Program Policy Manual - VOLUME V - Mine Safety and Health ...

MSHA PROGRAM POLICY MANUAL VOLUME V
separately for hazards related to that particular job or work
area. If the machine's operation poses a hazard to the employee
performing the work, the machine shall be shut down until the
work is completed or the hazard no longer exists. General
maintenance and housekeeping can normally be performed while the
machine is in motion except around unguarded energized electric
or moving mechanical equipment.
77.405 Performing Work From a Raised Position;
Safeguards
Mechanical means that are manufactured as an integral part of
the machine for the purpose of securing a portion of the machine
in a raised position are acceptable as meeting the requirements
of this section.
Paragraph (b) of this Section requires that raised, elevated,
and unsecured equipment must be securely blocked to prevent
movement before miners position themselves under or between
moveable components of the equipment. Occasionally, more than
one component location on a machine must be blocked. Blocking
material must be capable of supporting the weight of the
equipment or component. Wood used for blocking material must be
solid and should be flat sided. Most equipment can be safely
blocked with a wooden crib. The crib should be installed on a
solid footing and wedged tightly to the machine to prevent any
initial movement that could dislodge the blocking.
77.408 Welding Operations
Welding operations within enclosed areas where excessive smoke
and fumes accumulate should be ventilated by mechanical means.
77.410 Mobile Equipment; Automatic Warning Devices
The warning device required by this Section need not be provided
for automobiles, jeeps, pickup trucks, and similar vehicles
where the operator's view directly behind the vehicle is not
obstructed. Service vehicles making visits to surface mines or
surface work areas of underground mines are not required to be
equipped with such warning devices.
77.413 Boilers
It is not the intent of this regulation to cause electric hot
water heaters to meet the requirements of this Section, even
though the name "boiler" appears on the name plate. The
regulation applies only to steam boilers.
February 2003 (Release V-33) 173