2-22 Published 9-26-2018 Control # 646-02
SAFETY PRECAUTIONS NTC55 OPERATOR MANUAL
• The panel shall be lifted so that the hoist lines are in line
with the crane.
• The load shall be controlled to prevent rotation of the
load and to ensure the load stays in line with the boom.
• The load must be balanced with the auxiliary: load line
not taking more than half the load at any time during the
lift. The RCL will not be providing coverage for the line
pull of the auxiliary hoist line.
• The effect of wind loads on the crane and panel shall be
taken into consideration. Operations shall be halted if
the wind can cause a loss of control in handling the load.
• The main hoist line shall be used to raise the panel into
the vertical position.
Ensure that all personnel working on and around the crane
are properly trained and thoroughly familiar with operational
functions of the crane and safe operating and work practices.
Personnel should be thoroughly familiar with regulations and
standards governing cranes and their operation. Work
practices may vary slightly between government regulations,
industry standards, local and job-site rules and employer
policies so a thorough knowledge of and compliance with all
relevant work rules is necessary.
PILE DRIVING AND EXTRACTING
Pile driving and extracting are applications approved by
National Crane, provided all equipment is operated within
factory guidelines. The following operating requirements
must be used during pile driving and extracting with a
National mobile hydraulic crane:
Pile driving and pile extraction using a mobile crane
introduces many variable and unknown factors that must be
considered when using a crane for this application. Because
of these factors, discretion must be exercised when pile
driving or pile extraction is being considered.
It is not the intention of National Crane to recommend
specific types or makes of pile driving and pile extraction
equipment, but rather to advise of the operational
requirements to help avoid the detrimental effects that pile
driving and pile extraction can have on the crane.
In addition to the operating requirements that are detailed in
the operating manuals and on the load capacity chart, pile
driving and extracting operations are approved by National
Crane, provided all guidelines outlined below are followed:
• All pile driving and extracting operations shall be
restricted to fully extended outriggers with all tires clear
of the ground.
• The combined weight of the driver or extractor, piling,
leads, attachments, etc., shall not exceed 80% of the
published load chart values for on-outriggers operation.
• The pile driver or pile extractor and attachments shall be
kept clear of the boom nose at all times.
• The pile driver and piling shall be suspended from a
hoist cable with sufficient line speed to meet or exceed
the rate of descent of the driver and piling to preclude
impact loading or vibration from being induced into the
boom and crane structure.
• Pile driving or extracting shall be restricted to over the
main boom only and shall not be permitted over a boom
extension.
• Pile extraction using only the crane’s hoist line is unsafe
and not permitted since load values cannot be
accurately determined. Only pile extraction devices that
do not transmit vibration or shock loading into the crane
are permitted. All possible precautionary measures shall
be taken to prevent shock loads or vibration from being
imposed on crane components, either directly through
the hoist cable or indirectly from ground borne vibration.
• The load lines shall be kept vertical at all times during
pile driving and pile extraction operations.
• The operator and other personnel associated with the
pile driving and pile extraction operation shall have read
and understood all safety standards applicable to crane
operations as well as being thoroughly trained in the
safe operation of pile driving and extracting equipment.
Crane Equipment
• Hoists shall be equipped with a cable follower to aid in
proper spooling of cable.
• All cable retainer pins and cable guides/retainers shall
be in place.
• All boom extensions must be removed from the machine
before pile driving or extraction begins.
• All hoist hooks shall be equipped with a positive locking
latch.
Crane Inspection
• In addition to the crane's frequent and periodic
inspections, dated daily records shall be maintained
showing inspections were performed on the crane
during the time it was used for pile driving or extraction.
• All anti-two block warning devices and RCL systems
shall be inspected daily and verified to be functional.
• All areas of the crane subject to fatigue shall be
inspected monthly, and before the crane is to return to
lifting service.
• The boom shall be inspected daily to ensure all wear
pads remain in place. Cranes which utilize pinned boom
sections shall be inspected daily to ensure the pinning
mechanism operates properly and to check for undue
wear at the pins and pinning plates.
• The hoist cable shall be inspected daily to ensure no
chafing or wear is occurring.
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