Overview
Operating engineers, workers who operate cranes, bulldozers, excavators, and other heavy equipment, faced asbestos exposure from equipment components and work environments. Equipment brakes, clutches, and HVAC systems contained asbestos, while construction and industrial job sites exposed operators to ambient asbestos fibers.
Asbestos Exposure Sources
| Exposure Source | Description | Exposure Level |
|---|---|---|
| Equipment brakes | Crane and equipment braking systems | Moderate |
| Clutch components | Power transmission systems | Moderate |
| Cab insulation | Operator cab heat/sound insulation | Low-Moderate |
| Job site exposure | Working on construction sites | Variable |
| Building systems | Stationary equipment operation | High |
How Operating Engineers Were Exposed
Equipment Exposure
Heavy equipment contained asbestos in:
- Brake drums and shoes
- Clutch plates and facings
- Sound and heat insulation
- Hydraulic system components
Job Site Exposure
Operating engineers worked on sites where asbestos was disturbed:
- Construction sites with spray insulation application
- Demolition of buildings with asbestos materials
- Industrial facilities with asbestos insulation
Stationary Engineers
Operating engineers who operated building systems faced high exposure:
- Boiler operation in mechanical rooms
- HVAC system operation and maintenance
- Building heating and cooling systems
Stationary operating engineers who worked in building mechanical rooms faced particularly high exposure from asbestos-insulated boilers, pipes, and HVAC equipment.
Work Environments
Operating engineers ran equipment on construction sites, inside power plants servicing turbine and boiler equipment, in commercial building mechanical rooms, at shipyards working cranes and hoists, and on demolition jobs tearing buildings down. Between 1940 and 1980, stationary engineers in Pennsylvania, New York, and Ohio power plants hit the heaviest exposures from Johns Manville and Owens Corning insulation wrapped around the equipment they maintained.
Related Occupations
Operating engineers worked alongside:
- Laborers, General construction
- Ironworkers, Structural steel
- Demolition workers, Building demolition
- Maintenance workers, Building systems
- Boilermakers, Boiler operation
Health Consequences
Operating engineers face elevated risk of mesothelioma, a cancer of the chest or abdominal lining; asbestosis, a progressive scarring of the lungs; lung cancer, with risk multiplied among smokers; and pleural disease that thickens the lining around the lungs.
Legal Options
Operating engineers diagnosed with mesothelioma typically pursue several tracks in parallel. Equipment and building-material manufacturers such as Johns Manville, Owens Corning, and General Electric established asbestos trust funds through bankruptcy reorganization. Trust claims often run alongside product-liability suits against solvent equipment manufacturers, premises-liability claims against building owners, VA benefits for military service exposure, and workers’ compensation through a former employer.