Double Egress Opening: A pair of swinging doors, each leaf which swings in the opposite direction of the other.
DOORS: A pair of doors swinging in opposite directions without a vertical mullion....
Communicating Frames are hollow metal frame fabricated such that a door is installed in each rabbet of a double rabbeted frame (2 doors total) to facilitate dual access and control of the opening, ...
For non fire rated doors only the 1609 strike would be used on the inactive leaf that is flush/surface bolted or with a *surface or concealed vertical rod device on other door leaf.