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Citigroup Songte points: 1, the structural characteristics of Douglas fir Douglas fir with excellent strength to weight ratio known around the world, its higher proportion provides good nail holding power and holding power. Softwood species in North America, the Douglas fir only has a high elastic modulus, its outermost fiber bending stress, tension along the grain, horizontal shear, pressure and stripes along the grain pressure is also extremely good. Because Douglas fir having these physical properties, and determined to material durability and excellent physical stability, many construction companies around the world will judge the ownership of Douglas fir used as a standard box timber. Douglas fir is known structural performance, appearance is also very beautiful. When designing structures require large wooden beams, long or specially shaped arch span: (such as churches, bridges and stadiums, etc.), Douglas fir is the most common choice of wood species. In the construction of commercial buildings houses, public buildings structure, tower building and water facilities, in, making the structure of Douglas fir glulam beams often used for roofs, floors and horizontal load-bearing frame struts. In the construction of industrial plants, warehouses, garages, and even need to look beautiful architectural structures, glued beam is reliable construction materials 2, features exterior grade wood of Douglas fir Douglas fir has pale rose color and beautiful straight grain by After sun drying darken. Douglas fir toughness fiber cut or carved by hand is not easy, but as long as the use of sharp tools and power tools you can get a smooth cut surface. The wood can be processed into a variety of products along the grain shape, the surface is easy to paint and maintain a variety of staining and varnish. 3, Douglas fir Douglas fir surface treatment can accept all types of dyeing process, the surface treatment material comprises a transparent paint, lacquer, varnish, paint or wax, as well as all kinds of dyeing and painting a bright or pastel color. For the best surface finish, the wood moisture content should be between 12-15%, or closer to conventional moisture as possible. Outdoor building structure should be coated with a primer well as Douglas fir is a relatively dense heavy timber. The main purpose of Douglas fir: indoor / outdoor decorating due after dried Douglas fir, shape and size will not change, will not produce or show a corrugated texture, and therefore particularly suitable for the production of decoration board and joinery products, including fascia, doors, complete joinery, window and door frames, mantels, stairs, baseboards and other exposed structures do not touch the ground. Douglas fir paneling wooden paneling can change any room was elegant and full of fun, with such a wide range of products made of wood can clearly show the beautiful wood appearance. Douglas fir can maintain a stable shape and size, and will not shrink, swell, warp, warped or twisted end. Its entire texture and tenacity fibers can maintain the integrity of color, and can be firmly bite fastener. Douglas fir cabinets and furniture wood appearance, texture and ease of processing characteristics of the surface treatment has been specially designed furniture, including: paneling, doors, furniture, veneer, drawer joinery products and the best selection of wood, with vertical texture Citi Song no scarring its welcome. Douglas fir flooring not only strength, beautiful appearance, durable, and has a rough style, so welcomed by the market. Furthermore, the surface of Douglas fir can "eat" maintained dyes and paint, even in cases of severe wear maintain a good appearance, so it year round to maintain a smooth surface without cracks or chips lobes. Wooden products for industrial use Douglas fir has a high resistance to mechanical abrasion and chemical resistance properties. The need for year-round use of inert materials in harsh conditions barrels, tanks, containers, tanks, pipes and other similar devices for industrial use of wood, Douglas fir is often the choice of wood species. In addition, the architecture and the construction of a model making, mining and tunneling, viaducts, bridges, railways, sleepers, stadiums, warehouses, storage facilities and factories should also use the Douglas fir.