Firestopping Book Firestopping Book | Page 51

INSULATION The property by which a material resists heat transfer as a result of its low thermal conductivity. Insulating materials used in firestop systems must be stable at high temperatures to preserve their properties when exposed to fire. A typical example is a mineral wool made from fibers with a melting point well above the expected fire temperatures. Some Myths Compartmentation means Fire Door & Fire Wall? Compartmentation is a method by which buildings are divided into individual fire-resistance rated cells so that the spread of fire and smoke can be limited to an individual cell and all other cells of the buildings remain free of fire and smoke risk. These compartment sizes are designed by following building code provisions. But people often have a belief/practice that while de- signing compartmentation Fire Doors and Firewalls must be rated for 1 hour, 2 hours, 3 hours or more. But they often misunderstand that all such compartments have utility penetration breaches cre- ated by electric wires, electric cable tray, ducts, pipes, etc. When such penetrations exist, they become the way from which fire and smoke spread out of the compartment and compromise other com- partments too. Therefore, it is important to design compartmenta- tion by considering the following systems together: ■ ■ ■ ■ ■ ■ ■ ■ Fire Barrier Fire Door Fire Stops Fire Dampers 51