How do the FIRE RATED DOORS WORKS ?

The fire resistance rating of fire door depends on its fire insulation and fire integrity. The fire insulation of the steel fire door are related to the thermal conductivity of the door core material and the thickness of the door leaf, while the fire integrity is mostly related to the structure of the fire door. Unreasonable arrangement of stiffeners, hinges and other structures of the fire door will lead to excessive deformation of the door leaf and loss of fire integrity of the fire door. By analyzing the fire resistance of fire door through finite element method and optimizing the setting of stiffener and hinge, the deformation of fire door leaf can be reduced and the fire resistance of fire door can be improved.

Here are some steel door fire rating time

l 20 minutes 

l 30 minutes

l 45 minutes

l 60 minutes

l 90 minutes

l 180 minutes

So what’s the essential requirement for a fire door ?

l The unit must be self-closing. Like the door closer , self closing hinge will have the function  ;

l The unit must be self-latching. It means you have buy the door lock with UL listed label ;

l The unit must have a label attached.

l The door frame must have an attached or embossed label. The label is authorized by designated company from your door testing lab .

l The unit must have steel bearing hinges. 2 BB or 4 BB

l The unit must have “listed” hardware. 

Shanghai Xunzhong fire steel door range from 20-180 min , fire wood door ranges from 20-90 min .All door frame and door slab with fire label .To know more about your project budget , please feel no hesitate to contact whatsapp +86 13311796416 ， email : [email protected]