The fire resistance time of class B steel fire door shall not be less than 1.0 hours, and the hardware accessories used on the fire door must also use refractory hardware accessories. Usually this grade of fire door is generally used for family decoration door.

fire retardant door,emergency fire rated door price,modern grey fire rated entry door,fire proof sliding hospital doors,fire doors for textile industry,barn style fire door,formica internal fire door,modern grey fire rated entry door,residential fire rated prehung doors,fire retardant door,emergency exit fire rated door,fire doors for textile industry,wholesale fire doors,fire retardant door,fire proof hospital doors,fire rated doors,fire doors for textile industry,modern grey fire rated entry door