All parts of a fire door, including its frame or jamb, will need to be fire rated to achieve code compliance. To ensure the assembly works as intended, the International Building Code (IBC) requires all components to have the same or greater ratings and level of fire protection than the required code minimums.
The specific rating for a fire door’s frame will depend on where it’s located within a building. For example, fire-rated walls that divide a building may require fire door assemblies with frames rated for 90 minutes. For stairwell enclosures, codes may require fire-resistant jambs rated between 60 minutes and 120 minutes. This is to protect against heat transfer and to comply with temperature rise door criteria, so paths of egress remain passable.
Requirements can also vary significantly since locations can choose to adopt (and amend) different model codes as well as past editions. As such, it is recommended that specifiers clarify fire door requirements with an Authority Having Jurisdiction (AHJ).
No matter what fire rating is required, specifying fire-rated door jambs no longer has to come at the expense of design intent. TGP offers fire door assemblies with narrow-profile frames that provide a close visual match to non-rated assemblies to ensure a cohesive aesthetic throughout a building’s interior.
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