Firestopping | Getting Technical

For a wall or floor to be effective in restricting fire and smoke spread,all joints, gaps and openings for services must be adequately sealed or fire stopped. This module considers the types of fire stopping methods available.

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Fire suppression system for air ducts
Patent number: 9089727
Abstract: A system for suppressing fires generated within air ducts. The system can include a duct with an aperture, a reservoir containing fire retardant material adjacent to the aperture, and a temperature-sensitive sidewall. The aperture can be sealed with the temperature-sensitive sidewall creating a temporary barrier to fluid communication with the interior of the duct and the reservoir. When a source of heat exists within the duct, the temperature-sensitive sidewall melts or ruptures, expelling fire retardant material. The temperature-sensitive sidewall can be a fusible plug or a frangible tube positioned within the duct in a non-obstructive fashion. The fire retardant material stored in the attached reservoir can be expelled into the interior of the duct, suppressing or retarding the source of heat in response to a temperature in excess to a predetermined value.
Type: Grant
Filed: January 17, 2014
Date of Patent: July 28, 2015
Inventor: Gerald Grattan Flood