Why were they developed?
The CP100 mullion plugs were developed to solve the internal vertical spread of fire and gasses within the vertical mullion itself. Today’s framing systems are complex and can create issues that cause the wall to fail when testing real-world, advanced two-piece glazing systems incorporating live stack joints.
What are the advantages of the MP100 mullion plug?
The MP100 mullion plug offers the following advantages:
• Flame retardant polyester polyurethane foam that meets UL 94 Classification HF-1 requirements
• New multi-player composite foam, featuring powerful STI intumescent technology, that expands 11-14 times to seal off the path for fire, smoke, and hot gases
• Requires no wet sealant or flammable foam in a can...simply install and set the units
• Leakage rated for less than 1 CFM!
• Noise Reduction Coefficient (NRC) rating of 0.75!
• ZERO VOC’s
• UL Certified product
Is it a code requirement? Is this something that is required for certain wall types to pass?
There are no specific code requirements dictating mullion sealing. The intumescent mullion plug, however, has the capacity to contribute to the fire resistance of certain design listings. Additionally, the MP100 mullion plug seals open stack joints to prevent particulate, air, smoke, and sound waves from transferring through the open ends of the mullions.
What published design listings is the MP100 mullion plug listed in?
Current listings include Intertek tests STI/BPF120-13, STI/BPF12014, STI/BPF120-15, and STI/BPF120-19 and UL test CW-D-1044. Multiple new listings are being published soon.
How is it sold and to whom?
Typically, this is installed by the CW fabricator or glazier in the field or shop but we are finding more and more uses for it per project conditions.
How do I learn more about this solution?
The best place to start is by contacting the CW strategic initiatives team and discussing any opportunity you may have.
This article, by Eric Lacroix, Director, Strategic Accounts Construction, originally appeared in the Summer Wrap-Up 2024 edition of The Burn.