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This paper proposes a basic direction for building systems designs based on scientific methods of quantitative evaluation in order to ensure human safety in building fires. Herein are described the position of the smoke control system as a subsystem of the whole system and the methods of designing the subsystem. Design of the subsystem is intended to produce a rational smoke control system best suited to each individual building based on computer simulation predictions of smoke flow or pressure distribution in the building. An outline of calculations on flowrate and pressure, concentration of smoke and gases, and thermal conditions is given. Calculations are divided into three steps according to the required level of accuracy, and these steps may be used appropriately, depending on specific goals. As an example of their application, the author demonstrates the design of a simplified smoke control system method, showing that it can provide simple, quantitative evaluation of the effectiveness of various smoke control systems under different conditions.
fires, fire safety, smoke, ventilation
Chief of Fire Research Section, Building Research Institute, Tokyo,