osb thickness color chart

See the discussion of gable end wall bracing in the Silver designation of the, Brace the top and bottom of the gable end so the lateral loads are transmitted into the roof and ceiling diaphragms through horizontal braces. SYMBOL Tab Bar Type: For th selected Bar Type, you may customize the color and thickness of the bars. Although plywood panel prices have substantially increased over the past 18 months as well, the increases have been less than half those seen in the OSB market. Covers and / or ceilings. Text to Me. As for thicknesses: 6, 10.18 and 22 millimeters. Right-Wall-insulating sheathing is extended up to roof rafters and sealed around the framing with spray foam, Wrong The rigid sheathing seams are not taped and the gaps could cause moisture problems, Water Management System Builder Checklist Guide. IBHS Requirement for Compliance for Existing Homes. Right The coated OSB sheathing can take the place of house wrap to serve as the weather-resistant barrier because it is sealed at the seams with a paint-on flashing. Do you have a roofing question? OSB also doesnt have the soft spots that sometimes occur in plywood. $2.99 /sq.ft. Note that specifications for fasteners used with OSB are different in high-risk areas. Copyright 2014 - 2023 Roof Online. OSB boards offer a distinctly different appearance from other boards. PID Number. Schluter ALL-SET is a specialized, modified thin-set mortar for use as a bond coat within tile assemblies that is optimized for use with Schluter membranes and boards. It usually means different thickness but different manufacturers use different colors Fiberglass Reinforced Plastic (FRP) panels in 4' x 8' and 4' x 10' sheets with textured or smooth surface in a vast selection of colors. OSB-4. DOWNLOAD: LP SmartSide Lap Siding Coverage Chart() Back to list. There are three levels of Fortified Home: Fortified Roof focuses on the roof; Fortified Silver focuses on roof overhangs, opening protection, gable ends, and attached structures; Fortified Gold focuses on tying all components of the structure together. Building Code Performance Categories, Panel Thickness 7/16 CAT 0.418" (10.61 mm) 15/32 CAT 0.451" (11.45 mm) 1/2 CAT 0.483" (12.26 mm) 19/32 CAT 0.578" (14.68 mm) 23/32 CAT 0.703" (17 . $@%f:y_T?aW$RL[_Til @P Y\MNDr6Jib$%Rk+jj]LD7JB=F,s.;-=+y#6uK1C-hRTf%5=::MC`pzB*==nPAja/xzgz Both cost about the same to install, $70 an hour for a carpenter. OSB panels are available in a variety of common thicknesses and sizes as shown in Table 1, below. Gable ends must have structural wall sheathing (minimum of 3/8-in. Because of the manufacturing process, OSB is. Fortunately, McElroy's popular Max-Rib profile is available in five distinct options: Max-Rib Ultra, Max-Rib II, Max-Rib 100 . This goes for all other types of engineered wood panels as well. Minimum Thickness. OSB makes efficient use of forest resources, by employing less valuable, fast-growing species. Decorative furniture. Softwood plywood weight is further reduced by the presence of unfilled voids within the inner plies. It is made with similar manufacturing techniques, but the end product is cheaper, weaker, and of lower density. When wet, OSB swells and can cause roofing materials or exterior finishes to buckle. Wrong When insulated sheathing is installed correctly, you should not see daylight. The thickness of OSB that you need varies on where it is used in a building. Premium performance. Anchor the covering at the top of the stack, but keep it open and away from the sides and bottom to ensure good ventilation. 0 v Schluter ALL-SET is smooth and creamy, as well as easy to handle and spread. Excellent resistance and high load capacity. This does not mean that they cannot be purchased in different sizes or even OSB when cut. See Pressure-Treated Plywood at the Home Depot.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'roofonline_com-leader-4','ezslot_16',887,'0','0'])};__ez_fad_position('div-gpt-ad-roofonline_com-leader-4-0'); Softwood Plywood: This is the type of plywood most commonly used in construction. Because it uses leftover wood material, OSB tends to be cheaper than plywood, and it is more uniform since it has none of the knots and other defects that may be present in plywood. OSB is the most-used sheathing material for new roofs and roof replacements. It was invented by Armin Elmendorf in California in 1963. Plywood is composed of approximately 92% 97% wood, with the remainder made up by primers, sealants, and adhesives such as phenol formaldehyde resin. OSB built for load-bearing strength in construction. This type of machining facilitates the joining of several plates, one after the other. They may include steel connection plates or straps. The grade stamp on a panel also tells you a lot about the panel the span rating, exposure rating, panel thickness and the building code approval the panel meets. Span rated sheathing 24/16 (Roof/Floor on center spacing) Skid resistant on one side. %%EOF plywood or OSB or equivalent). (Exception: 3/8 for gable end walls structural sheathing.). This is because the process of manufacturing engineered wood destroys any live organisms in the wood. Hardwood Plywood: At least the front and back veneers (outer plies) of hardwood plywood will be made of a hardwood species such as maple or oak. Oriented Strand Board (OSB) A versatile engineered structural panel often used for floor decking and wall/roof sheathing. Nail holes were also left unplugged. The colors and numbers of stripes will vary. osb thickness color chart For heavier loads - a 40/20 rated panel (19 . 2018 - 2023 APA The Engineered Wood Association. Cover the stack loosely with plastic sheets or tarps. Marine Plywood: Despite its name, this is not a waterproof plywood. It is a very common and common product, at least in North America and Europe. Marine plywood is designed to be used where the material will be subjected to higher-than-normal amounts of moisture, such as marinas and other coastal environments. These prescriptive methods of retrofitting are intended to increase the resistance of existing gable end construction to out-of-plane wind loads. Structural for use in a humid environment. A typical 4 x 8 sheet of 1/2-inch Softwood Plywood weighsaround 43 lbs. 3) N.R. For instance, while plywood is typically 90% to 95% wood, OSB might only contain 80% wood. OSB may have a rough and variegated surface with the individual strips of around 2.5 cm 15 cm (1.0 by 5.9 inches), lying unevenly across each . Wood frame exterior walls must be fully sheathed, including areas above or below wall openings, with minimum 7/16-in. Go ahead and call it if you have any questions! In large-scale commercial construction, OSB has largely replaced softwood plywood in wall sheathing, roof sheathing, and subflooring applications. As for thicknesses: 6, 10.18 and 22 millimeters. This is because after it's manufactured, plywood shrinks as it dries. The unlimited slope in the chart below only refers to the potential maximum installation slope. This type of plywood is made up entirely of birch wood, so unlike some other hardwood plywood, it does not use softwood for the inner plies, and the inner plies are void-free, increasing its stability. After the trees are harvested, the logs are washed and debarked before being fed into a flaking machine that turns the wood into strands. scottsdale az obituaries august 2021; steve biko death scene. Access a complete list of APA publications about OSB in APA's Resource Library. k%rF);J):5OpPgI59dROhydDM4L5p^m}o: The answer may seem ambiguous. In the interior OSB panel layer or "core layer" strands are oriented either randomly or across the short axis of the OSB panel. More Photos Features Standard FRP. Workability. A 4x8-foot sheet of construction-grade plywood costs roughly $10 a sheet, while the same size sheet of OSB costs only $6 a sheet. Most OSB is manufactured with a rough side and a smooth side with "this side down" stamped on the smooth side. Thickness of plywood ranges from 1/8 inch all the way to 1 inches. Actual Width. MDF: Medium Density Fiberboard is produced from wood scraps left over from other wood product manufacturing activities. Cross-laminated timber (CLT) is a large-scale, prefabricated, solid engineered wood panel. Thickness. R602.3.5 Braced wall panel uplift load path. So, when you are buying a standard utility-grade sheet, the actual size will be as follows: 1/8 inch = 7/64 inches. Structural wood sheathing shall be extended to lap the sill plate and nailed to the sill plate using a 4-inch on-center nail pattern along the edges. Specialized construction situations requiring installation of roof sheathing panels with the strength axis parallel to supporting structure also benefit from the use of Structural I sheathing. Virtually every part of small trees grown on sustainable tree farms is used, meaning very little waste is produced in OSBs manufacturing. Product Specifications Available Sizes: 47-7/8 x 95-7/8 panels (Longer panels and custom thicknesses are also available. What thicknesses does OSB come in? The first attempts to obtain such a plate were developed in the 1950s, without much success. OSB is considered an Exposure 1 panel, which means they may be used for applications where construction delays may be expected prior to providing protection. Table 2, titled Guide to APA Performance Rated Panels, explains how each type of sheet should be used. Overview of Normal Minimum Thicknesses for Different Uses: 9 + 10mm: packaging, protective panelling, furniture The following authors and organizations contributed to the content in this Guide. Plywood, OSB, particle board, etc. The final manufacturing step is pressure and heat curing. It is due to its rough surface. Sometimes, also species with leaves, like poplar or even eucalyptus. Pressure-Treated Plywood: This is usually a softwood plywood that has beenpressure-treatedto help it resist decay caused by fungus, insects, and other organisms.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'roofonline_com-leader-3','ezslot_15',888,'0','0'])};__ez_fad_position('div-gpt-ad-roofonline_com-leader-3-0'); Southern yellow pine is particularly well-suited for pressure treating, and most pressure-treated plywood is made from southern yellow pine. Common thicknesses for sheathing panels are: 5/16 inch (7.9 mm), 3/8 inch (9.5 mm), 7/16 inch (11.1 mm), 15/32 inch (11.9 mm), 1/2 inch (12.7 mm), 19/32 inch (15.1 mm), 5/8 inch (15.9 mm), 23/32 inch (18.2 mm), and 3/4 inch (19.0 mm). Note: Gable ends that are not covered in this retrofit guidance include: Access to some references may require purchase from the publisher. The cost per panel depends mostly on thickness, ranging from 1/4-inch to 23/32-inch. Products shown . osb-4005s - Pisos de tablillas de madera dura y paneles estructurales de OSB Edge y Edge Gold; osb-4006 - Ceramic Tile Floors and Edge and Edge Gold OSB Structural Panels; osb-4004 - Floor, Roof, and Wall Panel Installation; osb-4005 - Wood Flooring Installed Over Edge, Edge Gold and Diamond OSB Floor Panels Plywood boards: characteristics, types and uses, How much does cost install laminate flooring? Because plywood is made of veneers that are glued and pressed together, unlike OSB, its more attractive and can be used for finish work. The mark signifies that panel quality is subject to verification through APA audita procedure designed to assure manufacture in conformance with APA performance standards or the standard shown in the mark. MDO: Medium Density Overlay is a type of exterior plywood specifically designed to be painted easily. LIBERTY SBS SelfAdhering Base/Ply Sheet Specs About Specs Docs Videos Get automatic Lifetime Protection on your entire GAF roofing system When you install any GAF Lifetime Shingle and at least 3 qualifying GAF accessories, you'll automatically get a Lifetime limited warranty on your shingles and all qualifying GAF accessories*. OSB Basics Some of these panel types require quite a bit more of these materials than other types. These uses for what OSB was designed for are structural: It is always advisable to allow the board to adapt to the environment where it will be placed. wood structural panels on both wall faces. (Source: Boxes, Crate and Reel Manufacturing, www.PerformancePanels.com). However, we can also find other types of OSB boards (which will always be included in some of the previous classes) that are sold with some additional features or modifications. To reset a chart that's been zoomed, double-click on the time scale or the price scale (whichever needs to be reset). The pressing parameters varied in some limits depending on the board thickness and type. If the door opens into the living room then the side and top edge adjacent to the door handle will be green the same as the living room side. (See IBHSs Gable End Wall Bracing Retrofit Section. OHLC Bars are drawn to show the open-high-low-close. Oriented strand board, or OSB, is a wood structural panel that can also be used for flooring. Exterior wall sheathing is more likely to be damaged or lost in hurricane-prone regions and other high-wind areas, leaving the house susceptible to wind and water intrusion. Plain sheets OSB-3 from Ultralam have dimensions of 2500x1250, 2800x1250, 2440x1220, 2500x625. In other words, for similar use and performance, it puts a little more weight on the structure. Panels classified as Exposure 1 are intended to resist the effects of moisture on structural performance as may occur due to construction delays, or other conditions of similar severity. Because its created from fast-growing trees, like aspen, maple and pine, its an environmentally friendly alternative to other wall sheathing materials. Both as a suitable support for a roof and as part of sandwich panels. $4.39/sq.ft. hb`````2g gah@b2~*5;413Gp/a`[q Latex paints are not recommended. You did not provide a valid email address. 10 0 obj <> endobj A publication highlighting recommendations that contribute to improved overall performance in the structural shell and focus on good connection details to tie together exterior walls, roofs and floors. Structural I, also referred to as STRUC I, may be OSB or plywood and is, essentially, a subcategory of APA Rated Sheathing. Learn more about how LP OSB Sheathing is made. Wood sourced through programs certified under the Sustainable Forestry Initiative, Available Sizes: 47-7/8 x 95-7/8 panels (Longer panels and custom thicknesses are also available. Although, on the other hand, they have disadvantages. Right Coated OSB sheathing provides a continuous air and moisture barrier around the home. The price of OSB has increased 510% since January 2020, exceeding the peak price increase in lumber by nearly 180 percentage points. Right Wood-to-sheathing joints are caulked so the sheathing can provide an air barrier for the home. South Loop Store. Here are standard thicknesses and their costs per sheet: 1/4-inch: $32-$37 7/16-inch: $34-$51 1/2 inch: $34-$51 23/32-inch: $50-$56 3/4-inch: $58-$77 OSB Cost Breakdown With integrated structural, water and air management layers, ZIP System products offer interchangeable options for optimal roof and wall performance. This appearance may be inconvenient for use in decorative applications, but the opposite has happened. Including Weights for MDF, MDO, and Particle Board, ByJack Gray, Roof Online Editor Last updated October 8, 2022. Pallets made with engineered wood are exempt from ISPM 15 regulations. OSB used for wall sheathing should be 7/16 inch thick. Thanks to their excellent properties, which include strength, stability and comparatively low price, they have become a reference not only in structural applications, but also in the world of decoration, where their striking and differentiated aspect plays in their favor. OFFICE of Never leave panels or the platform in direct contact with the ground. ), Make connections between horizontal braces and retrofit studs using metal straps and fasteners. High structural performance for use in a humid environment. _  7z>Ggh_eZV[I6N-6E:&$cz^0RS"'9 Sheathed in 1/4" plywood. OSB boards can be easily purchased from any lumber company. Before drying out, of course, it can be much, much heavier.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'roofonline_com-narrow-sky-1','ezslot_24',170,'0','0'])};__ez_fad_position('div-gpt-ad-roofonline_com-narrow-sky-1-0'); A typical 4 x 8 sheet of 1/2-inch Pressure-Treated Plywood weighsaround 60 lbs. PR-N612: Norbord Inc./West Fraser Timber Co. Ltd. Nominal panel thickness (Table B) assists in calculation of geometric cross-sectional properties. FEMA P-499, Home Builder's Guide to Coastal Construction: Technical Fact Sheet Series, Right Correct fasteners and nailing pattern for structural wall sheathing, APA Building for High Wind Resistance in Light-Frame Wood Construction. Right Coated sheathing is taped at all seams to serve as an exterior air barrier on the walls. If I have a living room door that leads into the hallway. They are there to mark what type it is. Video showing a technique for airtight sheathing installation on exterior walls using foam gasket strips. Because of the extremely high resin content, MDF tends to be one of the heaviest types of engineered wood panels.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'roofonline_com-mobile-leaderboard-1','ezslot_17',885,'0','0'])};__ez_fad_position('div-gpt-ad-roofonline_com-mobile-leaderboard-1-0'); A typical 4 x 8 sheet of 1/2-inch MDF weighsaround 69 lbs. If panels must be stored outside, stack them on a level platform supported by at least three 4x4s to keep them off the ground. Just another site osb thickness color chart This puts less pressure on forest resources, that is, greater use is made of the tree. (Exception: 3/8" for gable end walls structural sheathing.) The building code has a minimum requirement for the thickness of Traditional Hard Coat stucco, it is 7/8 of an inch. Use of this site is subject to certain Terms Of Use.. Local store prices may vary from those displayed. Also make sure that you get your supporting timbers at the correct spacing. Explore color to get inspired, or download the complete list. endstream endobj 11 0 obj <> endobj 12 0 obj <> endobj 13 0 obj <>stream Plywood weight is determined by the length, width, and thickness of the panel, as well as the wood species and the types and amounts of adhesives, primers, and sealants used to make the plywood. Each type of queue can add properties to the card. Types 3 and 4 are the most likely to be found in any lumber company. Three panel thicknesses with various dimensional options let you choose the right panel for each design and application. endstream endobj 15 0 obj <>stream Lots of chips and strips all glued together under high pressure with resins. This latex paint is an acrylic coating available in satin or gloss sheens, which gives floors tough, long-lasting protection. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'roofonline_com-netboard-2','ezslot_29',172,'0','0'])};__ez_fad_position('div-gpt-ad-roofonline_com-netboard-2-0');A typical 4 x 8 sheet of 1/2-inch Hardwood Plywood weighsaround 48 lbs. A typical 4 x 8sheetof 1/2-inchOSB weighsaround 54 lbs. These layers are combined to form OSB panels of the desired panel thickness. Blue Ribbon OSB sheathing panels contain no core voids, knots or splits and provide a quality base layer for wall and roof sheathing applications. Fire resistance. For disaster resistance, comply with the requirements defined by Fortified Home (Fortified Technical Resources). what does the person and plus sign mean on facebook; accenture past ceos; gus malzahn record vs alabama; marshall high school basketball; 1988 fresno state baseball roster Structural Sheathing (plywood/OSB) in Exterior Walls, Install structural sheathing in exterior walls to resist wind pressure. Please call (800) 964-6310 for more info. Sized for spacing (Panel width and length may vary up to 1/8" to aid with proper installation) Exposure 1 rated panel can withstand inclement weather during construction delays but it is not . Key recommendations (taken from the gable end wall bracing retrofit section of the IBHS High Wind Standard : Minimum requirements for use of the prescriptive methods detailed in IBHSs Gable End Wall Bracing Retrofit Section are as follows: Cases that are not covered in this retrofit guidance require that a licensed professional engineer design a gable end bracing system that will meet wind forces appropriate for the location. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. The hinge side of the door AND just the narrow/singluar strip of door frame the hinges are set in will always be painted the opposite . The U.S. Department of Energy has determined that 7/16-inch sheathing is the minimum appropriate thickness for structural wall sheathing with an exception for gable end walls, where the minimum thickness is 3/8 inch. Thickness. Thickness. Connections should be made at the top and bottom of the gable end wall. Panels designated Structural I must meet all of the manufacturing and performance standards of Rated Sheathing, as well as certain additional requirements. The second number is the maximum center-to-center spacing of supports in inches when the panel is used for sub-flooring with the long dimension across supports. is manufactured using adhesives, primers, and sealants. Hardwood plywood is commonly used in applications where these qualities are desired, like flooring, cabinets, or wall paneling. OSB wall sheathing comes in thicknesses ranging from 1/4 inch to 1 1/8 inch, but some of those dimensions are hard to find. 9.5 3/8 18 40 11 7/16 21 46 12 15/32 23 50 15 19/32 29 63 18 23/32 34 76 22 7/8 42 92 28.5 1-1/8 54 120 Notes: The finished boards are cooled, sanded and cut into varying lengths depending on their use. The right thickness for two walls is 12 mm to 15 mm. OfcR 0 0 Thickness. Structural I refers to certain specialized strength and stiffness characteristics of wood structural panels while the term Exposure 1 refers to the glue bond durability of a wood structural panel. Moisture resistance. Place one 44 in the center and the other two 4x4s 12 to 16 inches from the ends. &o_a-~K9SY The wood strands in the outer layers are oriented one way, and the strands in the interior layers are oriented the other way, which increases panel strength.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'roofonline_com-portrait-1','ezslot_31',110,'0','0'])};__ez_fad_position('div-gpt-ad-roofonline_com-portrait-1-0'); OSBis manufactured in a slightly different range of thicknesses thanplywood. 250 125 and 250 62.5 centimeters are the most common measurements. When precision is necessary, always refer to the specification sheet for the actual, specific product you intend to use, or contact the technical department of the panel manufacturer. If you need a piece count and neither of those are visible, please contact GP at 800-284-5347. Baltic Birch Plywood: This is a high-quality plywood traditionally produced in Russia and other areas around the Baltic Sea. Keep sanded panels and appearance-grade products away from high-traffic areas to prevent damage to surfaces. Right This homes above-grade walls are constructed in a factory where wall panels of 2x6 studs are assembled and sheathed with a coated OSB product, then windows are installed and flashed before shipping the panels to the site for assembly by crane. Construction of stands for fairs and exhibitions. hbbd``b`j~@q3`N,= R`XAH6Hd' 5@Bv#LF;? If moisture absorption is expected, cut steel bands on bundles to prevent edge damage. Limit 90 per order. Minimum Thickness. LP OSB sheathing can be used for wall, roof and flooring applications. drywall, 3/8-in.-thick plywood, or plaster installed over wood lath. According to SBC Magazine, the strength axis is the direction that is parallel to the grain and indicates which way a panel should be installed. It is mandatory to procure user consent prior to running these cookies on your website. View More Details. The Compliance tab contains both program and code information. OSB is produced in huge, continuous mats to form a solid panel product of consistent quality with no laps, gaps, or voids. given in our weight tables are meant to provide a general idea of typical engineered wood panel weights, and should not be used if precise values are needed for critical engineering calculations. This category only includes cookies that ensures basic functionalities and security features of the website. The strands in each layer are all generally oriented in the same direction. Installing either sheathing over a 500 square foot area would cost roughly $160 in material for plywood and $100 for OSB. OSB is not recommended for outdoor projects. To ensure success for the complete wall system (from cladding to dry wall), please view the Building American Solution Center Guides on the following topics: Also see if local building codes have specific requirements or ask the local building department. Case study, Hard and Soft Woods: List and classification methods, Paulownia or Kiri Wood. READ THE BEST ANSWERS FOR THE BEST QUESTIONS. Designed by Elegant Themes | Powered by WordPress. (See code for additional requirements and exceptions.). 250 125 and 250 62.5 centimeters are the most common measurements. Autor de la entrada Por ; Fecha de la entrada godal duble farsi 210; new restaurants coming to hemet, ca . Blue Ribbon OSB sheathing panels contain no core voids, knots or splits and provide a quality base layer for wall and roof sheathing applications. So in the above scenario, the hinge side would be blue. Another type of classification is conditioned by type of glue used joining wood chips. Densglass Technical Guide - Gypsum, Wood, Lumber, OSB Boards Start with the lightest load available. No form of intermittent bracing (e.g., metal strapping) shall be allowed on an outer wall. The wood strands in the outer layers are oriented one way, and the strands in the interior layers are oriented the other way, which increases panel strength. structural sheathing panels are required for gable end walls. Next, determine the OSB thickness. Relative to their strength, OSB panels are light in weight and easy to handle and install. For general use and indoor applications (including furniture) used in a dry environment. Available Profiles Cedar Texture Smooth Finish See It In Action Request a Quote ExpertFinish Colors Looking for color? Shakes & Shingles Perfection Shingle. 30 min at 70 F between coats. wood structural panels. Wood sourced through programs certified under the Sustainable Forestry Initiative. Code language is excerpted and summarized below. See Figure 1. Gable end wall bracing is also a requirement for the silver designation in theFortified Home program conducted by the Insurance Institute for Business and Home Safety (IBHS) offers guidance, best practices, and voluntary construction standards and programs for building in disaster-prone areas including hurricane and high-wind zones. Due to its extremely smooth surface, it holds paint better, and looks better after being painted, than other types of engineered wood panels.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'roofonline_com-mobile-leaderboard-2','ezslot_18',884,'0','0'])};__ez_fad_position('div-gpt-ad-roofonline_com-mobile-leaderboard-2-0'); The wood plies in MDO panels are typically softwood, and a thick, smooth layer (the overlay) of a highly water-resistant resin is applied to either one or both sides of the panel. But OSB is not suitable for long-term exposure to the weather. Your email address will not be published. Leaning. 2) Product suggestions may not be suitable for all types of base materials. Relationship Between Span Rating and Nominal Thickness for OSB(a) Nominal Thickness(b) (in.) The rating stamps for plywood and oriented strand board (OSB) lumber are provided. Does GP's wood come from sustainably managed forests? Jeff_Clarke | Aug 10, 2008 04:49pm | #18. PR-N213: Norbord Inc./West Fraser Timber Co. Ltd. PR-N136: Georgia-Pacific Wood Products LLC, ESR-2586: APA The Engineered Wood Association. This is due to the natural process of expansion / contraction of the wood in the face of changes in the degree of humidity. However, they are immune to insects in the larval cycle, such as woodworm. Thickness: 0.07-0.05%. See IRC Table R602.3(3)belowfor minimum wood structural panel span length, thickness, nail size, nail spacing, nail penetration, and stud spacing for the various wind exposure categories.

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