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’s stability makes it a very popular choice for pergolas and gazebos (provided structural support is not a requirement). Softwoods have been exported from the United States for over 400 years. Important structural properties of four Western softwoods : white pine, sugar pine, western redcedar, and Port-Orford-cedar. Very few materials can be reused like this from decommissioned structures, whereas composite materials go straight to landfill. It is found as a tree or shrub. Domestically, both pine and cedar are harvested mainly in the Northwest. Question: We have specified the use of western red cedar in an office building to be used as either wall and/or ceiling cladding. FOREST SERVICE . The following table is Structural Lumber Wood Engineering Properties. Customers who choose western red cedar are reducing their material consumption versus other building materials. 0000002672 00000 n The smoke developed index for Western Red Cedar is 125. Fasteners should be corrosion resistant such as aluminum, hot-dipped galvanized or stainless steel. Detailed product information is available from the Western Red Cedar Lumber Association. produces cedar of Lebanon, a native of the Middle East. 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 22 pounds per cubic foot with a relative density(specific gravity) of 0.35. The conduction of heat in wood is directly related to its density. 1. For many people in the US this is what comes to mind when the word cedar is … Western red cedar, Thuja plicata. Cypress is one of the most versatile timbers available for use in exterior applications. Because of its favorable performance, Western Red Cedar can be used for interior finish in some building applications where other species would not be permitted. No 2 & Better – A grade offered generally for Western Red Cedar timbers and beams when the finest quality rough lumber is desired. Colour: Yellow to a medium brownish colour. Here is an overview of the characteristics that determine the grades of Western Red Cedar: Clear Western Red Cedar. ... are ASTM Standards D 2555 and D 245 for clear wood-based properties, and D 1990 for full-size test specimens. 0000001340 00000 n Lengths are generally a few inches longer than the listed length. 0000003840 00000 n 0000001920 00000 n 0000004778 00000 n American softwoods have the strength […] Believed available from well-managed sources. If exposed for prolonged periods to conditions where decay could be a factor, such as where the wood is in contact with the ground, cedar should be treated with suitable wood preservatives. They are used to regulate the use of interior finish materials to reduce the probability of rapid fire spread. 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. Stumpage prices in 1927 were about one-third of those of Sitka spruce, western red cedar, and Douglas fir. 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. Western Red Cedar’s thermal properties include: A … Vertical grain means that the growth rings are parallel to each other on the face of the board and the wood is sawn specifically to achieve that look. 4 knots per 12’ of board is allowable. The Standard Species Combinations for structurally graded Western lumber are also shown on this page. 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. Their properties are similar to savin juniper. Make sure stainless steel fixings are used, however! Physical & Mechanical Properties A coarse-textured softwood, weighing 376 kg per cubic metre, with a close, uniform, straight grain and an extreme resistance to decay. ¬ The cell structure converts the sound energy into heat by friction and viscoelastic resistance. RESEARCH PAPER FPL 191 . 0000025703 00000 n For example, you could have a Number 2 structural grade that also has an A & Better appearance grade. As Hokie says, Eastern Red Cedar is a juniper. Believed available from well-managed sources. Check certification status with suppliers. changeable in that they share performance properties and are similar in appearance. 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. 2. Wood is extremely durable and long lasting, and can be reclaimed from other projects and reused. Of all available softwood species, cedar tends to be one of the best thermal insulators. Battens and Screens Western Red Cedar is the largest and most abundant of all cedars in managed forests. Growth, properties and uses of western red cedar (Thuja plicata Donn ex D. Don)/by Josefina S. Gonzalez. For many people in the US this is what comes to mind when the word cedar is … Because of the high internal friction created by the cellular pore network, wood has more sound damping capacity than most structural materials. Modulus of Elasticity of Wood, Wood Engineering Design Data. Cedrus libani Loud. 0000002446 00000 n Western red cedar, Thuja plicata. Only a couple of species of Cedrus exist in the world, but they exhibit certain traits that make them very popular. Comparative oven-dry densities of cedar and some other softwood species are given in the Table 1 (in the Product Selection tab).Cedar’s low density enhances its insulation value and makes it an easy wood to transport and handle. Not listed in CITES. It is non-resinous and has a strong spicy scent. 0000004585 00000 n 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. 0000001538 00000 n 1. An important acoustical property of wood is its ability to damp vibrations. 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. The structural grades of Yellow Cedar are ideal for uses where strength and/or natural durability are important. SP-37R) Co-published by Western Red Cedar Lumber Association and Western Red Cedar Export Association. Euroclasses grading: END-USES Structural lumber (including dimension lumber) is visually and/or mechanically (MSR) graded for its strength and physical working properties (appearance is secondary, unless specified). DENSITY. This usually includes interior wall and ceiling finishes, flooring, windows, doors and other wood products. 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. When a material has good thermal conductivity, it means that it can keep buildings warm in the winter and cool in the summer. 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 essential oil of red cedar is toxic. 0000000716 00000 n What lies beneath a tree is just as important -- if not more so -- than what grows above. IMPORTANT STRUCTURAL PROPERTIES OF FOUR WESTERN SOFTWOODS: WHITE PINE, SUGAR PINE, WESTERN REDCEDAR, AND PORT-ORFORD-CEDAR U.S.D.A. 3. Western provides an impressive range of appearance, structural and industrial wood products destined for both local and international markets. Includes bibliographical references. 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. Flame spreading ratings describe the surface burning characteristics of interior finishes. Clear, Vertical Grain – This is the highest grade of Western Red Cedar. Cedar trees fall under the Cedrus genus and the Pinaceae family, which is the family of treesthat is coniferous. ��~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 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. Western Red Cedar is used to manufacture a range of specialty products such as siding, paneling, structural decking and outdoor decking. 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. Tree roots stabilize and feed the tree, and if they are damaged by yard tools, the tree can suffer. When a material has good thermal conductivity, it means that it can keep buildings warm in the winter and cool in the summer. 0000026040 00000 n Western Red Cedar’s open cellular structure helps to absorb and dissipate sound energy, making it effective in confining noise. They are used in conjunction with flame spread ratings to regulate the use of interior finish materials where the potential to generate smoke or control smoke movement is of major fire safety importance. The wonderful properties of CedarWestern Red Cedar is quality, beautiful, durable, versatile, easy to use and maintain. 0000002737 00000 n 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. Design values provided for Western softwood species manufactured and shipped by mills in the 12 contiguous Western states and Alaska. If you don’t care to keep up with the maintenance than red cedar may be a good choice. Alternate Combinations are available in non-structural grades. Austin Wholesale Decking Supply 10900 N Lamar Blvd., Austin, TX 78753 Phone: 512/834-1200 An infusion of the leaves has been used in the treatment of stomach pains and diarrhoea. Today, America is recognized worldwide as a sustainable source of top quality products. Comparative oven-dry densities of cedar and some other softwood species are given in the Table 1 below. ¬ 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. A decoction of the leaves has been used in the treatment of colds. Cedar has a long history of withstanding the rigors of time and weather. It is available in clear or knotty grades with smooth surfaced, combed or rough sawn finishes; kiln dried or unseasoned (green); flat grain and vertical grain. Span Tables Spans for Western Red Cedar dimension lumber used as joists and rafters in residential and commercial structures are available from the Western Red Cedar Lumber Association, the Canadian Wood Council and the National Association of Home Builders. Distribution. Wood has a cellular network of minute interlocking pores which converts sound energy into heat by frictional and viscoelastic resistance. With its low density and high proportion of air spaces, Western Red Cedar is the best thermal insulator among the commonly available softwood species and is far superior to brick, concrete and steel. British grown western red cedar generally has similar properties to material imported from North America. Demonstrate Western Red Cedar’s versatility as a building material through three case studies Western Red Cedar’s stability makes it a very popular choice for pergolas and gazebos (provided structural support is not a requirement). Western Red Cedar offers the advantages of natural beauty, design flexibility, exceptional dimensional stability and long term durability. Shrinkage in both the radial and tangential directions is given in Table 3 (in the Product Selection tab). 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 Western red cedar is one of the most commercially valuable species. %PDF-1.3 %���� However, it has a very low shrinkage factor and is superior to all other coniferous woods in its resistance to warping, twisting and checking. Comparative oven-dry densities of cedar and some other softwood species are given in Table 1. Forest Products Laboratory, Forest Service … Get this from a library! Lengths are generally a few inches longer than the listed length. Not listed in CITES. These astounding properties protect the building from the extreme heat and cold. Twenty years ago the species was considered as having practically no value. The cost of logging western hemlock is ordinarily high as com- Western hemlock is increasing in the esteem of lumbermen. Aromatic Red Cedar glues and finishes well, though in many applications, the wood is left unfinished to preserve its aromatic properties. Detailed product information is available from the Western Red Cedar Lumber Association. [B A Bendtsen; Forest Products Laboratory (U.S.)] class 3 - not in ground contact, outside While most trees decompose with a few years, this giant tree may take over 100 years to rot and return to the soil. }��MT_�5���L�0��P�ȅg��&�5Eo!�2Y��%�Z���-���n��\H��wDa���nZr�1�]�������ID�~�g��� ��^��WÃ�D�q�� KR;Q����ipu�L#���kdY���o �hBaL. 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. Western Red Cedar especially is superior to steel, concrete, and brick in this respect. This results in reduced energy usage and contributes towards a higher Green Star building rating. Includes bibliographical references. 0000001686 00000 n Building codes in North America generally define as interior finish any exposed material that forms part of the building interior. 2. Review specification options of Western Red Cedar, including lumber and appearance grades, as well as compatible fastener selection. Western Red Cedar Beams Full dimension beams. 0000005160 00000 n Medicinal and Other Uses for the Western Red Cedar. 12% is the summer average equilibrium moisture content in most areas of the US. In this article, I describe forty facts about the plant and the importance of the “tree of life” in the local culture. Western Red Cedar is used to manufacture a range of specialty products such as siding, paneling, structural decking and outdoor decking. Properly finished and maintained, cedar will deliver decades of trouble-free service. 0000001473 00000 n It's stronger than Western red or Eastern white, but you're never going to find any large enough for rafters. 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