Rolling fire doors are generally used in areas to separate spaces in the event of a fire. A rolling fire door is very similar to a rolling steel door yet it carries a fire rating. It is not opened and closed on a regular basis like a standard door. The door is the for the express purpose of a fire stop. These doors can be set up to close a few different ways . Many of our installs are configured with a fusible link. A fusible link is a piece of metal that is  attached between two cables that hold the door in an open position. The fusible link is made to melt at 165 degrees fahrenheit. Once the link melts, the door drops and closes off a specific area. These doors can also be made to drop with the use of an alarm system. When it comes to repairs or installations of fire doors it’s always best to leave this to a professional. The attempt to rig doors to work temporarily and use nonstandard parts is never and good practice with a fire door. In many businesses, a Fire Marshall will visit your facility on an annual basis to confirmed that the door has been drop tested. Of all of the types of rolling doors these are the most expensive. Not just to install, but  fire doors have the highest long term cost to own.