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Application of structural wood-based panels
Keywords: structural wood-based panels
In 2018, China's wood-based panel output reached 299 million m3, accounting for more than half of the world's total wood-based panel output [4]. At present, about 80% of the wood-based panels produced in China are used in the manufacturing and packaging of furniture, wooden doors and floors, etc., and about 20% are used in building decoration [5], while few wood-based panels are directly used as structural materials. The reasons are as follows: on the one hand, the timber structure occupies a small share of China's construction market, so the demand for structural wood-based panels is small; On the other hand, although China's wood-based panel production is large, but the production of structural wood-based panel is very small. The annual output of veneer laminated timber in China is about 200,000 m3[6], but most of the products are non-structural materials, which are mainly used in the packaging industry. Our country has built several orthogonal glulam production lines, but because the market demand is insufficient, the production task is not full. In 2013, the Ministry of Housing and Urban-Rural Development led a survey on the application market of timber structure technology in China [7]. The results showed that the market size of timber structure construction in China was about 3 million m2/ year, which was only 0.35% of the total construction market in China, while the ratio in North America was as high as more than 70%, showing a huge gap. In the built timber structure, light timber structure is the mainstream, accounting for about 2/3. Since light timber structure houses usually have 2 ~ 3 storeys, each 1 m2 light timber structure house needs about 3 ~ 5 m2 of cladding panels. According to this estimate, China's annual timber construction needs about 9 "China wood-based panel" 2019 26 10 comprehensive discussion Focus 6 million ~ 10 million m2 of cladding panels are consumed. According to the 20 mm thickness of the cladding panel, it is estimated that no more than 200,000 m3 of wood-based panels are directly used in wood structure engineering each year. However, structural wood-based panels can also be used in other types of structures in the form of insulation partitions, or as semi-structural components such as building formwork, so the actual consumption should be greater than the estimated value. To implement the central about the overall requirements of promote the building of ecological civilization, accelerate the "safe and practical, energy conservation and waste reduction, economic, beautiful, healthy and comfortable" green housing construction, to promote "energy conservation, emission reduction, safety, convenience and recycled" green building materials, and promote the development of prefabricated construction, successively promulgated a series of wood related policies in China in recent years, It has laid a good foundation for the development of wood structure industry in the future. At the same time, through the continuous promotion and promotion of various organizations, the market recognition of timber structure is gradually improving, and timber structure building will inevitably enter a period of high-speed development in the future. At present, the market share base of wood structure is very small, and the future promotion potential is very large. The consumption of structural wood-based panels brought by the rapid development of wood structure will also be very huge, and its consumption may increase by dozens or even hundreds of times. Therefore, the market prospect of structural wood-based panels is very optimistic. |
