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 So we can't just say that western red cedar is a Group 3 material in all cases. The structural grades of Yellow Cedar are ideal for uses where strength and/or natural durability are important. I. Wood is extremely durable and long lasting, and can be reclaimed from other projects and reused. What Western Red Cedar lacks in strength, it makes up for in appearance. This results in reduced energy usage and contributes towards a higher Green Star building rating. Lengths are generally a few inches longer than the listed length. RESEARCH PAPER FPL 191 . One of these is the Western Red Cedar, also called the giant cedar tree, which can grow to well over 200 feet tall! Our BCA consultant requires confirmation that the western red cedar is a … US codes set the maximum smoke developed classification for interior wall and ceiling finishes in most buildings at 450. 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. For many people in the US this is what comes to mind when the word cedar is … Western red cedar, Thuja plicata. It concerns structural graded timber in vertical uses with mean density upper 0.35 and thickness upper 22 mm. Nails and screws used to fasten Western Red Cedar should Dimensionally stable, it takes paint, stains or varnishes easily. 0000001340 00000 n Get this from a library! Cedar and pine are two common options used for many building projects, both of which have a variety of subspecies scattered around the world. 0000005160 00000 n 0000002446 00000 n 15% is the average equilibrium moisture content of wood during the summer in the Pacific Northwest. Nails and screws used to fasten Western Red Cedar should Smoke developed classifications reflect the amount of smoke released by burning material. American softwoods have the strength […] Sizes of rough and dressed Western Red Cedar are shown in Tables 1 and 2. Building codes in North America generally define as interior finish any exposed material that forms part of the building interior. Modulus of Elasticity of Wood, Wood Engineering Design Data. For many people in the US this is what comes to mind when the word cedar is … 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. For example, you could have a Number 2 structural grade that also has an A & Better appearance grade. SP-37R) Co-published by Western Red Cedar Lumber Association and Western Red Cedar Export Association. 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. 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. Western Red Cedar’s open cellular structure helps to absorb and dissipate sound energy, making it effective in confining noise. Cedar's low density enhances its insulation value and makes it an easy wood to transport and handle. Flame spreading ratings describe the surface burning characteristics of interior finishes. 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. Heartwood varies from dark reddish brown to a pinkish color and has excellent weather-resistant properties. They are used to regulate the use of interior finish materials to reduce the probability of rapid fire spread. )6f���e��F�y:��lݳ�_�WU�Q���4�:d,��֭� [W����%���١`1�� ���5.�L� �������)!qM sCf�^�;��(��Ӂ��c����_�Q���3E�����V�q���' WQ�Y��q~OL���A�Օ%���e Western Red Cedar’s thermal properties include: A … Western Red Cedar has flame and smoke development ratings that are higher than most in its class. Western Red Cedar’s flame spread rating and smoke developed classification compare well with the ratings of many other species of both softwood and hardwood. 12% is the summer average equilibrium moisture content in most areas of the US. 3. 0000001686 00000 n The results showed that all of the species investigated can produce structural timber, but that western red cedar has the least desirable properties … Shrinkage does not begin until the fiber saturation point is reached. Western Red Cedar Beams Full dimension beams. The heartwood ranges from a pale brown through to a richer dark brown. Materials are burned in a test furnace for a relative assessment of flammability. For nominal widths, thicknesses and grades of some commonly available Western Red Cedar lumber products, see the Cedar Products section. Western red cedar is a large softwood that grows in British Columbia and some of the nearby western states of the USA including Washington, Oregon, Montana and Idaho. Floor, ceiling and wall assemblies of wood can provide effective economical sound insulation and absorption when properly utilized. 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. The flame spread rating for Western Red Cedar is 45 (Class B rating). Includes bibliographical references. When used as exterior cladding, Western Red Cedar keeps buildings cooler in summer, while cutting heating costs in winter. The Standard Species Combinations for structurally graded Western lumber are also shown on this page. 0000002606 00000 n British grown western red cedar generally has similar properties to material imported from North America. The trees themselves rarely exceed 8" dia. 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. C. libanotica Loud. Cedrus deodara Loud. Western hemlock is increasing in the esteem of lumbermen. Their properties are similar to savin juniper. Trucking from the west coast, and the general higher cost of cedar vs. pine will put a dent in your wallet. 0000001920 00000 n Characteristic values of mechanical properties and density were determined and indicative yields for different strength classes were calculated. US codes set the maximum flame spread rating for interior wall and ceiling finishes in most buildings at 200. Visually, western red cedar is favoured for its rich and inviting colours. Environmental. Customers who choose western red cedar are reducing their material consumption versus other building materials. 4 knots per 12’ of board is allowable. Western Red Cedar lumber is available in visual stress grades for construction and finishing uses in a range of lengths, widths and thicknesses. 8" x 8" x 20' (240") = $300 each - Qty 1 2" x 12" x 18' (216") = $125 each - Qty 1 - clear grain Believed available from well-managed sources. ��(p�Z� Western Red Cedar is used to manufacture a range of specialty products such as siding, paneling, structural decking and outdoor decking. It is non-resinous and has a strong spicy scent. Cedar trees fall under the Cedrus genus and the Pinaceae family, which is the family of treesthat is coniferous. This is due to its high proportion of air spaces and its low density. For structural applications, Western species readily combine into six Species Groups, shown below. 2. Review specification options of Western Red Cedar, including lumber and appearance grades, as well as compatible fastener selection. As Hokie says, Eastern Red Cedar is a juniper. 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. Return to main Cedar page. Cedar is a type of coniferous wood, meaning that it is classified as a softwood and its cones/needles remain all year round. The inherent strength of plywood also offers the added benefit of giving increased structural … Fasteners should be corrosion resistant such as aluminum, hot-dipped galvanized or stainless steel. Its exceptional working properties like natural resistance to termite, rot and decay make it an ideal choice for outdoor applications. Douglas Fir, Ponderosa Pine, White Fir and Western Red Cedar are the most common single species sold as dimension lumber products. Demonstrate Western Red Cedar’s versatility as a building material through three case studies 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. SP-37R) Co-published by Western Red Cedar Lumber Association and Western Red Cedar Export Association. Medicinal and Other Uses for the Western Red Cedar. Natural resistance to deterioration has long made Western Red Cedar the premier choice for either interior or exterior home use. Western Red Cedar especially is superior to steel, concrete, and brick in this respect. Medium-to-fine texture. Distribution. Western Red Cedar is particularly effective in this regard and can be used to help reduce noise or to confine it to certain areas. 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. 1972 . 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. 0000025703 00000 n 0000026040 00000 n 234 0 obj <> endobj xref 234 21 0000000016 00000 n changeable in that they share performance properties and are similar in appearance. (Special publication, ISSN 0824-2119 ; no. Click here to request a quote - we offer VERY competitive pricing! Softwoods have been exported from the United States for over 400 years. Domestically, both pine and cedar are harvested mainly in the Northwest. American softwoods have the strength […] 8" x 8" x 20' (240") = $300 each - Qty 1 2" x 12" x 18' (216") = $125 each - Qty 1 - clear grain Western Red Cedar offers the advantages of natural beauty, design flexibility, exceptional dimensional stability and long term durability. ¬ The cell structure converts the sound energy into heat by friction and viscoelastic resistance. Cedrus atlantica Manetti produces Atlantic or Atlas cedar, a native of Algeria and Morocco. No 2 & Better – A grade offered generally for Western Red Cedar timbers and beams when the finest quality rough lumber is desired. The cost of logging western hemlock is ordinarily high as com- The conduction of heat in wood is directly related to its density. Cedrus libani Loud. The essential oil of red cedar is toxic. It is also a recognized structural material with known mechanical and physical properties. Western red cedar, an ornamental and timber evergreen conifer of the cypress family (Cupressaceae), native to the Pacific coast of North America. British grown western red cedar generally has similar properties to material imported from North America. An important acoustical property of wood is its ability to damp vibrations. Characteristics & Properties of Western Red Cedar, characteristics-properties-of-western-red-cedar. Western Red Cedar Beams Full dimension beams. ... are ASTM Standards D 2555 and D 245 for clear wood-based properties, and D 1990 for full-size test specimens. Important structural properties of four Western softwoods : white pine, sugar pine, western redcedar, and Port-Orford-cedar. The appealing dark colour, light weight and soft texture makes … 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. Of all available softwood species, cedar tends to be one of the best 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. 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. Cedar has a long history of withstanding the rigors of time and weather. Make sure stainless steel fixings are used, however! An infusion of the leaves has been used in the treatment of stomach pains and diarrhoea. 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. Western red cedar also delivers impressive acoustic properties. However, it has a very low shrinkage factor and is superior to all other coniferous woods in its resistance to warping, twisting and checking. Radial shrinkage applies to the width of vertical grain lumber: tangential to the width of flat grain lumber. The size differential between dry and unseasoned Western Red Cedar is given in Table 2 (in the Product Selection tab). When a material has good thermal conductivity, it means that it can keep buildings warm in the winter and cool in the summer. Only a couple of species of Cedrus exist in the world, but they exhibit certain traits that make them very popular. Western Red Cedar is the largest and most abundant of all cedars in managed forests. Western red cedar will remain dimensionally stable under most weather conditions and is not prone to shrinkage or swelling. These astounding properties protect the building from the extreme heat and cold. I believe red cedar will cost more than twice as much in Western Mass for a log home. Wood has a cellular network of minute interlocking pores which converts sound energy into heat by frictional and viscoelastic resistance. 1. If you don’t care to keep up with the maintenance than red cedar may be a good choice. Cedar is a type of coniferous wood, meaning that it is classified as a softwood and its cones/needles remain all year round. Of all available softwood species, cedar tends to be one of the best thermal insulators. 0000001705 00000 n The only notable difference is the natural durability which is rated as moderately durable (imported material is classified as durable). FOREST SERVICE . 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. Western red cedar. Battens and Screens Not listed in CITES. Introduction . 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. Detailed product information is available from the Western Red Cedar Lumber Association. �>�5�CO��4�����n�g�3�X�5j]X��Ȇl�VZ�N�1b!H�>�!a�خk-3R+�.Jk��Ms`�Ŷ��/J0� ��~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 0000001538 00000 n produces cedar of Lebanon, a native of the Middle East. Fasteners should be corrosion resistant such as aluminum, hot-dipped galvanized or stainless steel. Properly finished and maintained, cedar will deliver decades of trouble-free service. Here is an overview of the characteristics that determine the grades of Western Red Cedar: Clear Western Red Cedar. Not listed in CITES. The lower the flame spread rating, the more the material resists the spread of fire. Grain: Generally straight or spiralled. NLGA grades are approved by the American Lumber Standards Board of Review and are accepted under all US building codes. Western provides an impressive range of appearance, structural and industrial wood products destined for both local and international markets. 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 one of the most commercially valuable species. Colour: Yellow to a medium brownish colour. 0000004778 00000 n TS/RS ratio: Stability: Crushing strength *: Mean Std dev. Western Red Cedar’s stability makes it a very popular choice for pergolas and gazebos (provided structural support is not a requirement). Stumpage prices in 1927 were about one-third of those of Sitka spruce, western red cedar, and Douglas fir. Average Dried Weight: 575 kg/m³. 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. Growth, properties and uses of western red cedar (Thuja plicata Donn ex D. Don)/by Josefi na S. Gonzalez. Static bending strength *: Modulus of elasticity *: (*: at 12% moisture content, with 1 MPa = 1 N/mm²) % % % % MPa MPa MPa Note: WESTERN RED CEDAR wood tends to split. Shrinkage in both the radial and tangential directions is given in Table 3 (in the Product Selection tab). Western Red Cedar especially is superior to steel, concrete, and brick in this respect. It's stronger than Western red or Eastern white, but you're never going to find any large enough for rafters. 0000003840 00000 n In this article, I describe forty facts about the plant and the importance of the “tree of life” in the local culture. Structural lumber (including dimension lumber) is visually and/or mechanically (MSR) graded for its strength and physical working properties (appearance is secondary, unless specified). 0000002940 00000 n 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 used to manufacture a range of specialty products such as siding, paneling, structural decking and outdoor decking. %PDF-1.3 %���� Structural and Appearance grades can sometimes be combined as well. Detailed product information is available from the Western Red Cedar Lumber Association. 0000002737 00000 n information provided by the Western Red Cedar Lumber Association . Growth, properties and uses of western red cedar (Thuja plicata Donn ex D. Don)/by Josefina S. Gonzalez. Believed available from well-managed sources. Environmental. IMPORTANT STRUCTURAL PROPERTIES OF FOUR WESTERN SOFTWOODS: WHITE PINE, SUGAR PINE, WESTERN REDCEDAR, AND PORT-ORFORD-CEDAR U.S.D.A. 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. Softwoods have been exported from the United States for over 400 years. Alternate Combinations are available in non-structural grades. 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. Check certification status with suppliers. Cypress is one of the most versatile timbers available for use in exterior applications. Design values provided for Western softwood species manufactured and shipped by mills in the 12 contiguous Western states and Alaska. The following table is Structural Lumber Wood Engineering Properties. Battens and Screens 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. [B A Bendtsen; Forest Products Laboratory (U.S.)] Western red cedar. 0000002672 00000 n Woods with low density have the highest thermal insulating value because such woods contain a high proportion of cell cavities. There are few more versatile building materials than Western Red Cedar which is ideal both for indoor and outdoor uses. Our access to a diverse and unique species mix coupled with our unparalleled investment in manufacturing supports us in meeting our customers’ need for a consistent and reliable supply of quality products. rȋ8��/�Jy Comparative oven-dry densities of cedar and some other softwood species are given in Table 1. In this article, I describe forty facts about the plant and the importance of the “tree of life” in the local culture. Precautions and toxicity of red cedar. 0000004585 00000 n 0000001473 00000 n Durability As one of North America’s most durable woods, it lasts for decades and even centuries. 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. Characteristic values of mechanical properties and density were determined and indicative yields for different strength classes were calculated. It is seldom, if ever, used in modern herbalism. A decoction of the leaves has been used in the treatment of colds. 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. I. 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. Twenty years ago the species was considered as having practically no value. Forest Products Laboratory, Forest Service … Western Red Cedar’s stability makes it a very popular choice for pergolas and gazebos (provided structural support is not a requirement). Choosing the right type of wood for your project requires a little background knowledge of the traits of different woods. Euroclasses grading: END-USES ... and depth-effect adjustments are provided for Structural Decking. Cypress is one of the most versatile timbers available for use in exterior applications. ����{ᚏOS ^��\A(�O.���3U����x��������$�5͘q�[U�����[1�,f��lh_a��A|����������&y���M��[p(��s{���4�3)�s� �H5�2�;�x���'��,����S/“X��6w���0���y��@̶�A�R�][��P�hw�yK���M�͆.ۼ��^s��׃> Lengths are generally a few inches longer than the listed length. Clear, Vertical Grain – This is the highest grade of Western Red Cedar. Question: We have specified the use of western red cedar in an office building to be used as either wall and/or ceiling cladding. 6% is the average equilibrium moisture content for interiors of heated buildings. Detailed product information is available from the Western Red Cedar Lumber Association. It contains several terpenes, podophyllotoxin, safrole, estragol that could cause harm to … 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. Includes bibliographical references. 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. Cedar Sales offers a range of ceiling and wall designs that are engineer-approved to meet various acoustic ratings. Comparative oven-dry densities of cedar and some other softwood species are given in the Table 1 below. The wonderful properties of CedarWestern Red Cedar is quality, beautiful, durable, versatile, easy to use and maintain. 0000011118 00000 n 2. 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. ¬ The open cell structure of the timber is able to absorb and dissipate sound energy. syn. Acoustic properties. (Special publication, ISSN 0824-2119 ; no. 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. 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. It is non-resinous and has a strong spicy scent. While most trees decompose with a few years, this giant tree may take over 100 years to rot and return to the soil. Due to its soft properties, Western Red Cedar takes to machining very well, and it both screws and nails with good result. 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 can also cause damage of their own, when they break through concrete sidewalks or damage underground pipes. Wood has a strong spicy scent has a long history of withstanding the rigors of time and.., properties and density were determined and indicative yields for different strength classes were calculated destined for local. 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