after nearly 3 years' continuous efforts, Yufeng has developed into a large modern enterprise with more than 1, employees and a factory area of more than 2, square meters. Its products involve door industry, auto parts, construction engineering, advertising and animation industry and real estate development.

"Honesty-based, pursuing infinite possibilities" is the business philosophy of our company, that is, under the guidance of this concept, Yufeng people have created one after another brilliance (one of the earliest manufacturers of security doors in China, the second largest agricultural machinery piston production base in China, and the founder of the first building in Wuyi).

nowadays, the company's flagship products "Yufeng" brand series of security doors, fire doors and steel doors, which were strictly designed and checked by dozens of engineers and technicians, won the title of well-known trademark in China in June 29.

under the control of the standard process of IS91:2 international quality system, it has been rated as "China science and technology hardware product" and "consumer trusted product" for many times.

& Application of Yufeng Fire Door &;

the range of use of wood class c fire doors is much narrower, and wood class c fire doors are mostly used for strong electric wells and weak electric wells.

according to the fire resistance limit, the fire resistance time of Class C wood fire doors shall not be less than .6 hours.

the frame of class c wood fire door is about 8MM thick, while the material thickness of door leaf is about 4MM.

For the holes that run through the upper and lower floors, such as elevator rooms, stairwells and escalators, fire doors or fire shutters should be installed to separate them. For pipeline wells, cable wells, etc., class C fire doors should be installed at the inspection ports of each floor, and every 2-3 floors should be separated with materials equivalent to the fire resistance limit of the floor.

when the building where the shopping mall is located is more than 1 meters high, it should be separated at each floor.

wood fire doors should be made of wood dried by cellar drying method, and the moisture content should not be greater than 12%.

when conditions permit, air-dried wood can be used except for easily deformable tree species such as Larix gmelinii, Pinus yunnanensis, Pinus massoniana and Betula platyphylla, and the moisture content at that time should not be greater than the local equilibrium moisture content.

during the installation of wood fire doors, there may be gaps between frame materials, between frame materials and filler materials, between frame materials and wrapping strips, and between door leaves and door frames.