--Glazing in fire rated door
Today’s fire rated doors frequently incorporate glazing to enable vision and transparency that maximize natural or shared lighting as well provide additional security to areas that would be otherwise closed-off. Having large vision panels in fire doors provide important safety functions as well. During a fire, first responders are able to see inside the room and visually assess the situation, enabling them to be more effective.
1. Wired Glass
2. Ceramic Glass
It is important to note that while there are fire protective products rated from 60 to 180 minutes, their application is limited to door vision panels, and size limitations may apply. For 180 minute doors, fire protective products may be listed for 100 square inches, although the IBC does not permit any vision panel in a 3-hour rated fire door. For 60 and 90 minute doors in exit enclosures and exit passageways, fire protective products are limited to 100 square inches whether or not the building is fully sprinklered. In addition, fire protective glass, such as ceramics and wired glass, have limited use in 1-hour walls, and are prohibited altogether as sidelites, transoms and windows in 2-hour interior walls because they cannot block radiant heat. These limitations are recognized in the IBC, and recent revisions to the 2012 IBC give end-users clear guidance in applying those limits.
Asico lite frame has been tested to standard of UL10B, UL10C, with fire rating time up to 180minutes.