Tadano GT-550E-2, Руководство по эксплуатации и обслуживанию

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Do Not Rely Exclusively on Safety
Devices
A safety device is not a substitute for human skill
and judgment.
The overload cutout, for example, does not warn the
operator about conditions on the ground, effects of
wind, improperly adjusted devices, load being
pulled sideways, or other possibly hazardous situa-
tions.
All safety devices are merely auxiliary means to help
the operator perform the task at hand. Safe crane
work requires the qualities of a good operator, such
as skill, experience, judgment, and safety aware-
ness.
Do Not Deactivate Any Safety Devices
Avoid any action that impairs normal operation of
the safety devices.
Intentionally deactivating any safety device may re-
sult in the inability to detect overloading or
overwinding during operation, and lead to a serious
accident.
Ensure that all safety devices are functioning cor-
rectly before starting any operation.
Before Lifting a Load
Make sure of the following before attempting to pick
up a load:
• The mass does not exceed the rated lifting capaci-
ty.
• The number of rope parts conforms to the stan-
dard in the rated lifting capacity table.
• A proper load handling device is used and the
load is securely rigged.
• The hook block is located directly above the cen-
ter of gravity of the load.
• The wire ropes runs are plumb so that the load
can be lifted vertically.
• The safety latch on the hook is working properly.
• The wire rope has no entanglement or disorderly
winding on the drum.
Rig the Load Securely
Improper rigging procedure can result in the lifted
load being dropped. Rig the load securely, paying
special attention to the following points:
• Know the mass, shape and center of gravity of the
load, and use suitable load handling devices and
rigging hardware.
• The load handling devices including wire ropes,
chains and rigging hardware must have enough
strength and be free from damage or excessive
wear.
• Rig the load so that it is suspended at a point
above its center of gravity. Otherwise, the load
can overturn or come loose of the handling device
when it is raised. Also, wire ropes and chains
must not be crossed or twisted around each oth-
er.
• Do not rig the load with a single wire rope. Such
rigging practice is very dangerous as the load can
rotate, and untwist the wire rope, reducing its
strength.
• When rigging a load with sharp corners, fit protec-
tive softeners at the load corners to protect the
wire ropes and the load itself against damage.
Consider Boom Deflection before Lifting
the Load
When a load is lifted, the boom will deflect down-
ward, increasing the load radius. Swaying of the
load also poses a hazard to the people around the
crane, and may lead to overloading.
If the load starts to sway when lifted clear of the
ground, lower the load back on the ground.
When lifting a heavy load or using the extended
boom, anticipate the possible increase in the boom
load radius.
T019605E
A-9
Safety Rules Safety Rules
T03802E
Boom deflects
Load radius