The findings were summarized as follows. The safety check by manufacturer showed that 6 of 13 companies are over the average occurrence of defects. It was expected that there would be a difference between manufacturing technology capability and production system of each manufacturer. Consequently, manufacturers should institutionally improve and strengthen certification items for the upward standardization of safety certification before factory. Second, the safety check by year showed that the results of this study accord with those of previous studies on defect time. Consequently, manufacturers should classify the 3-year-old equipment for vehicle-mounted MEWP into a special check subject to do a nondestructive test according to proven results, and also reflect the test in a safety test system to do regular preventive activities of equipment defects. Third, the safety check by part showed that the boom and outrigger parts of vehicle-mounted MEWP have the most defects. Stress concentration resulted in defects as the boom part was most frequently operated in the structural parts for a real work. To prevent this, it is suitable to improve the hardness of boom materials. The outrigger part needs improvement in safety devices with materials. As an outrigger supports the overturning moment of equipment, it is most affected by its load based on the operating radius, resulting in fatigue crack.

Forklift truck is one of the dangerous machines which causes the fatal accidents most frequently. The causes of fatalities by forklift from 2008 to 2011 were analyzed. Crushing the operator when tipping over or falling off a truck were the major causes of death in this study. The purpose of this study is to show measures from the engineering point of view to prevent the forklift truck accidents. In order for that, the domestic requirement for forklift safety was compared with those of foreign and international standards. The manufacturers' opinion was also collected regarding to improve the forklift safety. Several measures were suggested in order to prevent fatalities caused by forklift.

경제성장과 더불어 에너지에 대한 수요와 1인당 에너지 소비량은 증가 추세를 나타내고 있다. 특히 가스는 이용의 편리성, 저공해성, 열효율성 등으로 인해 1970년경 도입된 이래로 1997년도의 소비량을 보면 프로판가스(LPG)는 116.6배, 부탄가스는 326.9배, 도시가스(LNG)는 약 5.262배가 증가하였으며, 총에너지 소비중 가스가 차지하는 비중 역시 높아지고 있다. 그러나 이러한 가스 소비량의 급격한 증가와 함께 가스소비 행태의 변화, 가스 사용처의 다양화 등은 빈번한 가스사고의 발생을 초래하고 있으며, 가스안전 진단기구의 설치 및 가스안전 관리대책의 시행, 관련 규제법규의 제정시행 및 교육홍보 제도의 활발한 시행에도 불구하고 그치지 않고 있고, 사고 발생시는 그 특수성으로 인해 대형화하고 있다. 본 연구에서는 우리 나라의 가스소비 증가추세와 함께 안전관리제도 및 전담기구의 안전관련 업무내용을 검토해 보고, 또 가스사고의 원인별, 사용처별 사고실태 및 피해현황을 파악하고, 특히 프로판가스(LPG)의 시설별 사고실태 및 문제점을 사례별로 분석하였다. 한편으로는 일본의 가스안전 관리체계와 가스사고 실태를 파악해 보고 새로운 가스 안전대책과 개선동향을 파악하였으며, 우리나라 가스안전 관리대책의 개선과 안전성 향상방안을 제시하고자 하였다.