 feet of any mine opening shall be constructed of noncombustible materials or shall be of not less than one-hour fire-resistive construction,except that wooden headframes and headframes with built-in wooden bins for dumping the shaft conveyance may be erected and used over mine shafts.
(c) A fire door shall be installed at the collar of every shaft over which a wooden headframe has been erected.
(d) A fire door shall be installed at every mine opening connected to a surface building or snowshed. Such fire door shall be installed as near to the surface as is practical, and shall be so arranged that it will close automatically in case of fire.
(e) At all times when men are working in a mine and combustible structures are within 100 feet of a mine opening, a man shall be on duty outside the mine and near the mine opening.