Abstract
The air volume which is necessary for control the smoke at the time of fire is determined by meteorological conditions such as temperature, direction of wind, closing state of windows and so on, which is characteristic for individual building. Therefore, in order to decide a smoke control system that is optimum for a certain building, it is necessary that, by varying those conditions of the building, thereby an investigation whether the building is capable of enduring the aforementioned various conditions or not should be done. The air-flow calculation in a large-scale building requires much time ever though a computer is employed, so that it would be almost impossible in practice to calculate for all of the numerous conditions. Accordingly, the authors prepared a program of simplified calculation which enable to compute on the numerous conditions. The present paper shows six control systems as means of stairshafts or their lobbies free from smoke. Six control systems to keep the stairshafts and its lobby free from smoke are discussed and we can find some effective smoke control systems for high-rise building in them.
