Automatic Electric Fireproof Steel Roll Up Door Steel Fire Shutter
Steel fire proof roller shutter door's fire limit is greater than 3hours. Widely used in shopping malls, hotels, office buildings,
underground garages and other public places divided into fire zones.
A.Double skin 0.8mm thickness
B.Aluminum silicate wool is filled in the middle.
A.Galvanized steel thickness:1.5mm-3mm.Expansion seal: At high temperatures , the sealant will expand to cover the gap of the rail to isolate smoke and temperature.