The steel bridge construction project can be successful if the definition of project scope is in accordance with the requirements. WBS is a smalles work item and easily controlled. WBS standardization is very important because it will greatly affect the cost control. The purpose of this research is to develop WBS in steel bridges based on the regulation of the General Specification of Highways 2010 Revision 3 and Special Specification of Toll Roads 2017 from Toll Road Regulatory Agency (BPJT) for controlling project cost. The results of this study is we can get WBS standards by analyzing possible risks that may affect controlling project cost. So it is expected to assist the contractor in the cost control of steel bridge construction projects.