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A crash bar (also known as a panic exit device, panic bar, or bump bar) [1] [2] is a type of door opening mechanism which allows users to open a door by pushing a bar. While originally conceived as a way to prevent crowd crushing in an emergency, crash bars are now used as the primary door opening mechanism in many commercial buildings.
Zettler Hardware Co. (founded by Zettler in 1886) moved into the space in 1925, occupying it until 1940. The hardware company moved into another space downtown, and has since expanded to several locations around Central Ohio. The business is still owned by the Zettler family, and is the oldest hardware retailer in Columbus.
Working with his neighbor, Henry H. DuPont, an Indianapolis architect, the two men developed and were awarded a series of nine patents relating to new and improved exit door hardware. All of the patent designs focused on a single lever bar (and related hardware) that would cause a locked door to pop open when simple interior pressure was ...
Door furniture (British and Australian English) or door hardware ... Crash bar or Panic bar; [3] Flush pull handle for sliding glass door. Locks
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Products include wood composite decking and railing, exterior cladding products, vinyl fencing, OEM PVC profiles, wood doors and door-frames, and vinyl sheet piling. The group also has several service units in the roofing, security gate systems, and steel I-beam markets.
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