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Curtain wall is a term used to describe a building façade which does not carry any dead load from the building other than its own dead load. These loads are transferred to the main building structure through connections at floors or columns of the building. A curtain wall is designed to resist air and water infiltration, wind forces acting on the building, seismic forces, and its own dead load forces.
There are over 300 high-rise buildings in Fairfax County and with new development around future metro stations, there are many more planned. the vast majority of our highrises are built using curtain wall construction.
The first alarm assignment on a high-rise fire is designed to cover the first essential positions with the understanding that a confirmed fire will get at least a 2nd alarm.
The 4th due engine and the 2nd due truck on the 1st alarm are assigned to go to the floor above the fire. Discuss the tactics expected of these two units and why knowing the location of the fire on the fire floor is important to the operations on the floor above as it relates to curtain wall construction. Discuss also just what a curtain wall really is, how the exterior walls are attached, how fire can extend, and where checking for extension needs to occur.
(Courtesy of Deputy Fire Chief Jeff Coffman)