Mich. Admin. Code R. 408.41467 - Fire prevention and protection
Rule 1467.
(1)
The applicable requirements for fire prevention and protection as prescribed in
Construction Safety Standard Part 18. "Fire Prevention and Protection," as
referenced in
R
408.41410, shall be complied with in all tunnel and
shaft operations.
(2) Smoking and
open flames are prohibited. An employer is responsible for collecting all
personal sources of ignition, such as matches and lighters, from all persons.
Welding and cutting, where required, shall comply with the provisions of
subrules (9) to (14) of this rule. A fire watch shall be maintained when hot
work is performed.
(3) Not more
than a 1-day supply of diesel fuel shall be stored in a tunnel or shaft.
Gasoline or liquefied petroleum gas shall not be taken in a tunnel or shaft.
Acetylene or methylacetylene propadiene stabilized gas may be used underground
solely for welding, cutting, and other hot work and only as prescribed in
Construction Safety Standard Part 7. "Welding and Cutting," as referenced in
R 408.41410.
(4) The piping of diesel fuel from the
surface to an underground location is permitted only if all of the following
provisions are complied with:
(a) Diesel fuel
is contained at the surface in a tank with a maximum capacity that is not more
than the amount of fuel required to supply, for a 24-hour period, the equipment
that is serviced by the underground fueling station.
(b) The surface tank is connected to the
underground fueling station by an acceptable pipe or hose system that is
controlled at the surface by a valve and at the shaft bottom by a hose
nozzle.
(c) The pipe is empty at
all times, except when transferring diesel fuel from the surface tank to a
piece of equipment in use underground.
(d) Hoisting operations in the shaft are
suspended during refueling operations if the supply piping in the shaft is not
protected from damage.
(e)
Acetylene, liquefied petroleum gas, and methylacetylene propadiene stabilized
gas may be used underground only for welding, cutting, and other hot work and
only in accordance with subrules (9) to (14) of this rule.
(f) Not more than the amount of fuel gas and
oxygen cylinders necessary to perform welding, cutting, or other hot work
during the next 24-hour period shall be permitted underground.
(5) Leaks and spills of flammable
or combustible fluids shall be cleaned up immediately.
(6) Oil, grease, or diesel fuel that is
stored in a tunnel or shaft shall be kept in tightly sealed containers in
fire-resistant areas at safe distances from explosives, magazines, electrical
installations, and shaft stations. Electrical installations in underground
areas where oil, grease, or diesel fuel are stored shall be used only for
lighting fixtures. Lighting fixtures in storage areas, or within 25 feet (7.62
meters) of underground areas where oil, grease, or diesel fuel are stored,
shall be approved for class I, division 2 locations.
(7) Fire-resistant hydraulic fluids shall be
used in hydraulically actuated underground machinery and equipment. For the
purpose of this requirement, a fire-resistant hydraulic fluid means any liquid
which has a flash point above 200 degrees Fahrenheit and which has a vapor
pressure of not more than 40 p.s.i. (absolute) at 100 degrees Fahrenheit.
(8) An approved 4A:40B:C rating
fire extinguisher or equivalent protection shall be provided at the drive
pulley of an underground conveyor and at 300-foot intervals along the belt. A
minimum of 2 2A-10BC approved fire extinguishers shall be provided at the
tunneling machine.
(9) Internal
combustion engines, except diesel-powered engines on mobile equipment, are
prohibited underground.
(10) Mobile
diesel-powered equipment used underground in atmospheres other than gassy
operations:
(a) Shall comply with MSHA
provisions in
30 CFR
57.5067; or
(b) If purchased on or before July 15, 2019,
may alternatively comply with MSHA provisions under 30 CFR part 32 (revised as
of July 1, 1996) (formerly Schedule 24), or be demonstrated by the employer to
be fully equivalent to such MSHA-approved equipment, and be operated in
accordance with that part.
(11) For purposes of subrules (9) and (10) of
this rule, when an applicable MSHA provision uses the term "mine," use the
phrase "underground construction site." (Each brake horsepower of a diesel
engine requires at least 100 cubic feet (2.832 m3)
of air per minute for suitable operation in addition to the air requirements
for personnel. Some engines may require a greater amount of air to ensure that
the allowable levels of carbon monoxide, nitric oxide, and nitrogen dioxide are
not exceeded.)
(12) Fire-resistant
hydraulic fluids shall be used in hydraulically-actuated underground machinery
and equipment unless such equipment is protected by a fire suppression system
or by multipurpose fire extinguisher or fire extinguishers of sufficient
capacity for the type and size of hydraulic equipment involved, but rated at
least 4A:40B:C.
(13) A
noncombustible barrier shall be installed below welding or burning
operations.
(14) In an underground
operation, local gas checks shall be made before and during a welding or
cutting operation and during a drilling operation that would penetrate the
tunnel.
(15) Whenever 5% or more of
the lower explosive limit for methane or other flammable gases is detected in
any underground work area or in the air return, an employer shall take steps to
increase ventilation air volume or otherwise control the gas concentration,
unless the employer is operating in accordance with the potentially gassy or
gassy operation requirements. Such additional ventilation controls may be
discontinued when gas concentrations are reduced below 5% of the lower
explosive limit, but shall be reinstituted whenever the 5% level is
exceeded.
(16) Whenever 10% or more
of the lower explosive limit for methane or other flammable gases is detected
in the vicinity of welding, cutting, or other hot work, such work shall be
suspended until the concentration of such flammable gas is reduced to less than
10% of the lower explosive limit.
(17) A fire watch shall be maintained around
welding and cutting operations until all possibility of fire is eliminated. The
fire watch shall be provided with a minimum of 1 approved 2A-10BC fire
extinguisher.
(18) Flammable
materials or supplies, other than those used during 1 shift, shall not be
stored within 100 feet (30.48 meters) of any tunnel or shaft opening. If this
is not feasible because of space limitations on the jobsite, then such
materials may be located within the 100 foot limit, if both of the following
provisions are complied with:
(a) The
materials are located as far as practicable from the opening.
(b) A fire resistant barrier of not less than
a 1-hour rating is placed between the stored material and the opening or
additional precautions are taken that will protect the materials from ignition
sources.
Notes
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