Folio 1113-5
SAFE OPERATING PRACTICES
d. Lock the upperworks against rotation except when it
is necessary to negotiate a turn, and then only when
the operator is seated at the controls or the boom is
supported on a dolly.
e. Lash or otherwise restrain unused hooks so they
cannot swing freely.
4. Before traveling with a load, the operator shall take the
following additional precautions:
a. A designated person shall be responsible for
operation. Decisions such as necessity to reduce
crane ratings, load position, boom position, ground
support, and speed of movements shall be in
accordance with the designated person’s decision.
b. Maintain specified tire pressures (truck cranes).
c. Avoid sudden starts and stops. Use taglines or other
restraints to control the position of the load.
Holding Load
When a load is suspended, the operator shall take the
following precautions:
1. Not leave his/her position at the controls.
2. Not allow personnel to stand or pass under the load.
3. Move all controls to off, apply all drum brakes, engage
the boom hoist pawl, and apply the swing and travel
brakes or locks.
SIGNALS
1. Signals to the operator shall be in accordance with the
standard signals shown on Drawing 184679 (in
Operating Controls section of Service or Operator’s
Manual) unless communications equipment (telephone,
radio, etc.) is used.
2. All signals shall be easily understood by the operator at
all times. The operator shall not respond to any signals
which are not clearly understood.
3. For operations not covered on Drawing 184679 or for
special situations, additional signals may be required. In
those cases, the signals used shall be agreed upon in
advance by the operator and signal person. Signals
used shall not conflict with or have the potential to be
confused with the standard signals.
4. When it is necessary to give instructions to the operator
(other than those established by signal system), all
crane motions shall be stopped.
5. The signal person shall:
a. Be qualified by experience with crane operations
and thoroughly familiar with the standard signals.
b. Be positioned in clear view of the operator. The
signal person’s position should give him or her a
clear view of the load, the crane, and the operating
area.
c. Direct the load so it does not pass over personnel.
d. Keep unnecessary personnel out of the crane’s
operating area.
6. When moving the crane, the following audible signals
shall be used:
a. STOP - one audible signal.
b. GO AHEAD - two audible signals.
c. BACK UP - three audible signals.
OPERATIONAL AIDS
When operational aids are inoperative or malfunctioning, the
following steps shall be taken to ensure safe continued
operation of the crane.
1. Steps shall be taken to schedule repairs and calibration
immediately. Operational aids shall be put back into
service as soon as replacement parts, if required, are
available and repairs and calibration can be carried out.
Every reasonable effort must be made to expedite
repairs and calibration.
2. When load indicator or load moment indicator/
limiter is inoperative or malfunctioning, the qualified
person directing the lift shall establish procedures for
determining load weights and shall make sure that the
weight of the load does not exceed the crane rating at
the radius where the load is handled.
3. When boom angle or radius indicator is inoperative or
malfunctioning, radius or boom angle shall be
determined by measurement (i.e. measure radius with
tape measure; measure boom angle with a protractor-
level on centerline of boom).
4. When boom or jib angle limiter (automatic boom or
jib stop) is inoperative or malfunctioning, the qualified
person directing the lift shall make sure maximum boom
angle/radius specified on capacity chart for load being
handled is not exceed. Radius and boom angle shall be
determined by measurement (i.e. measure radius with
tape measure; measure angle with a protractor-level on
centerline of boom).
5. When anti-two-block device is inoperative or
malfunctioning, the qualified person directing the lift
shall establish procedures to furnish equivalent
protection (i.e. assign an additional signal person to
observe distance between load and boom or jib point).
This practice does not apply when lifting personnel in
load line supported baskets. Personnel shall not be lifted
in load line supported baskets when anti-two-block
devices are not functioning properly.
6. When level indicator is inoperative or malfunctioning,
other means shall be used to level the crane within the
limits specified on the capacity chart (i.e. level crane
using a carpenter level on rotating bed).
7. When boom length indicator is inoperative or
malfunctioning, the qualified person directing the lift
shall establish the boom length at which the lift will be
made by actual measurement and marking of the boom.
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