Building Separation Wall : A fire-resistance rated wall, having protected openings, which restricts the spread of fire and extends continuously from the foundation to or through the roof
William J. McHugh, Jr., Glossary of Firestop Terms (Article, Life Safety Digest magazine), Firestop Contractors International Association FCIA, Hillside, IL, USA 2010. http://www.fcia.org/articles/glossary.htm , (Firestop - Amer) {511}