WWYD? Keyed Removable Mullion - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene.
Is this an urban legend? - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene.
Von Duprin 4954287 7' Removable Steel Mullion for Double | Build.com
2 Types of Removable Mullions - Beacon
Dorma F1340-KR Fire-Rated Keyed Mullion for Rim Exit Devices
What Is A Mullion? - Beacon
Non Fire-Rated Keyed Removable Mullion
WWYD? Hollow Metal Removable Mullion - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene.
Design Hardware KRM Keyed Removable Mullion for Exit Devices
Door Frames and Mullions - Fixed vs. Removable
Von Duprin 9954-8FT3IN-28 Removable Steel Mullion - Fire-rated, Satin Aluminum Clear
Double Door Hardware Configurations
WWYD? Hollow Metal Removable Mullion - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene.
2 Types of Removable Mullions - Beacon
What Is A Mullion? - Beacon
Von Duprin 4954 Removable Steel Mullion | GoKeyless
Auxiliary hardware and general information
Door Frames and Mullions - Fixed vs. Removable
WWYD? Removable Mullion on a Fire Door Assembly - I Dig Hardware - Answers to your door, hardware, and code questions from Allegion's Lori Greene.
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DORMA Removable Mullions for Use with DORMA Exit Devices
Double French Door with Mullions – Real Good Toys
Door Frames and Mullions - Fixed vs. Removable
Aluminum Center Post - Special-Lite
Door Frames and Mullions - Fixed vs. Removable
