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“ what core using on fire rated door ”

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Answer
What cores are offered for insulated doors?
Insulated Core Options: Steelcraft L-Series doors are available with the following 2 optional insulated cores: Polystyrene slab - this core is available in non fire rated and fire rated doors...
What are the different door cores available?
The five most common cores are honeycomb, polystyrene, polyurethane, steel stiffened, and temperature rise. Honeycomb core doors are used for interior and exterior openings where high thermal...
What strike do I use with a Von Duprin rim device on a pair of doors with flush bolts?
NON Fire Rated doors would use the 1609 strike applied to the inactive leaf with flushbolts.  This may NOT be used on Fire Rated openings.
Is the Von Duprin 1609 strike fire rated for pairs of doors?
The Von Duprin 1609 cannot be used on a pair of fire rated doors. We recommend using the Von Duprin fire rated mortise exit device in lieu of the rim device such as the Von Duprin 5575-F,...
Are the Falcon SC Series door closers fire rated?
615R is not a door closer model number. It is a UL number for the Falcon SC Series closers.
Yes, the Falcon SC Series closers have a UL listing.
Are Ives butt hinges fire rated?
There is no fire rating for butt hinges, but NFPA 80 says to use steel material and ball bearing hinges for fire rated openings.
Which strike do you use with an XP98/99 device?
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.