Rolling steel fire doors are commonly used in buildings where interior fire walls have been constructed to separate an area within the building to contain potential fires within the building spaces. Such doors can also be used in exterior applications to protect against fire risk from adjacent buildings.
Wall construction within buildings requiring fire rated walls could be specified to carry a 4, 3, 1 1/2 or 3/4 hour ratings.
Rolling Fire Doors
The fire doors should be drop tested once a year, in some cases twice, depending on the fire code in your city or your insurance requirements. Division Overhead Door, Inc. has a drop test program that you can rely on. Please click here to learn more.