Fire rated wall penetration

May 1, Firestopping non-dampered heating, ventilation, and air-conditioning HVAC duct penetrations in fire-rated walls is more involved than installing that ubiquitous red caulk into the space between the duct and the periphery of the opening. Because of the nature of thin sheet metal ductwork and the physics that come into play during the course of a fire, additional steps are required to ensure that such penetrants are properly protected. Today, a search would yield total systems for HVAC duct penetrations through walls. In just 7 years, the industry has more than 3. Many HVAC ducts penetrating fire-rated walls are externally insulated with light-density glass fiber duct wrap, whether for energy conservation, efficiency increases, condensation control, or even sound attenuation.
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Improving Firestopping for HVAC Duct Penetrations in Fire-Rated Walls

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USG Design Studio | Wall Penetration - Download Details

It ensures that fire, smoke and toxic gases are contained to reduce the tragic loss of human life and damage to property. Firestopping is an effective way of Building Compartmentation. To prevent the spread of fire, smoke and toxic gases within a building, certain walls, floors and joints are required to meet a specific fire resistance rating. What it takes for fire to start? If anyone of the three elements is missing, fire will not ignite, or, if it is already burning, removing one of the three will quench the flames.
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Penetrations in fire rated systems

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