are key removable mullions fire rated

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To use Von Duprin mullion for something other than our standard strike, order the mullion "Blank" and prep in the field.
The Von Duprin 4754, 4854, 9954, and 9854 mullions can be converted or ordered with key removable option. KR54-F kit is the conversion kit to convert the above mullions to key removable mullion.
The UL fire label is at the bottom of the fire rated mullion.  The mullion also ships with a sticker which notes the bottom of the mullion should not be cut.  Cutting would remove the fir...
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...