Since cranes are a kind of complex human-machine systems, it is almost impossible to completely secure safety with current technologies. Therefore, managerial interventions to prevent human errors are needed for safely operating a crane. The Occupational Safety and Health law states that cabin-type crane operators should have crane drivers’ licence and crane-related operators (e.g., pendent-type crane operators, slinging workers) should take a special safety training. However, statistics on industrial accidents showed that fatalities due to crane accidents (185 accidents occurred during 2013~2017) were the highest among hazardous machinery and equipment. To effectively control the crane-related accidents, voices of crane workers need to be analyzed to investigate the current status. This study surveyed perceived causes of crane accidents and status of special safety training for crane workers of 387. The survey revealed that 24.3% of the respondents experienced crane accidents and 31.4% eye-witnessed crane accidents. 79% of the respondents pointed human errors such as improper crane operation and improper slinging as the first cause. Lastly, only 16.7% of the respondents took a professional special safety training; but the rest took lecture-based or incomplete education. The findings of the present study can be applied to improve crane-related policies and special safety training systems.

Abstract
1. 서 론
2. 연구 방법
    2.1 설문 조사 내용 및 대상
    2.2 데이터 분석 방법
3. 결 과
    3.1 크레인 작업자 현황
    3.2 크레인 위험성과 사고원인에 대한 인식
4. 토의 및 결론
5. References

• 이용석(울산대학교 산업경영공학과) | Yongseok Lee (Department of Industrial Engineering, University of Ulsan)
• 정기효(울산대학교 산업경영공학과) | Kihyo Jung (Department of Industrial Engineering, University of Ulsan) Corresponding Author