... shutter fire rating update 4 hours Features & Benefits of Rolling Door: 1.Scope of application: Logistics Corridor, indoor partition, outside ... of 20 square meters in area within and outside the door, with insulation, dust, noise abatement, and the next flavor, ... main use stainless steel structure . 3.Wind pressure Performance : 1)door hangings equipped with a wind-aluminum alloy ,the size of wind ...