polystyrene fire rated

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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...
GrainTech® is available with very broad fire ratings. The option of GrainTech® does not affect the fire rating of the door. Fire ratings depend on the door series, hardware and applications. ...
There is no fire rating for butt hinges, but NFPA 80 says to use steel material and ball bearing hinges for fire rated openings.
The 3130 Series closer is UL listed- Fire Rated (UL-10C) for up to 3 Hr.The Door and Frame Manufacturer needs to be contacted to verify their Door/Frame rating would not be compromised wh...
The Von Duprin 33A/35A rim narrow style exit device is only for non rated openings and fire rating is not available with this device. The Falcon F24-R is a narrow style fire rated exit device T...