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CPWR Technical Report: Analysis and Control of Crane and Aerial Lift Hazards PDF Version CPWR - The Center for Construction Research and Training
 

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David V. MacCollum

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Edited by Rowena Davis

of the The Hazard Information Foundation, Inc.

Table of Contents

Acknowledgments
Author's Note
Part 1: Abstract
Part 2: Equipment Overview
Part 2: Five Prominent Hazards
Part 2: Other Crane Hazards
Part 2: Aerial Lift Hazards
Part 3: Discussion
Part 3: Five Principles of Inherently Safer Design
Part 3: Incentives
Part 3: Conclusions
Appendix A Section 1: Powerline Contacts
Appendix A Section 2: Upset
Appendix A Section 3: Error-Provocative controls
Appendix A Section 4: Blind Zones
Appendix A Section 5: Unsafe Access
Appendix B: Other Crane Hazards
Appendix C: Other Aerial Lift Hazards
Bibliography

Appendix C: Litigated Cases of Aerial Lift Hazards

Appendix C, Section 1(a)

COURT AND CASE NUMBER: 319th Judicial District, Nueces County, TX #84- 7397-G

DATE COMPLAINT FILED: 1984

EQUIPMENT/FACILITY: Scissor lift

HAZARD: Upset

AVAILABLE HAZARD PREVENTION:

  • Even, hole free work surface
  • Outriggers extended

SUMMARY OF OCCURRENCE: An electrician broke his hip when a scissor lift that was extended 15 feet off the ground upset. The wheel of the lift fell into one of several 4 ft by 8 in holes. Outriggers were not extended.

Appendix C, Section 1(b)

COURT AND CASE NUMBER: 11th Judicial Circuit, Dade County FL #224243

DATE OF OCCURRENCE: January 22, 1989

DATE COMPLAINT FILED: January 1990

EQUIPMENT/FACILITY: Scissor lift

HAZARD: Upset

AVAILABLE HAZARD PREVENTION:

  • Automatic outriggers
  • Interlock to prevent lifting until outriggers are in place

SUMMARY OF OCCURRENCE: A worker was brain damaged when the personnel lift he was on upset from the wind.

Appendix C, Section 1(c)

COURT AND CASE NUMBER: Superior Court, 3rd Judicial District, Anchorage, AK 3AN-91-2875

DATE OF OCCURRENCE: April 12, 1989

DATE COMPLAINT FILED: 1991

EQUIPMENT/FACILITY: Scissor lift

HAZARD: Upset during transport

AVAILABLE HAZARD PREVENTION:

  • Warning system
  • Better designed trailer
  • ROPS/FOPS

SUMMARY OF OCCURRENCE: A worker’s leg was injured during the loading of a scissor lift onto a trailer used by the Anchorage school district. The trailer was on a slight incline and the ramp was not square. The worker was backing the scissor lift up onto the trailer and the lift tipped over onto his legs.

Appendix C, Section 1(d)

COURT AND CASE NUMBER: Unknown

DATE OF OCCURRENCE: December 13, 1976

EQUIPMENT/FACILITY: Scissor lift

HAZARD: Inadvertent activation of controls

AVAILABLE HAZARD PREVENTION:

  • Dust-proof controls

SUMMARY OF OCCURRENCE: The lift operator was crushed by lift actions caused by contamination of controls. The functionality of the control system was compromised by dust inherent to the plant in which he was working. Had the control and switching system been dust-proof the machine would have functioned as instructed.

 

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