Double-leaf fire door
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A steel fire-rated door is a door composed of a door frame, door leaf frame, and door leaf panel all made from steel materials. If the door leaf contains filling material, it must be a fire-resistant and heat-insulating material that is non-toxic and harmless to humans. Such doors are equipped with fire-rated hardware accessories and possess specified fire-resistance performance. There are some subtle differences in installation methods between steel fire-rated doors and wood fire-rated doors. Additionally, their fire ratings differ slightly; therefore, it’s crucial to pay close attention to detail during installation. First, when installing a wood fire-rated door, the door frame dimensions should be 20 mm smaller than the opening size, and the bottom of the door frame should be embedded 20 mm below the ground level. The door frame must be securely fixed to the wall and maintained at perfect verticality and right angles. During the installation of the door frame and its supports, special attention should be paid to ensuring they are straight and properly aligned, avoiding any unnecessary chiseling or sawing. The number of fixing points on each side of the door frame should be no fewer than three, and the spacing between these points should ideally not exceed 800 mm. Second, when installing a steel fire-rated door, given the potential for bending and deformation of the door frame, it’s necessary to support the frame widthwise using wooden battens. The bottom of the door frame should also be embedded 20 mm below the ground level, after which the frame should be welded to the pre-embedded components on the wall. Next, openings should be made in the wall at the upper corners of the door frame, and concrete consisting of cement, sand, and expanded perlite (in a ratio of 1:2:5) should be poured into these openings. Once the concrete has fully set, the door can be put into use.
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Unit on the 7th floor, Building 10, Liuzhou Yanghe Building Materials Logistics Center, Plot Bingshi-D-1-5, Yanghe Industrial New Area, Liuzhou City, Guangxi Zhuang Autonomous Region