A new white paper from the Steel Framing Industry Association (SFIA) addresses the challenge of maintaining continuity of fire resistance in cold-formed steel (CFS) construction while ensuring structural integrity.
The paper, titled “Frequently Asked Questions Regarding Continuity of Fire Resistance in Cold-Formed Steel Structures” (SFIA F101-25), written by Robert Grupe, focuses on how to meet the requirements of the International Building Code (IBC) for fire walls, fire barriers, and fire partitions.
Key points from the paper include:
- The Conflict: A literal reading of fire-resistance codes might require placing a layer of gypsum wallboard between steel elements, which would compromise the necessary steel-to-steel contact for structural load transfer. In such cases, structural requirements take precedence.
- Three Continuity Options: The IBC outlines three distinct conditions for continuity, each with its own structural implications for CFS framing:
- Fire Walls: Must run continuously from the foundation to or through the roof, creating two separate buildings. They are typically nonstructural, flanked by load-bearing walls.
- Fire Barriers: Extend through floor framing cavities, requiring solutions that maintain both structural load paths and fire continuity.
- Fire Partitions: May terminate at the underside of a floor/ceiling assembly, but the structural load path must still be established.
- Why It Matters: Understanding the nuances of these code requirements is crucial for designers and contractors to avoid costly redesigns and delays. Solutions must be acceptable to the authority having jurisdiction (AHJ).
The full white paper provides detailed definitions, illustrations, and practical considerations to help the design, engineering, and inspection teams coordinate effectively.