Construction Incidents Investigation Engineering Reports

This webpage includes forensic engineering investigation reports of catastrophic incidents conducted by the Occupational Safety and Health Administration (OSHA), Directorate of Construction – Office of Engineering Services. Many of these incidents resulted in one or more worker fatalities, and property loss, lawsuits, or settlements of millions of dollars. Each investigation was performed at the request of an OSHA field office or State Plan OSHA as part of an enforcement inspection. These reports may include professional opinions of the investigating engineer; incident root cause opinions; factual data; and findings.

These investigative reports were prepared to assist the OSHA field office or State Plan OSHA. The alleged violations of standards referenced in the reports are findings and recommendations of the investigating engineer to assist the requesting office. The violations and findings recommended in the report does not constitute an OSHA violation of a specific party named in the report. The OSHA field office or State Plan OSHA may issue the recommended violation; additional and/or different violations of standards to the appropriate party. The final resolution of the enforcement case may result in changes to the initial proposed alleged violation(s).

The intent of these reports is to help employers, workers, construction engineers, project managers, and regulatory bodies identify problems in construction design, project management, and management of field engineering changes. Hopefully, this information will help reduce future incidents, fatalities, and serious injuries.

The web-version of the report may not include all photographs, schematics, computations, tables, figures, and other non-text items. Otherwise, the text of each report is identical to the original report. The report is maintained as part of the OSHA enforcement case file in the appropriate Area Office or State Plan.

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Only selected reports are posted on this webpage. For assistance with any of the reports, figures or illustrations, please contact the Directorate of Construction at (202) 693-2020.

  • OSHA finds that structural engineers must specify the order and manner of replacing existing diagonals and strut members of cellular towers. Onsite judgement by workers engaged in retrofit of towers has often proven to be disastrous. (October 2018)
  • OSHA finds that the contractors and engineers should consider turbulent winds causing uplift and vortex in areas exposed to tropical storms and hurricane. OSHA recommends analysis based on Computational Fluid Dynamics (CFD) calculations. (September 2018)
  • OSHA finds that the contractor not laying the boom and jib in the face of impending wind in accord with the crane manufacturer's instruction caused the collapse of the crane. (July 2016)
  • OSHA finds that contractors must exhibit abundance of caution and supervision during dismantling of mast climbing platforms, not to overload the platforms causing failure of the mast. (August 2015)
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