This paper is intended to summarize findings from tensile test of carbon steel during fire and numerical analysis of partial factors for fire resistant design of steel girder bridge as a parameter reliability index. The specimens were rolled steels for welded structures. As parameters for evaluating, we have employed steel type and fire temperature. The numerical analysis of partial factors based on classical reliability theory. In conclusion, we confirmed that the decreasing inclination of steel strength is almost same as Eurocode. Furthermore, we calculated resistance coefficient based on tensile test under high temperature.
