National Crane Published 12-21-2011 CTRL #050-09 2-3
1300A OPERATOR’S MANUAL SAFETY PRECAUTIONS
Controls and design may vary from crane to crane; therefore,
it is important that you have specific training on the particular
crane you will be operating.
Training is ESSENTIAL for proper crane operation. Never
jeopardize your own well-being or that of others by
attempting to operate a crane on which you have not been
trained.
You must be mentally and physically fit to operate a crane.
Never attempt to operate a crane while under the influence
of medication, narcotics, or alcohol. Any type of drug could
impair physical, visual and mental reactions, and
capabilities.
As operator of this crane, you are granted the authority to
stop and refuse to lift loads until safety is assured.
OPERATIONAL AIDS
Manitowoc remains committed to providing reliable products
that enable users and operators to safely lift and position
loads. Manitowoc has been an industry leader in the
incorporation of operational aids into the design of its cranes.
Federal law requires that cranes be properly maintained and
kept in good working condition. The manuals that Manitowoc
provides that are specific for each crane and the
manufacturer’s manuals for the operational aids shall be
followed. If an operational aid should fail to work properly, the
crane user or owner must assure that repair or recalibration
is accomplished as soon as is reasonably possible. If
immediate repair or recalibration of an operational aid is not
possible and there are exceptional circumstances which
justify continued short-term use of the crane when
operational aids are inoperative or malfunctioning, the
following requirements shall apply for continued use or
shutdown of the crane:
• Steps shall be taken to schedule repairs and
recalibration immediately. The operational aids shall be
put back into service as soon as replacement parts, if
required, are available and the repairs and recalibration
can be carried out. Every reasonable effort must be
made to expedite repairs and recalibration.
• When a Load Indicator, Rated Capacity Indicator, or
Rated Capacity Limiter is inoperative or malfunctioning,
the designated person responsible for supervising the
lifting operations shall establish procedures for
determining load weights and shall ascertain that the
weight of the load does not exceed the crane ratings at
the radius where the load is to be handled.
• When a Boom Angle or Radius Indicator is inoperative
or malfunctioning, the radius or boom angle shall be
determined by measurement.
• When an Anti-Block Device, Two-Blocking Damage
Prevention or Two-Block Warning Device is inoperative
or malfunctioning, the designated person responsible for
supervising the lifting operations shall establish
procedures, such as assigning an additional signal
person to furnish equivalent protection. This does not
apply when lifting personnel in load-line supported
personnel platforms. Personnel shall not be lifted when
anti-two-block devices are not functioning properly.
• When a Boom Length Indicator is inoperative or
malfunctioning, the designated person responsible for
supervising the lifting operations shall establish the
boom lengths at which the lift will be made by actual
measurements or marking on the boom.
• When a Level Indicator is inoperative or malfunctioning,
other means shall be used to level the crane.
Load Moment Indication (LMI) Systems (If
Equipped)
Your crane may be equipped with an LMI system which is
intended to aid the operator. Test daily for proper operation.
Never interfere with the proper functioning of operational
aids or warning devices.
Under no condition should it be relied upon to replace the
use of Load Charts and operating instructions. Sole reliance
upon these electronic aids in place of good operating
practices can cause an accident.
Know the weight of all loads and always check the capacity
of the crane as shown on the Load Chart before making any
lifts.
NEVER exceed the rated capacity shown on the Load Chart.
Always check the Load Chart to ensure the load to be lifted
at the desired radius is within the rated capacity of the crane.
For detailed information concerning the operation and
maintenance of the load moment indicating system installed
on the crane, see the manufacturer’s manual supplied with
the crane.
Anti-Two-Blocking Device
This crane should have a functional Anti-Two-Block and
Control Lock-Out System. Test daily for proper operation.
Two-blocking occurs when the load block (hook block,
headache ball, rigging, etc.) comes into physical contact with
the boom (boom nose, sheaves, boom extension, etc.). Two-
blocking can cause hoist lines (wire rope), rigging, reeving,
and other components to become highly stressed and
overloaded in which case the wire rope may fail allowing the
load, block, etc. to free fall.
Two-blocking is more likely to occur when both the main and
auxiliary hoist lines are reeved over the main boom nose and
boom extension nose respectively. An operator,
concentrating on the specific line being used, may telescope
or lower the boom allowing the other hoist line attachment to
contact the boom or boom extension nose, thus causing
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