Fire Door Systems are designed to automatically close when a fire is present. They are used in commercial and industrial applications where a fire barrier is required. The sliding fire door systems can be labeled anywhere from 20 minutes to 4 hours. Fire Door Closing Devices must be UL Listed and Labeled, and are required to be tested every 6 months. The closing system can be weight close, spring reel close, or motorized:

Weight Close System: A weight box mounts next to the door and pulls the door closed when the fuse link separates or from an electromagnetic release device, which can be tied to the building’s life safety system.

Reel Close System: A spring loaded cable reel mounted at track height pulls the door closed when the fuse link separates or from an electromagnetic release device, which can be tied to the building’s life safety system.

Motorized: The operator system includes heat detectors and a battery backup system that closes the door when heat is detected. The battery backup insures that the door operates even in a power failure. Motorized systems may also be tied to the building’s life safety system.

Automated fire doors allow the door to be used as a functional door system as well as a fire door, reducing costs by providing two separate functions for a single door system and insuring that the door will be operational in the event of a fire. Fire door systems can be equipped with pass doors including multiple doors to provide means of double egress. Sliding fire doors require less headroom than conventional rolling overhead fire doors. Single slide or center-parting configurations are available.

A “Casing Mounted” door system is a door that includes a frame or set of casings that mount to the face of the wall. This design provides an improved seal, allows clearance for pass doors, and reinforcement on the wall for the system as well as superior aesthetic appeal. Gasketing is available for the doors to provide an excellent seal.

Fire door cores can consist of honeycomb, fiberglass, mineral wool or calcium silicate. A honeycomb core door can have a 20 minute to four hour rating, no temperature rise rating. A fiberglass core door can have 1.5 to 4 hour labels with a 30 minute 650 degree temperature rise rating. A mineral wool core door can have a 1.5 to 4 hour label with a 30 minute 450 temperature rise rating. Calcium silicate is a core door can have a 1.5 to 4 hour label with a 30 minute 250 temperature rise rating.

650 degree, 30 minute label = The temperature on the opposite side of a fire door will not rise more than 650 degrees in 30 minutes in a fire.

450 degree, 30 minute label = The temperature on the opposite side of a fire door will not rise more than 450 degrees in 30 minutes in a fire.

250 degree, 30 minute label = The temperature on the opposite side of a fire door will not rise more than 250 degrees in 30 minutes in a fire.

Measuring for a Sliding Door System
Sliding door systems require detailed information to insure that a door system will fit and function properly in an application. All Chase products are custom manufactured for a specific application. Detailed measurements and application information is required to insure that the right product is provided.