(1) Boom length indicated. The length must be
plainly marked on each boom section of a mobile crane having a sectioned
boom.
(2) Radius or boom angle
indicator. A radius or boom angle indicator must be installed where it is
readily visible to the operator's normal operating position on all cranes
having a movable working boom.
(3)
Safety device for light fixtures. Any light fixtures attached to a crane boom
or machinery house must have a safety strap or other device attached which will
prevent the fixture from falling.
(4) Boom stops. Boom stops must be:
(a) Installed to govern the upward travel of
the boom to a safe limit; and
(b)
Of adequate strength to prevent the boom from traveling past the vertical
position.
(5) Controls
marked. Crane operating controls must be marked or an explanation of the
controls' functions must be posted in full view of the operator.
(6) Locking hydraulic outriggers. Hydraulic
outriggers must be:
(a) Equipped with a pilot
operated check valve; or
(b)
Installed with a mechanical lock which will prevent outriggers from retracting
in case of failure of the hydraulic system.
(7) Top of boom painted. The top six feet of
the boom or jib must be painted bright yellow or other bright contrasting color
if the boom is yellow.
(8) Warning
devices. All cranes must be equipped with a suitable warning device such as a
horn or whistle.
(9) Hook safety
device. All hooks must be equipped with a safety device or other effective
means must be used to prevent accidental unhooking of the load.
(10) Counterweight limited. The amount of
crane counterweight must not exceed the maximum amount specified by the crane
manufacturer.
(11) Use proper size
wire rope for sheaves. The size and diameter of sheaves and wire rope must be
compatible and follow the recommendations by the manufacturer, published by the
Wire Rope Institute or other acceptable engineering practices.
(12) Loading or unloading gear. Unloading
gear such as grapples, tongs, and buckets, must not be left suspended when not
in use or whenever the machine is unattended.
(13) No one under load. Personnel must not
position themselves under crane loads and such loads must not be carried over
workers.
(14) Operating clearance
from stationary objects. Where the area is accessible to workers:
(a) A distance of 30 inches must be
maintained between the outermost part of a revolving crane and any stationary
object within the swing radius of the crane; or
(b) The hazardous area must be temporarily
guarded or barricaded.
(15) See WAC
296-24-960 when working around
energized lines.
(16) Operators
must avoid contacting overhead obstructions which may damage the boom or
adversely affect stability. In instances where the operator may have difficulty
in observing clearances, a signal person must be stationed where they can
observe clearances and signal the operator.
(17) Safe travel across thoroughfares or
railroad tracks.
(a) When moving cranes,
shovels or similar types of equipment across thoroughfares or railroad tracks
and the operator does not have a clear vision of approaching traffic, a flag
person must be used.
(b) The flag
person must be stationed where the equipment operator can be signaled and other
traffic can be controlled.
(18) Only a designated member of the crew may
give signals to the crane operator. Exception: Anyone may give an emergency
stop signal.
(19) Standard hand
signals. When using visual signals, standard hand signals as illustrated below,
must be used for directing crane operators.
CRAWLER, LOCOMOTIVE, AND TRUCK CRANES STANDARD HAND SIGNALS FOR
CRANES
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here to view image
Click
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STANDARD HAND SIGNALS FOR CONTROLLING OVERHEAD AND GANTRY
CRANES
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