Prediction of smoke movement in atria: Part II Application to smoke management.

In recent years, approaches to smoke management in atria have been introduced into many codes and engineering guides. This paper presents information that can be used for design analysis of atrium smoke management systems. Various approaches to manage smoke in atria are discussed Often a hot layer of air forms under the ceiling of an atrium, and this hot layer can prevent smoke from reaching the ceiling. A method is discussed for dealing with smoke detection when such a hot air layer prevents smoke from reaching the ceiling. Commissioning is needed to ensure that smoke control systems will function as intended during fire situations. Commissioning efforts should start before design and extend until ·maintenance system modifications after construction are finished Research is needed concerning (1) the use of airflow for smoke control between the atrium and communicating spaces and (2) the depth of the smoke layer required to prevent atrium exhaust from pulling air from the lower layer.