<p>This paper proposes a standardized data- and model-driven digital engineering framework for steel girders based on an information delivery schema. The proposed framework digitizes designer-defined geometric information. It ensures seamless integration across project phases by linking quantity takeoff at the design stage to the automatic generation of shop drawings for fabrication. Furthermore, it supports a model-driven part comparison system and enables digital pre-assembly through the use of an updated digital model throughout the life cycle. Through the model-driven integration of design, manufacturing, and assembly, rapid digital transformation is achieved by automating processes that are traditionally performed manually in steel girder projects. This benefit becomes particularly evident when frequent design changes occur or when the framework is applied to similar projects. The effectiveness of the proposed methodology is demonstrated through a comparative evaluation with conventional practices based on three bridge projects scheduled for construction. The results indicate that the proposed approach provides a more efficient and systematic workflow. By employing the information delivery system, designers can accumulate and reuse life-cycle data to continuously refine future designs. This ultimately establishes a data-driven environment that supports design for manufacturing and assembly.</p>