contra swing mullion

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Contra-swing mullion; Opposite Swing Mullion
Double Egress with a mullion; Opposite Swing Frame
Minimum door opening for a 98/99 rim device with a 4954 mullion and 299 strike is  26.687" (26 11/16")
Bottom mounting fitting on 9954 is taller than 4954. The taller bottom fitting is required for a fire rated application.
Steelcraft does not manufacture 12 gage closed section mullions. The maximum is 14 gauge. Steelcraft can provide the outer perimeter  (open sections only)  of a transom frame in 12 gage material. ...