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The functions and characteristics of wooden fire doors
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Wooden fire doors not only serve the same functions as ordinary doors but also play a crucial role in preventing the spread of fire and smoke. They can effectively contain a fire for a certain period of time, ensuring safe evacuation of personnel and safeguarding people’s lives and property.
Wooden fire-rated door Not only does it serve the function of a regular door, but it also helps prevent the spread of fire and smoke. It can effectively contain the fire for a certain period of time, ensuring safe evacuation of personnel. , protecting people's lives and property safety 。
Wooden fire-rated door The technical specifications consist of two parts: “General Technical Requirements for Wooden Fire Doors” and “Fire-Resistance Test Methods for Doors and Shutters.” The main contents of the General Technical Requirements for Decorative Wooden Fire Doors include material selection criteria, covering only allowable deviations, installation joint widths, and permitted tolerances. In addition, finely decorated wooden fire doors must possess sufficient structural strength; after undergoing a sandbag impact test, they should still maintain good overall integrity. The filling material inside the door leaf must not crack or fall out. The doors should open and close smoothly, without exceeding... It can be opened with a thrust of 80N and features an automatic closing function.
According to fire safety regulations such as the "Code for Fire Protection Design of Buildings," firewalls must be constructed using non-combustible or flame-retardant materials. The "Code for Fire Protection Design of Interior Decoration of Buildings" stipulates that, except for ordinary residential buildings, wall decorations in all other structures must use non-combustible or flame-resistant materials. As an integral part of firewalls, wooden fire doors, in addition to their fire-resistance performance, should also be made from fire-resistant materials. The "General Technical Specifications for Wooden Fire Doors" do not impose any specific requirements on the surface finishing materials of these doors. Typically, the thickness of the door frame for fire doors is... Approximately 35 millimeters thick, when burned at a carbonization rate of 0.6 minutes per millimeter, it will completely burn through in 60 minutes. Fire doors made from untreated wood meet the 0.5-hour fire-resistance requirement, while fire doors made from flame-retardant laminated wood meet the 1.0-hour fire-resistance requirement.
As can be seen from "Permissible Deviations for the Fabrication of Wood Fire Doors," the permissible deviations for the height and width of Class I fire doors are as follows: the door... 0/-1, where 1 represents the door and 0 represents the frame. Assuming the nominal time for the door leaf is X, the actual dimensions of the door leaf for Class I products can range from X to X + 1 mm, while the actual inner dimensions of the door frame can range from x - 1 mm to x mm. If, during installation, neither the door leaf nor the inner opening of the door frame has been reworked, the fit will be poor, making it impossible to close the door. As indicated in the "Clearance Width for Installation of Wooden Fire Doors," the recommended clearance widths for wooden fire doors are as follows: the joint between door leaves should have a clearance of 1.5 to 2.5 millimeters; the vertical gap between the door leaf and the frame should be 1.5 to 2.5 millimeters; and the upper gap between the frame and the door leaf should be 1.0 to 1.55 millimeters. It is essential to ensure that the unilateral vertical gap between the fan and the frame measures between 1.5 and 2.5 millimeters. During installation, the amount of material to be trimmed from the door leaf should be between 3.0 and 7.0 millimeters.
In the "Permissible Deviations for the Fabrication of Wood Fire Doors," the permissible deviations for warping of the door frame and door leaf are as follows: The allowable deviation for the flatness of the contact surface between the door frame and the door leaf, as specified in “Permissible Deviations for Installation of Wooden Fire-Resistant Doors,” is 2 mm. If the warping deviations of the door frame and the door leaf are 2.5 mm and 0.2 mm respectively, then after installation, the flatness deviation at the interface between the door frame and the door leaf will exceed 2 mm, failing to meet the standard requirements.
Wooden fire-rated door
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