Won-Door Moveable FireWall

Create truly open, flexible spaces—without giving up a true fire barrier. The Won-Door FireGuard Moveable FireWall (MFW) is a UL- certified, accordion-style fire wall that lets architects protect very large openings in fire barriers while still meeting the rigorous requirements of ANSI/UL 263 and ASTM E119.

In conventional construction, openings in a rated fire barrier are tightly limited in area and as a percentage of wall length under the building code. That often means compromised layouts, chopped-up atriums, or narrow passages that work against your design intent. FireGuard MFW changes the equation. Because it has been tested in accordance with ASTM E119, its opening size is no longer constrained by the typical limits on area and wall length, giving you the freedom to plan wide, clear connections between spaces without sacrificing code compliance.

MFW is available in 60- and 120-minute fire- resistance ratings (MFWI and MFWII), providing the performance of a fire barrier in a moveable, single-parting assembly. It protects straight openings up to 40 feet wide and 15 feet high, and curved openings up to 30 feet wide and 12 feet high, with radii as tight as 5 feet—ideal for dramatic atriums, curved galleries and flowing circulation paths.

In everyday use, the opening remains fully usable. The FireGuard Moveable FireWall stacks inside a recessed pocket, with no floor track to interrupt finishes or create trip hazards. When signaled by the building’s fire alarm system, the door closes automatically to re-establish a continuous, ASTM E119- compliant fire barrier, and it can be equipped with ADA-compliant exit hardware to help maintain egress even in the closed position, subject to authority having jurisdiction approval.

From atriums and exit passageways to horizontal exits, control areas and mixed- use separations, MFW is the go-to solution wherever code demands a true fire wall but your design calls for openness, daylight and clear sightlines. Instead of choosing between space and safety, the Won-Door FireGuard Moveable FireWall lets you have both: a high-performance, ASTM E119-rated fire barrier that moves out of the way of great architecture.