Large sales tools and many uses: Pinus southern America is an anticorrosive wood with many uses and wide uses every year in the world; The wood grain is thick and clear, and has a unique wooden style; High strength and superior structural strength: Southern American pine enjoys the reputation of "cork in the world" in the wood construction industry because of its special strength and structural strength. With superior bending and shearing resistance, Pinus nanensis can meet the design load requirements with smaller specifications and sizes, thus greatly reducing the use of wood and the investment cost in practical projects. 4. High strength and wear resistance: American southern pine is often used for floor boards, balconies, railway platforms and container floors, because when used in high strength, American southern pine not only wears less, but also prevents splitting; 5. High retention rate of wood preservatives. The ability of Pinus koraiensis to receive wood preservatives injected under high pressure can retain 20 cubic meters per cubic foot. This high permeability enables Pinus koraiensis to resist water, decay, termites and marine life, which can last for 50 years. VI. "Dry" is the standard quality requirement. It is specially stipulated in the pine grade rules in the southern United States that when the thickness of wood is less than 2 inches (2'), the moisture content needs to be reduced to 19 indexes. Suitable drying conditions determine the shrinkage, stability and applicability of wood. High fixing force of screws and nails, which is one of the characteristics of Pinus koraiensis, is more important in the structural frame of buildings.