FIRE RATED MULLIONS

RELATED FAQS

Question
Answer
To use Von Duprin mullion for something other than our standard strike, order the mullion "Blank" and prep in the field.
The Von Duprin 9954 or KR9954 mullions are hurricane rated.
HH hurricane rated devices usually have a deferent strike and fire rated mullion. Standard 98/99 series exit devices can be converted to HH by changing the strike and mullion on pair of doors. ...
All 3 hour fire rated pairs of doors do require an astragal when used without a removable hardware mullion. Pairs of doors with removable hardware mullions are treated and listed as 2 single doors...
The Von Duprin XP98/99 device uses a different strike than standard 98/99 device. The 909 strike is for non fire rated XP devices and the 954 strike is for the fire rated XP device. 49/9954 mul...
The 909 strike is used in single and paired non-fire rated and single fire rated openings.  The 954 strike is used in fire rated paired openings.
The 1609 strike cannot be used with Von Duprin XP98/99 exit device.