Door mullion

Door mullion

The center vertical member of a double-door opening set between two single active leaves, usually the strike side of each leaf.

door mullion

The center vertical member of a double-door opening, set between two single active leaves; usually forms the strike side of each leaf; may be removable. also see mullion.
References in periodicals archive ?
The ROPS posts and reshaped cab doors have been repositioned, eliminating the windshield door mullion found on previous models.
Checkpoint's new Performa(R) Proximity Reader for reading ID badges can be mounted directly on any type of wall or door mullion, including metal, without impacting the performance.
Engineered with the same attention to detail and performance as the versatile MA SIGMA biometric access terminal, the MA SIGMA Lite fingerprint terminals are specifically designed to equip narrow mounting surfaces on glass/aluminum door mullions, turnstiles, or server rack doors.