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					Crane Hand Signals

                  USA




   P bar Y Safety Consultants Alberta Canada
            Three Things first
• Before you raise have you done a critical lift
  sheet for every load and is it written down
• Have you Done a pre-job hazard assessment
• AND THE BIG QUESTION IS WHERE IS THE
  POWER LINE




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POWER LINES




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                                  Could you get within 20
                                    feet of power line?

                      YES                                                     NO

Option #1
Deenergize &
Ground
                                                                            No further
                                     Encroachment Prevention
                                                                             action
Option #2                                   Measures
20-foot                                 (Equipment Operations)
clearance                   • Planning meeting
                            • If tag lines used Non-conductive
Option #3                   • Elevated warning lines, barricade or
Ask Utility for             line of signs
Voltage and
Use Table A                       •PLUS (Choose one):
(with minimum
clearance distance)         • Proximity alarm, spotter, warning device,
                            range limiter, or insulating link


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Table A – Minimum Clearance Distances
Voltage (nominal, kV,               Minimum clearance
 alternating current)                 distance (feet)
       up to 50                                    10
    over 50 to 200                                 15
   over 200 to 350                                 20
   over 350 to 500                                 25
   over 500 to 750                                 35
   over 750 to 1000                                45
      over 1000                        (as established by the power line
                                       owner/operator or registered
                                       professional engineer who is a
                                       qualified person with respect to
                                       electrical power transmission and
                                       distribution)
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       WORKER PARTICIPATION
• Training
  – Workers must be trained to recognize and avoid
    hazards.
  – Workers must understand this training
     • Provided in a manner they understand
        – Oral/written training
     • Provided in a language they understand
        – Some Spanish language materials are already available
          through OSHA



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                       SIGNALS
                                         • Signal person –
• Signal Types:
                                           when required:
  – Hand, voice,
    audible or “new”                            –      Point of operation not
  – Only time an                                       in full view of operator
    operator can use
    a cell phone while                          –      View of direction of
    lifting (but must                                  travel is obstructed
    be hands free)
                                                –      Site-specific safety
                                                       concerns



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           SIGNAL PERSON
• Qualification Requirements:
  – Know & understand signals

  – Competent in using signals

  – Basic understanding of crane operation

  – Verbal or written test plus practical test

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    KEEPING CLEAR OF THE LOAD

• When workers must be in the fall zone to
  handle a load, the load must be rigged by a
  qualified rigger.




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  Universal Hand and Arm Signals

• Following are meanings of hand and arm
  signals.
• Used in all crane operations.
• Operator and ground guide must be familiar
  with:
  – Signals
  – Interpretation



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                Hand Signals
• It is required that a poster be posted at the
  jobsite with an illustration of the hand signals
  that every operator and personnel working
  with or around cranes must know.
• Hand signals for crane and derrick operators
  should be those set by the American National
  Standard Institute customized for the type of
  crane in use.

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                 Hoist Up




Forearm vertical, forefinger pointing up,
move hand in small horizontal circle.
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        Hoist Down




Arm extended downward, forefinger
pointing down, move hand in small
horizontal circle.
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  Main Hoist




  Tap fist on head, then
  use regular signals.
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   Auxiliary Hoist




Tap elbow with one hand,
then use regular signals
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    Raise Boom




Arm extended, fingers closed,
thumb pointing upward.
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  Lower Boom




Arm extended fingers closed,
thumb pointing downward.
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                    Move Slowly

Hoist Slowly
shown




          Use one hand to give any motion signal.
          Place other hand motionless in front of
          hand giving motion signal.
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       Raise Boom/Lower Load




Arm extended, thumb pointing up, flex fingers
in and out as long as load movement is desired.
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    Lower Boom/Raise Load




Arm extended, thumb pointing down, flex
fingers in and out as long as load movement
is desired.
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                Swing




Arm extended, point with finger in
direction of swing of boom.
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                      Stop




Arm extended, palm down, move arm
back and forth horizontally
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       Emergency Stop




Both arms extended, palms down, move
arms back and forth horizontally

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                       Travel




Arm extended forward, hand open and slightly
raised, make pushing motion in direction of
travel.
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   Dog Everything




Clasp hands in front of body.

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         Extend Boom




Both fists in front of body with thumbs
pointing outward.
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         Retract Boom




Both fists in front of body with thumbs
pointing toward each other.
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           Extend Boom




One hand signal. One fist in front of
chest with thumb tapping chest.
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               Retract Boom




One hand signal. One fist in front of chest, thumb
pointing outward and heel of fist tapping chest.
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            Questions to Class
Q) Forearm vertical, forefinger pointing
  up,moving hand in small horizontal circle.
A) Hoist
Q) Arm extended, fingers closed, thumb
  pointing downward.
A) Lower Boom



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          Introduction to Cranes
• Hoist - A hoist is used to lift and lower the load.
• Boom - A boom is an incline spar, strut, or other long
  member supporting the hoisting tackle.
• Boom Stops - Boom stops are devices used to limit
  the angle of the boom at its highest position.
• Boom Angle Indicator - A boom angle indicator is an
  accessory device that measures the angle of the
  centerline of the boom base section to horizontal.




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         Introduction to Cranes
• Block - Blocks are sheaves or grooved pulleys
  in a frame with the hook, eye, and strap.
• Jib - A jib is an extension attached to the
  boom point which provides added boom
  length for lifting specified loads.
• Load - A load is the weight of the object being
  lifted by the crane. This weight includes the
  load block and hook, wire rope, rigging, boom
  attachments, and ancillary attachments.
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Who’s At Risk
         • Among those who are at risk in crane
           accidents are the crane operators and
           anyone working at the crane site.
         • Crane operators and all personnel
           working with cranes must receive proper
           training. They also must maintain regular
           equipment inspections to identify any
           existing or potentially hazardous
           conditions. In addition, precautionary
           maintenance must be performed as
           required by the crane manufacturer
           and/or supplier to ensure the crane is
           operating safely.



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           Planning for Crane Usage
Check and inspection procedures:
• Level the crane and ensure the support surface is firm and able to support
   the load.
• Contact power line owners to determine any and all precautions. Know
   the location and voltage of the over head power lines before beginning
   work.
• Know the basic crane capacities, limitations, and job site restrictions, such
   as the location of power lines, unstable soil, or high winds.
• Make other personnel aware of hoisting activities.
• Barricade areas within the swing radius.
• Ensure that there is proper maintenance and inspections.
• Determine the safe areas to store materials and place machinery.




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                             Lifting Principles
There are four basic principles that cover a
crane’s mobility and safety during lifting
operations. They are:
       – Center of Gravity.
       – Leverage.
       – Stability.
       – Structural Integrity.



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Alberta Canada
       WORKER PARTICIPATION
• Workers have a right to a safe and healthy
  workplace
• Workers have a right to report safety issues
  without fear of retaliation
• Workers may report safety concerns to OSHA
  at 1-800-321-OSHA



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posted:9/7/2011
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Description: worker safety