According to the provisions of the "Code for Fire Protection Design of high-rise Civil Buildings", when the fire protection roller curtain including the temperature rise of the back fire surface is used as the fire resistance limit determination condition, the fire resistance limit is not less than 3 hours. The steel fire shutter is difficult to meet such requirements, therefore, many places require the use of super fire shutter. Therefore, the amount of steel fire retardant roller blinds is becoming less and less.



However, because the steel fire shutter also has its own advantages, therefore, although the amount of steel fire shutter will be less and less, it will still exist on the market, it may eventually be fixed at 10%-20% such a small market share, the main reason is that the steel fire shutter in the state of no need for fire, it can be used as an anti-theft door. For example, the shopping mall can use the fire curtain at the entrance and exit as an anti-theft door, and the cloth fire curtain can only prevent fire but not anti-theft.