Steel is often used as an assembly of main structure such as columns and beams on external walls of buildings. Such steel structural members lose their structural function when the temperature of the steel rises due to spouting hot gas or radiation heating via openings upon fire in a neighboring compartment. This paper presents a calculation model for predicting temperature of steel structural members upon fire heating and proposes it as a practical tool for evaluation of fire resistance. This model also helps the practical prediction of temperature properties of steel structural members that local heating brings about.
