LATTICE CRANES

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A presentation on the safety considerations and
procedures, statistics and data, major accidents,
and OSHA regulations, associated with lattice
cranes.


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Safety Concerns

• Overhead and falling object hazards
• Pinch points
• Faulty equipment
• Electrocution
• Improper loading
• Working from personnel platforms
• Lack of hazard assessment

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Guidelines for Safe Operation

• Daily inspections of equipment by operators
• Inspects components for wear and tear
• Replace slings and wire ropes if worn
• No one should ever be under a load

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Guidelines for Safe Operation

• Operator should be aware of others at all times
• Only one person should give hand signals
• Never exceed load limits

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Guidelines for Safe Operation

• Employees should be properly trained in rigging
  and crane safety
• Never ride a load
• Operator should make slow smooth directional
  movement

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Guidelines for Safe Operation

• All parties should be involved and aware the
  potential hazards
• Be aware of power lines
• Fully seat hooks and remove slack before making a
  pick
• Wear gloves when rigging, and of course hardhat,
  safety glasses, and safety boots

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Guidelines for Safe Operation

• Locate hook directly above the pick point to
  avoid swinging
• Stay clear of tracks, especially when crane is
  walking
• Be aware of hazards on routes when during
  transportation
• Operator should never leave the controls unless
  the crane is dogged off
• FOLLOW OSHA REQULATIONS

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Inspection Checklist

• Check for loose or missing parts
• Check the block assembly
• Check wire ropes for broken strands or reduced
  diameters
• Check for wear and tear on slings

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Statistics


Crane Safety on Construction Sites  By Dwight B.
Sal
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Statistics


Crane Safety on Construction Sites  By Dwight B.
Sal
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Statistics


Crane Safety on Construction Sites  By Dwight B.
Sal
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Statistics


http//www.cdc.gov/niosh/docs/2006-142/injury
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Statistics


http//www.cdc.gov/niosh/docs/2006-142/injury
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Related Accidents

• July 14, 1999
• Building a stadium
• 3 Ironworkers died
• Hoisting a 450 ton roof section
• No record of wind statistics
• Weight of the hoisted load, side loads from wind,
  out-of-level ground conditions, and the swinging
  motion as the crane moved sideways combined to
  tip the crane

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Related Accidents

• October 13, 1999
• 50 yr old carpenter killed
• Struck by 1 cy concrete bucket
• Operator with 26 yrs experience
• False LMI readings

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Related Accidents

• December 14, 2000
• Victim had just exited a personnel platform onto
  a barge
• From the above bridge, the boom came off the rig
  and fell on the victim
• Malfunction in the boom sheave

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Related Accidents

• March 17, 1997
• Master mechanic injured
• Dismantling the crane for transport
• Boom supported by pendants
• Removed the pin connections while underneath it.

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OSHA Regulations

• Subpart N of OSHA 1926
• 1926.550(a)(2)
• Rated load capacities, and recommended operating
  speeds, special hazard warnings, or instruction,
  shall be conspicuously posted on all equipment.
  Instructions or warnings shall be visible to the
  operator while he is at his control station.
• 1926.550(a)(4)
• Hand signals to crane and derrick operators shall
  be those prescribed by the applicable ANSI
  standard for the type of crane in use. An
  illustration of the signals shall be posted at
  the job site.

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OSHA Regulations

• List of Key Points in Subpart N of OSHA 1926
• (a)
• General Requirements
• (7)(i)(ii)(iii) and (iv)
• (12)
• (14) (i) and (ii)
• (15) (i)(ii)(iii)(iv) and (vi)
• (a)(19)
• (g) Crane or derrick suspended personnel
  platforms
• (2) General requirements
• (3) Cranes and derricks
• A B D E
• A C

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OSHA Regulations

• List of Key Points in Subpart N of OSHA 1926
• (a)
• (4) Personnel platforms
• Platform specifications
• A C D F
• (iv)Rigging
• C
• (5) Trial lift, inspections and proof testing
• (vi)
• (g)
• (6) Work practices
• (i) (iii) (iv) (v) (vi) and (vii)

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OSHA Regulations

• List of Key Points in Subpart N of OSHA 1926
• 1926.552
• 1926.552 Material hoists, personnel hoists, and
  elevators
• (a) General requirements
• (3) (i) (ii) (iii) and (iv)
• (b) Material hoists
• (1) (i) and (ii)

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References

• www.craneaccidents.com
• OSHA 1926
• www.osha.gov

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