Analysis of safety cost structure in infrastructure project of precast of precast concrete bridge based on Work Breakdown Structure (WBS)

The Indonesian construction industry has increased due to the policy of infrastructure projects acceleration. Construction is a dangerous industry that often takes casualties. In recent years there have been many accidents in the precast bridge projects, which have caused moral and material losses, projects were stopped and delayed. Separate budgets that are not specifically prepared in implementing the Occupational Safety and Health Management System (OHSMS) is one of the causes of the poor implementation of OHSMS and create high rates of accidents. Thus, the financing of OHSMS was taken from the project budget, which led to a reduction in the profits. The aims of the study are determining the work breakdown structure (WBS) in precast bridge project, identifying hazards and risks, developing safety plans, identifying safey costs components and calculating of safety cost. This research is a survey research with respondents of experts in construction safety, descriptive analysis is used to determine variables. A case study approach is also used to calculate safety costs. The results of this study are the precast bridges standardized WBS, safety plan to each hazards and activity, finding the safety costs components based on WBS, and the percentage of total safety cost Kundur Bridge is 3,21%.