Abstract of Special Research Report (SRR-No.22)
National Institute of Occupational Safety and Health, Japan
Ergonomic Studies on Analyzing the Risk of Accidental Falls in High-Rise Construction Works
|Yoshimasa KAWAJIRI, Yoshimi SUZUKI and Hisao NAGATA|
: Many accidents, caused by falls, are occurring in many workplaces. Especially in the construction industries, accidents caused by falls reckoned for more than 30% of casualties and 40% of fatal accidents in 1998.
A Questionnaire Survey to Construction Workers on Human Factors Concerning Falling-Accident
|Yoshimi SUZUKI, Shin-nosuke USUI, Yoshiyuki EGAWA and Takuro SHOJI|
: In order to establish the ergonomic countermeasures against falling-accidents in construction works, a questionnaire survey to construction workers was carried out. To approach the latent factors concerning falling accident in construction work sites, the questionnaire was focused on the following three points; non-taking or non-using safety belt, opening/handrail and insufficient information. Statistical analyses were made on 817 subjects which were obtained by this questionnaire survey.
An Analysis of Physiological and Psychological Workload for Workmen on Scaffolding
|Yoshiyuki EGAWA and Shin-nosuke USUI|
: In Japan, the number of deaths in construction work is reckoned 794 victims in 1999 and 37% of these victims were caused by falling from high elevated work place like scaffoldings. So, in order to establish the ergonomic countermeasures against these falling accidents in construction work, an analysis of physiological and psychological workload for workmen on scaffolding was carried out.
Working Limits and Safety Limits in Regards to Accidental Falls for Wind-Induced Vibration during High-Rise Construction Work
|Katsutoshi OHDO and Hisao NAGATA|
: During the construction of high-rise structures, weather has a strong influence on work efficiency and safety. Especially, bridge pylons under construction are likely to vibrate due to winds even less than 10 m/s, which is a widely used criterion for suspension of construction work in Japan. In fact, at a site workers, who were welding, felt it difficult to work due to wind-induced vibration and construction work had to be interrupted. Although these problems are recognized there are no construction work efficiency standards or even safety standards for working in wind-induced low-frequency motion, particularly in regards to accidental falls.
Sliding Properties on Pitched Roofing Surfaces
|Hisao NAGATA, Seiji TAKANASHI and Yoshimasa KAWAJIRI|
: A lot of occupational accidents caused by falls are occurring especially in the construction industries. According to statistics of occupational accidents of the year 1998, 43% of fatal accidents in the construction industries in Japan are caused by falls from roofs, scaffolding, ladders, eaves, girders etc. The ratio of fatal falls has been gradually increasing year by year. The wooden house construction sectors have more accidents than other sectors.