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Unusual Fire Door Symbol

Guest Andy
Guest Andy
in Fire Doors and Accessories

Featured Replies

Found this symbol on a number of fire doors and have been unable to understand the meaning of it. 

I've asked many people and organisations for help - to know avail. So I'd love to hear what your thoughts are. 

 

FD Symbol.jpg

  • Quote
    • 2 weeks later...

    It's an identification plug, often used to identify types of fire door, but this isn't to any of the most common designs past or present, I've always wondered too!

  • Quote
    • 3 years later...

    Andy have you found out what this plug is 

  • Quote

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