western red cedar structural properties

Visually, western red cedar is favoured for its rich and inviting colours. Cedar is a type of coniferous wood, meaning that it is classified as a softwood and its cones/needles remain all year round. Detailed product information is available from the Western Red Cedar Lumber Association. Precautions and toxicity of red cedar. Western Red Cedar is used to manufacture a range of specialty products such as siding, paneling, structural decking and outdoor decking. Building codes in North America generally define as interior finish any exposed material that forms part of the building interior. The only notable difference is the natural durability which is rated as moderately durable (imported material is classified as durable). Herb: Western Red Cedar Latin name: Thuja plicata Synonyms: Thuja gigantea, Thuja lobbii, Thuja menziesii Family: Cupressaceae (Cypress Family) Medicinal use of Western Red Cedar: Western red cedar was employed medicinally by a number of native North American Indian tribes, who used it to treat a wide range of complaints. The most sought after property of Western Red Cedar is its resistance to decay and insect damage, lasting in most any environment well over 100 years. Cedar trees fall under the Cedrus genus and the Pinaceae family, which is the family of trees that is coniferous.. Only a couple of species of Cedrus exist in the world, but they exhibit certain traits that make them very popular. 0000002446 00000 n SP-37R) Co-published by Western Red Cedar Lumber Association and Western Red Cedar Export Association. For structural applications, Western species readily combine into six Species Groups, shown below. Make sure stainless steel fixings are used, however! Evidence of cedar’s durability are the many cedar artifacts still in good condition today. trailer <<4ad01420134611da8c53001124daefbc>]>> startxref 0 %%EOF 237 0 obj<>stream Demonstrate Western Red Cedar’s versatility as a building material through three case studies When a material has good thermal conductivity, it means that it can keep buildings warm in the winter and cool in the summer. This results in reduced energy usage and contributes towards a higher Green Star building rating. Western Red Cedar especially is superior to steel, concrete, and brick in this respect. Due to its soft properties, Western Red Cedar takes to machining very well, and it both screws and nails with good result. Add to the fact the specie is highly durable, and the result is both a pergola with a ‘wow’ factor, plus years of sheltered entertaining. Woods with low density have the highest thermal insulating value because such woods contain a high proportion of cell cavities. Western red cedar. These superior ratings allow for cedar to be used in the interior of a structure without the need for treatment. What Western Red Cedar lacks in strength, it makes up for in appearance. In this article, I describe forty facts about the plant and the importance of the “tree of life” in the local culture. It has a coefficient of thermal conductivity (k value) at 12% mc of 0.74 BTU inch/ft2h degrees F. The R value (the reciprocal of k) for Western Red Cedar is 1.35″ (34mm) of thickness. The results showed that all of the species investigated can produce structural timber, but that western red cedar has the least desirable properties for this purpose. Durability As one of North America’s most durable woods, it lasts for decades and even centuries. 0000002940 00000 n The simple cell structure of softwoods’ long, uniformly packed fibers gives them a high strength-to-weight ratio, making them flexible and capable of bearing heavy loads. Characteristics & Properties of Western Red Cedar, characteristics-properties-of-western-red-cedar. When used as exterior cladding, Western Red Cedar keeps buildings cooler in summer, while cutting heating costs in winter. Characteristic values of mechanical properties and density were determined and indicative yields for different strength classes were calculated. Return to main Cedar page. Alternate Combinations are available in non-structural grades. Western hemlock is increasing in the esteem of lumbermen. Not listed in CITES. Wood has a cellular network of minute interlocking pores which converts sound energy into heat by frictional and viscoelastic resistance. Trucking from the west coast, and the general higher cost of cedar vs. pine will put a dent in your wallet. Historically, native peoples of the Pacific coast prized cedar for its long lasting qualities and used wood and bark from cedar trees for most of their building needs. Check certification status with suppliers. Odor: Aromatic Red Cedar has a distinct and tell-tale scent: the wood is commonly used in closets and chests to repel moths and other insects. Western Red Cedar Beams Full dimension beams. The Western Red Cedar contains a extremely strong compound called trienolone, which is one of the reasons the wood takes so very long to decompose on the forest floor. One of the lightest commercial softwoods, the density of Western Red Cedar at oven-dry conditions is approximately 21 pounds per cubic foot with a relative density (specific gravity) of 0.32. Medium-to-fine texture. 1972 . Softwoods have been exported from the United States for over 400 years. For example, you could have a Number 2 structural grade that also has an A & Better appearance grade. Western red cedar, an ornamental and timber evergreen conifer of the cypress family (Cupressaceae), native to the Pacific coast of North America. Western red cedar is one of the most commercially valuable species. 0000001705 00000 n Cedar has a long history of withstanding the rigors of time and weather. Medicinal and Other Uses for the Western Red Cedar. ��~F�yV�|y��*6���� �%$,�p� #�_Ӽ�>Rf� �NI}�nk���^:fҊM���T�� endstream endobj 235 0 obj<> endobj 236 0 obj<> endobj 238 0 obj<> endobj 239 0 obj[] endobj 240 0 obj<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageB]/ExtGState<>>> endobj 241 0 obj<> endobj 242 0 obj[/CalRGB<>] endobj 243 0 obj[/Separation/PANTONE#20622#20CVU 242 0 R 249 0 R] endobj 244 0 obj<> endobj 245 0 obj<> endobj 246 0 obj<>stream 0000002737 00000 n The heartwood ranges from a pale brown through to a richer dark brown. The following table is Structural Lumber Wood Engineering Properties. British grown western red cedar generally has similar properties to material imported from North America. Western Red Cedar is ideal for projects that require stability, natural durability and easy to work with, such as: Outdoor landscape elements:decks, planters, fences, screens, garden furniture and sheds; or exterior siding, roof tiles, interior wall and ceiling panelling, doors and windows, and a variety of joinery items. 0000001686 00000 n Lengths are generally a few inches longer than the listed length. Timber properties of noble fir, Norway spruce, western red cedar and western hemlock grown in Great Britain (PDF, 580.1kB) The softwood processing sector in Great Britain has been built around the use of a very small number of timber-producing species – predominantly Sitka spruce. 0000001920 00000 n Our BCA consultant requires confirmation that the western red cedar is a … Introduction . Detailed product information is available from the Western Red Cedar Lumber Association. Forest Products Laboratory, Forest Service … or 25' high, they branch like crazy, and the wood is only commercially marketed for aromatic purposes (anti-insect) for closet linings and the like. ��(p�Z� It is non-resinous and has a strong spicy scent. 0000000716 00000 n Heartwood varies from dark reddish brown to a pinkish color and has excellent weather-resistant properties. Radial shrinkage applies to the width of vertical grain lumber: tangential to the width of flat grain lumber. These lovely deep green trees give off a fragrance that is just simply inspiring, I’d have to say. Believed available from well-managed sources. Aromatic Red Cedar glues and finishes well, though in many applications, the wood is left unfinished to preserve its aromatic properties. No 2 & Better – A grade offered generally for Western Red Cedar timbers and beams when the finest quality rough lumber is desired. Western provides an impressive range of appearance, structural and industrial wood products destined for both local and international markets. Cedar is a type of coniferous wood, meaning that it is classified as a softwood and its cones/needles remain all year round. Wood is an excellent thermal insulator. produces cedar of Lebanon, a native of the Middle East. Battens and Screens Western Red Cedar is frequently the material of choice for pure Decorative trusses, but should be checked thoroughly if intended for use in Structural applications. The lower the flame spread rating, the more the material resists the spread of fire. Western Red Cedar has flame and smoke development ratings that are higher than most in its class. Western Red Cedar is particularly effective in this regard and can be used to help reduce noise or to confine it to certain areas. Western Red Cedar’s open cellular structure helps to absorb and dissipate sound energy, making it effective in confining noise. DURABILITY–Western red cedar, atlantic white cedar and Alaskan yellow cedar are naturally durable softwoods that creates extractives (Thujaplicans and Phenolics) that ward off decay caused by insects, water infiltration, and fungi.The extractives increase with age leading to a longer lasting product life cycle–especially in exterior applications. Today, America is recognized worldwide as a sustainable source of top quality products. Western Red Cedar Harmful Properties May cause respiratory problems Western Red Cedar Interlocked Grain No Western Red Cedar Kiln-dried Shrinkage Low Western Red Cedar Machine Tools Average Western Red Cedar Mortising Good Western Red Cedar Movement after drying Low Western Red Cedar … Not listed in CITES. Western or Pacific redcedar, giant or western arborvitae, giant cedar, canoe cedar, shinglewood, is an evergreen coniferous tree in the cypress family Cupressaceae, native to Western North America. Cedar produced by the Western Red Cedar Lumber Association includes specialty end use grades as well as products graded to National Lumber Grading Authority (NLGA) rules. Structural and Appearance grades can sometimes be combined as well. Domestically, both pine and cedar are harvested mainly in the Northwest. Design values provided for Western softwood species manufactured and shipped by mills in the 12 contiguous Western states and Alaska. The cost of logging western hemlock is ordinarily high as com- changeable in that they share performance properties and are similar in appearance. Western or Pacific redcedar, giant or western arborvitae, giant cedar, canoe cedar, shinglewood, is an evergreen coniferous tree in the cypress family Cupressaceae, native to Western North America. In dry wood, these cavities are filled with air which is one of the best known thermal insulators. We know this can get confusing, so if you want to do more research you can visit the Western Red Cedar Lumber Association website for more grade info. What Western Red Cedar lacks in strength, it makes up for in appearance. 0000001340 00000 n Western red cedar. Get this from a library! Clear, Vertical Grain – This is the highest grade of Western Red Cedar. ... and depth-effect adjustments are provided for Structural Decking. The only notable difference is the natural durability which is rated as moderately durable (imported material is classified as durable). Western Red Cedar is frequently the material of choice for pure Decorative trusses, but should be checked thoroughly if intended for use in Structural applications. %PDF-1.3 %���� There are few more versatile building materials than Western Red Cedar which is ideal both for indoor and outdoor uses. Cedrus deodara Loud. Historically, western red cedar (also known as western redcedar) was a very important plant for the indigenous or First Nations people who lived in the coastal area. SP-37R) Co-published by Western Red Cedar Lumber Association and Western Red Cedar Export Association. Softwoods have been exported from the United States for over 400 years. 15% is the average equilibrium moisture content of wood during the summer in the Pacific Northwest. Natural resistance to deterioration has long made Western Red Cedar the premier choice for either interior or exterior home use. 2. These properties can vary greatly depending on origin and growth conditions. In addition to interior and exterior trim, as well as exterior cladding, Western Red Cedar of this grade is also used for cabinetry, doors, windows and similar applications. Materials are burned in a test furnace for a relative assessment of flammability. Because of the high internal friction created by the cellular pore network, wood has more sound damping capacity than most structural materials. Fasteners should be corrosion resistant such as aluminum, hot-dipped galvanized or stainless steel. ¬ The open cell structure of the timber is able to absorb and dissipate sound energy. Characteristic values of mechanical properties and density were determined and indicative yields for different strength classes were calculated. 0000001538 00000 n Of all available softwood species, cedar tends to be one of the best thermal insulators. Nails and screws used to fasten Western Red Cedar should Historically, western red cedar (also known as western redcedar) was a very important plant for the indigenous or First Nations people who lived in the coastal area. Flame spreading ratings describe the surface burning characteristics of interior finishes. TS/RS ratio: Stability: Crushing strength *: Mean Std dev. Its exceptional working properties like natural resistance to termite, rot and decay make it an ideal choice for outdoor applications. Very few materials can be reused like this from decommissioned structures, whereas composite materials go straight to landfill. The flame spread rating for Western Red Cedar is 45 (Class B rating). For many people in the US this is what comes to mind when the word cedar is … Mechanical Properties of Clear Straight-Grained Wood 4–26 Natural Characteristics Affecting Mechanical Properties 4–27 Specific Gravity 4–27 ... Cedar, western red 0.055 0.081 0.087 0.086 0.005 Douglas-fir 0.050 0.068 0.064 0.078 0.007 Fir, subalpine 0.039 0.102 0.070 0.058 0.006 This is an important characteristic since good thermal insulators help keep buildings cool in the summer and reduce heating costs in the winter. This is due to its high proportion of air spaces and its low density. Twenty years ago the species was considered as having practically no value. Shrinkage does not begin until the fiber saturation point is reached. Western Red Cedar has good fastening properties but its natural preservatives have a corrosive effect on some unprotected metals in close contact, causing a black stain on the wood. 0000011118 00000 n Environmental. It is non-resinous and has a strong spicy scent. Like all woods, Western Red Cedar is hygroscopic and will absorb or discharge moisture to attain equilibrium with the surrounding atmosphere. 0000026040 00000 n I. Detailed product information is available from the Western Red Cedar Lumber Association. It is also a recognized structural material with known mechanical and physical properties. [B A Bendtsen; Forest Products Laboratory (U.S.)] 0000004585 00000 n I. Western Red Cedar especially is superior to steel, concrete, and brick in this respect. C. libanotica Loud. Western Red Cedar lumber is available in visual stress grades for construction and finishing uses in a range of lengths, widths and thicknesses. Acoustic properties. While most trees decompose with a few years, this giant tree may take over 100 years to rot and return to the soil. Distribution. 0000002606 00000 n Comparative oven-dry densities of cedar and some other softwood species are given in the Table 1 below. IMPORTANT STRUCTURAL PROPERTIES OF FOUR WESTERN SOFTWOODS: WHITE PINE, SUGAR PINE, WESTERN REDCEDAR, AND PORT-ORFORD-CEDAR U.S.D.A. Modulus of elasticity also referred to as Tensile Modulus or Young's Modulus. One of these is the Western Red Cedar, also called the giant cedar tree, which can grow to well over 200 feet tall! Customers who choose western red cedar are reducing their material consumption versus other building materials. 0000003840 00000 n Western red cedar will remain dimensionally stable under most weather conditions and is not prone to shrinkage or swelling. 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