Work Breakdown Structure (WBS) is a breakdown of deliverables and project work into smaller components that can be better managed. In fact, bridge construction projects in Indonesia are still many that are not in accordance with the planning in terms of scheduling. Therefore, the development of risk-based WBS Standardization is proposed for planning schedule of Steel Bridge work. The research consists of several stages with qualitative risk analysis method. The results show that WBS standard consists of 6 levels, with the dominant risk variable on project time performance, in which risk responses are recommended to develop standardized WBS.