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Technical requirements for wood fire doors and Development Strategies
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According to "building design for fire protection," such as building fire regulations, fire doors open for the firewall, staircase entrance, evacuation corridors, pipelines and other parts of open wells, separated from the role of fire. According to materials, usually divided into the steel fire door fire doors fire doors and wooden two categories. Wooden fire door with a light weight, easy installation, decoration effect is good, widely used in various types of civil construction and some industrial buildings, such as star hotels and the hotel room door, a large hospital ward doors. After nearly 20 years of rapid development, now with wooden fire door manufacturers 372. Wooden fire door product development and production on the protection of people's lives and property, enhance the decorative effect of the building has played a positive role. However, due to product technical standards, certification and management loopholes, resulting in overall industry downturn wooden fire door, which greatly restricted the development of the industry, also used in the construction of fire doors is difficult to guarantee product quality. Of wooden fire door in China are summarized technical standards, testing, licensing certification, production, trade management and other aspects of the problem, a countermeasure to solve these problems. 1. Wooden fire door technical requirements and certification 1.1 The technical requirements for wood fire doors Technical specifications for wood fire doors consists of two parts: "wood fire door general technical conditions" and "door and shutter resistance test methods." Wooden fire door general technical conditions of the main contents include selection criteria, production tolerances, the installation of the left seam width and tolerance and so on. In addition, the wooden fire door should have sufficient overall strength of the impact test by sandbags, still maintain good integrity, add filling material inside the door there should not be cracking or peeling phenomenon; hoist flexible, not more than 80N of thrust in the role of Next to open, and has self-closing feature. The fire resistance of wooden fire door into Class A (≥ 1.2h), B (≥ 0.9h) and C (≥ 0.6h). "The fire door and shutter test method" provides for fire doors fire resistance test equipment, test conditions, specimen requirements, test procedures, determine the conditions for fire resistance. 1.2 Certification Wooden fire door manufacturers have product conformity assessment through the Ministry of Public Security Fire Center (hereinafter referred to as assessment centers), certification, production, sale license to carry on the production and sales. Certification is based on "the implementation of type approval of the fire rules products - fire door products." 2. The problems Technical standards for wooden fire door products, production, certification, testing and management of the following problems. 2.1 Selection "Wooden fire door general technical conditions" states that the "wooden fire doors with wood selection standards." In order to remove the live section, dead knots, pith, crack, twill, and eye defects such as oil, sawn logs with a sheet, from sheet metal to finished articles of wood utilization and packet frames are generally lower than 20% of the door frame material less than 28%. One is to increase timber utilization lower production cost, the second is a waste of resources. In addition, the vast majority of hard wood was impregnated, while the section size is 50 × 100mm above the impregnated wood is more difficult. Therefore, developed countries generally made using wood fire retardant timber door frames and door frame. 2.2 The fire-retardant treatment of wood and wood-based panels "Building design for fire protection," such as fire regulations, the firewall must use non-combustible or flame retardant materials; "building fire protection design of interior decoration," provides, in addition to ordinary residential buildings outside the wall decoration of all non-combustible or flame retardant materials must be used.