Asico Door provides hollow metal doors and frames to meet the requirement of an opening which requires strength, durability, or maximum fire resistance. Asico double door is tested with UL 10(b),UL10(c) and confirm to NFPA and ASTM.
General Specification for Hollow Metal Door
Material and Accessories
Galvanized steel sheets shall be used for door frames, door panels and their reinforcements. The door frame is made of 1.5 mm thick steel sheet; the door panel is made of 1.0-1.2 mm thick steel plate, and the reinforcement should be 1.2-1.5 mm thick steel plate. If the reinforcement has screw holes, the thickness of steel plate should not be less than 3.0 mm.
Filling core option: honeycomb kraft core, steel stiffened, polyurethane core.
Between the two slabs, usually there will be a cover seam plate(subject to the request), and installed door closer and door coordinator (except normally closed fire doors)
The melting temperature of metal fittings such as lock, hinge and bolt installed on steel fire door is not less than 950℃.
The smoke seal made of non-combustible materials will be sticked around the three sides frame.
Normally double door is made to have symmetrical door slabs on both sides. In addition, considering the different dimensions, there is another type of double doors. That is double door with unequal leaves/unequal double door/unequal leaf door
Generally, when the width of the door is large, the door slab is designed as a narrow and a wider leaf for the overall beauty of the door.
In general, when the wall opening is large, for the sake of the overall beauty of the door, the door is designed as unequal double door. When the width of the door is larger than that of the ordinary single door (800-1000mm) and smaller than the total width of the double door (2000-4000mm), the double door with unequal leaves can be used.
In this way, it is not necessary to push the small door slab when you pass and keep the small door leaf closed. When transport large size, extra wide goods and other objects, you can open them all.
Asico double door maximum size can be 8’x8’( 2440x2440mm) with vision panel on both door slabs. Except hollow metal door, Asico door team is professional on processing wooden fire door, commercial wooden door and steel door, hospital door, rolling shutter door, blast door etc.