Smoke Shaft 2 : A continuous shaft, extending the full height of a building, with openings at each level and a fan at the top; during a fire, the dampers on the fire floor open and the fan vents the combustion products
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}