The automated construction method has been regarded as an alternative way to decrease the dependency of skilled laborers and to improve the constructional condition for ensuring safety and increasing productivity of relevant processes. For applying an automated construction system and for the realization of its expected effectiveness, unavoidable changes in conventional details of materials and sub-components might be needed. Now, in Korea, a project to research an automated construction system for steel structures is ongoing, and an alternative detail for the column-girder joint has been suggested as a partial progress result. In this study, performances of the suggested detail were analyzed on the points of collision stress and installation time that are measured in the pilot project. From the result, the application of the specified detail can be considered to satisfy this requirement, related to the allowable stress of the structural steel, and to result in an effective improvement in productivity.