Draft Stop 1 : (1) A fire stop. (2) An obstruction placed in an air passage to prevent the passage of flames up or across a building. See also: Draft Curtain
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}