Some people say that their solid wood aluminum fence has cracked before it has been used for a year, but they also pay attention to protection. How could such a phenomenon occur? We have learned that the direct cause of cracking in wooden aluminum guardrails is the moisture content of the wood. Normally, wood and its products contain a certain amount of moisture, and the percentage of moisture content in wood to the weight of the wood after drying is the moisture content of the wood. In order to make wooden products adapt well to the climate and living environment, the drying and curing of wood are carried out according to the local moisture content standards during the production of wooden products. This ensures that the moisture content of the wood is consistent with the average moisture content of the atmosphere in the area of use, to ensure the stable performance of the wooden products.
Due to different geographical locations, the average moisture content in the atmosphere varies. Therefore, different regions have different requirements for the moisture content of wooden products. For example, the average moisture content of air in Beijing is 11.4%, while in the southern region it is around 14%. Specifically, the product requirements are between plus or minus 1 of the local average moisture content, "said Li Jiguang, deputy director of the Wood Furniture Quality Supervision and Inspection Station. The moisture content directly affects the quality and use of wooden furniture, especially solid wood furniture. If the moisture content is low, the wood will absorb moisture from the air, causing the wooden products to expand and deform; And if the moisture content is high, there is a risk of cracking.