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The fire safety system at Daegu subway station had inherent problems from which many casualties came. The main problem areas include that fire safety system design wasn't consider fire scenario including fire size, fire growth rate, fuel type, and smoke production rate. The Subway cabin design also focused on convenience and low cost, rather than cabin safety, and fire performance. Under these circumstances a performance based fire safety design approach is essential in ensuring safety in subway stations. Performance-based design for subway station and platform would consider the problem of the interrelationship between safety level and cost, fire size of subway car, smoke production rate, and identifying smoke control zone along egress route. The study reviews fire size and smoke production rate from burning cabin as fuel to determine the scale of smoke management system in the egress route. This will assist in implementing a performance based safety design at subway stations including the platform.