Collapse zone

Area beneath a wall in which the wall is likely to land if it loses structural integrity

Curtain wall

Non-bearing exterior wall attached to the outside of a building with a rigid steel frame. Usually the front exterior wall of a building intended to provide a certain appearance

Gypsum

Fire resistant material used for gypsum plaster and wallboard

HVAC system

Mechanical system used to provide environmental control within a structure, and the equipment necessary to make it function; usually a single, integrated unit with a complex system of ducts throughout the building

Structural collapse

Structural failure of a building or any portion of it resulting from a fire, snow, wind, water, or damage from other forces

Veneered walls

Walls within a surface layer of attractive material laid over a base of a common material