Commercial door mullions provide a center support for pairs of doors, helping align the opening and giving exit devices, latches, and locks a solid mounting surface. They are commonly used on storefronts, offices, schools, and other high traffic openings where durability and consistent operation matter.

This category includes fixed and removable mullions. Fixed mullions stay in place for everyday strength. Removable mullions can be taken out when you need a wider clear opening for moving equipment or deliveries. Choosing the right mullion usually comes down to door type, opening width, hardware requirements, and whether the center post needs to be removable.