PubDate：2014-06-20 Views：639
Spruce-Pine-Fir
White spruce, alpine fir and twisted pine, these three coniferous species are the main coniferous species that constitute the SPF (spruce-fir-pine) tree species combination. They have many common traits and the same origin, so they are packaged together in Promote in the market.
SPF grows slowly in the northern temperate forests, thus forming densely grained, high-strength sawn timber. They have relatively small knots and are very suitable for construction purposes. In North American construction, SPF sawn timber is the most used main sawn timber species. SPF lumber is a typical light-colored wood. The wood usually has a bright and clean appearance. The color ranges from white to light yellow. It has a dense straight grain and a smooth texture. It has good drying properties. After kiln drying, its strength High and stable performance, with excellent processing performance, suitable for slotting and drilling, easy to fix with nails or screws. SPF sawn timber is also easy to glue with a variety of adhesives, suitable for the production of direct timber and laminated timber. The kiln-dried SPF sawn timber is mainly used for the structural frames of various types of civil, commercial, industrial and agricultural buildings. It is also widely used for the manufacture of prefabricated houses, wooden truss roofs and other structural parts. It can also be used for terraces and houses. Panels, decorative parts, etc. In addition to being used to produce high-quality structures, after a little processing, SPF wood can also be used to make very attractive and economical solid wood furniture.
Canada has abundant reserves of forest resources. SPF is the largest tree population. In terms of forest reserves, SPF accounts for about 17 billion cubic meters. In British Columbia and Alberta, there are about 5.5 billion cubic meters. Among the tree species, the commercial softwood species with the largest forest reserves. SPF sawn timber produced in Canada is light in weight, stable, easy to process, beautiful in texture, and sufficient in supply, making it the best choice for construction and structural timber. Each piece of SPF specification lumber produced in Canada has a grade chapter to determine the tree population, grade, drying conditions, grading organization and manufacturer. These organizations and grade chapters are appraised and audited by the Wood Standards Association Council and are the quality of SPF lumber. Provides the strongest guarantee.
Western Red Cedar
Western red cedar, commonly known as red cedar, is a special tree species with high stability (about 50% less shrinkage than other conifers), light weight, and natural corrosion resistance. Western red cedar accounts for 20% of mature coastal forests. They can grow up to 30 to 45 meters and have a diameter of 120 cm or thicker. The color of wood is usually reddish brown, but it can also show different colors, between white (sapwood) and dark brown (heartwood).
Because of its natural corrosion resistance, western red cedar is very suitable for making building exterior wall hanging panels, roof tiles, doors and windows, outdoor terraces, walkways, fences, fences, pavilions, and a variety of beautification courtyard purposes. The stability of western red cedar makes it a good choice for occasions where the exterior needs to be painted or colored. When subjected to wet and dry cycles, due to its fine texture and natural stability, cracks rarely appear. Because of its light weight and resistance to deformation, western red cedar is the best choice for solid wood blinds.
The density, strength and hardness of western red cedar are lower than other coastal coniferous woods, so it is usually not used in building structures, but there are still designers who specify to use this kind of wood due to appearance considerations, such as exposed beams and columns, which have more visual effects. Important place. Because of its warm color, western red cedar is often processed into indoor wall panels and suspended ceilings.
Douglas Fir
Among Canadian conifer species, Douglas fir is one of the most famous and popular tree species. It accounts for 10% of the coastal forests of British Columbia. Among the coastal tree species, its tree is the tallest and strongest, with a height of 35 to 55 meters and a diameter of 120 cm.
Douglas fir has all the characteristics required for high-quality building materials: high hardness, high strength, high density, easy processing, small warpage and certain corrosion resistance. This tree species is widely used in structural buildings and general buildings. Douglas fir is also the material of choice for glulam beams in heavy timber construction. In the production of doors and windows, refined wood products, etc., defect-free and processed Douglas fir boards are very popular. It has excellent machinability and good bite force for nails and screws. Because of its unique texture and red-brown appearance, it usually only needs to be finished with clear water lacquer in actual use.
Hemlock
Hemlock is the most growing tree species in coastal areas of British Columbia, accounting for 60% of mature forests in the area. The height of the hemlock is usually 35 to 55 meters, and the diameter can reach 90 cm or more. Its wood strength, hardness and density are relatively large (similar to Douglas fir), which makes the hemlock an ideal construction and industrial material. ：It can be used as timber structure frame material, beam column, and engineering wood component. Hemlock is also easy to undergo pressure preservative treatment, so when the wood needs preservative treatment, this tree species is the first choice.
