Abstract
According to the result of analysis of 23 accidents related to tower cranes that have occurred over the past 6 years ('14~'19. 6) due to the increase in the use of remote controlled tower cranes, it found out 26 general tower cranes (72.2%) and 10 remote controlled tower cranes (27.8%) among the 36 fatal accidents. There were no accidents in 2018, but in the first half of 2019, the fatal accident rate of remote controlled tower cranes is increasing with two accidents resulting in three deaths. The purpose of this study is to Analyze adjustment effect of safety working manual on effect of the HARVEY's safety accident indirect cause theory -three causes (3E) of safety and disaster occurred by drivers in the remote controlled tower crane works. The research method is to conduct a survey of workers and stakeholders, and to find out what is the difference on the effect of three causes (3E) of independent variables to safety accident caused by controllers, which are dependent variables when using a safety work manual. For this, Sobel Test and Bootstrap verification were performed using the Jamovi statistical program. Results of analysis, using of the safety working manual was shown that there is a difference statistically on the effect of three causes (3E)-enforcement cause, engineering cause and educational cause- to safety accident caused by drivers. As survey results of whether the equipping and using of the safety working manual for the remote controlled tower crane, it found out that the manual utilization was very low because there is no manual in most construction sites, or workers did not know whether safety working manual is equipped. Through this study, it will be necessary to improve the utilization through spreading manuals to all construction sites as well as manual development. Forward, It is expected that safety working manual can be equipped on all construction sites that use remote controlled tower cranes and to help for safe work and prevention of accident and look forward to continuously leading to the development of safety working manual for construction machines.
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