Modern chemical baths and pressurization began in the early half of the 20th century. #2 Prime grade southern yellow pine. This specific set of data for each charge is called a charge report. I noticed that a 2x8x16 is 5 bucks less a board at HD than the quote that a lumber yard gave, but everything the lumber yard quoted is ground contact. Using expensive wood that is naturally resistant may not fit the budget. 2 lumber, which provides good strength at a reasonable price. However, some KD-HT wood at your local lumber yard might have a tag on the end of the lumber that specifies PT. PDF AC2 Pressure Treated 8:16 - Midwest Manufacturing Some lumber is also treated for fire protection and used throughout different areas of residential, commercial, and industrial construction. In the 19th-century railway companies used creosote to coat railway ties and timbers for bridges. Here is a list and description of some of them. In ancient times the Greeks used olive oil, the Romans tar, and others used pitch or lye. Research shows that Southern Pine can be expected to last for many decades when properly treated and installed for its intended use. Its appearance ranking is 80% or better clear of defects. It has a grain slope of 1 in 12, may have seasoning checks, and tight, well-spaced knots up to 2-1/4 on a 28. Tell us how were doing! No.2 Prime Get the latest This Old House news, trusted tips, tricks, and DIY Smarts projects from our expertsstraight to your inbox. It is used to build exterior stairs, for posts, sheathing, siding, porches, decking, and railings too. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Penetration is verified on-site by the third-party inspector before sending the assay zones to the agency laboratory for retention analysis. No. The stamps on lumber do not always include everything, the PT data is usually just on one of those plastic tags stapled on the end of the board which gets cut off or removed. Construction grade commonly refers to #1 grade lumber. However, the tight grain also makes it less receptive to pressure treatment. Like all lumber, the fewer knots, blemishes, or defects, the higher the grade. Once on the drip pad, the material will stay until it is dry enough to be moved into the plants treated inventory. The International Code Council Evaluation Service (ICC-ES) similarly approves preservative systems through its Evaluation Service Reports (ESRs). Ill suffer with pt. Eugene has been a DIY enthusiast for most of his life and loves being creative while inspiring creativity in others. It was widely used as a preservative from the mid-1930s to 2004. Treating systems treated under an approved ICC-ES ESR allow code officials the option to accept these products as equivalent for meeting code, as referenced above. SPIB performs these functions through the accreditation of the American Lumber Standard Committee (ALSC) as appointed by the Department of Commerce. The kd19 is the customers assurance that it was dried to the proper level before it left the plant. CCA is comprised of arsenic, chromium and copper. The size, location, and the number of knots and other defects, and the slope of the wood grain affect the structural strength of lumber. Charges that are documented as conforming for penetration and retention by IQC results are subject to re-inspection by the agency to verify penetration and retention. Building codes, inspectors, builders, engineers, and other professionals use the grades to make sure structures are safe for use. It's easy to work with. I did some research and found that they only staple the PT label to the end of the boards in many cases. For additional information on the proper handling and storage of pressure-treated Southern Pine materials,click here. Additionally, all cuts and drilled holes should be treated with preservatives to prevent damage to exposed untreated wood. Those and other treatments are used for industrial purposes instead. The appearance doesnt affect the structural grade, it just is superficially more appealing. SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. Most of this new treated lumber looks untreated as compared to the old green stuff, I did learn that they add color to some of it to try and make it look more like treated. Inspection Practices for Treated Lumber Products. Identifies the accredited agency or association that oversees grading accuracy, in this case the National Lumber Grades Authority. Gloves protect against slivers and water-soluble chemicals; it is also advisable to thoroughly wash hands before eating or drinking. I do like to cover the tops of the joists and beams with ice and water shield. Even if you are on the right track, you will still get run over if you just sit there. These requirements are initially checked by the producing treating plant, but are ultimately verified by independent, third-party agencies that ensure plants produce treated wood products in accordance with industry standards. Pressure treated plywood is also available in thicknesses from 1/4 through 3/4. Home Derpo person said that #2 is ground contact and stronger. Office: (850) 434-2611 | Toll Free: (800) 995-7742 THIRD-PARTY AGENCY AUDIT and SAMPLING PROCEDURES. Treated posts or ties readily available at yards and stores are 35, 44, and 66; 88 is also available but may be a special order. It appears as a new technology from Canada. It is most commonly used for sheathing and applications where a fine finish is not required. THE TREATING PROCESS, QUALITY AND IQC RESPONSIBILITIES. hb```"/VI ealR]2L 7] u~m>^;+g=ll&Cv)!N&%5g~IK1 This approach is intended to consider the big picture trends as opposed to allowing otherwise isolated issues to severely affect plant performance status. SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. JavaScript is disabled. PDF Pressure-treated Southern Yellow Pine The wood then is dried naturally or in a kiln to evaporate the water out, leaving the preservatives behind. An excellent decking grade that can be used face side down for roof decking or face side up for floor decking. . Commonly used for joists, trusses, and other load-bearing applications. Douglas fir has a tight close grain cell structure making it stronger and less prone to warping and twisting than pine. maple, oak, birch, etc. The cores are then dried and ground for the purpose of analyzing the dust by x-ray, titration or gas chromatography methods. H|TnT1}W1yi= hEN4Kg8 bvlbh%gCXcX]NDRnFiUH>.Sl6Vi\(f^j+d}IT#h3Si [j6sG1Pbh`sX9W.+|FdqvJY/nm Sd@{D Wood Packaging Material (WPM). Excellent for painting or natural finish where requirements are less exacting. There is no structural premium grade, it is strictly a term for bright looking wood free of blemishes or knots. Pressure treated lumber has been infused with preservatives to prevent rot and insect damage. Box 10915 Pensacola, Fl. The stapled on label will have w/CE to indicate with color enhancement, she is correct. the Southern Pine Inspection Bureau (SPIB) Standard Grading Rules for Southern Pine Lumber. This double treated Ground Contact lumber must be used for applications where treated lumber is difficult to maintain, repair or replace. *Load duration factors greater than 1.6 shall not apply to structural members pressure-treated with water-borne . Lumber may have one hole every 3 and any splits must not be bigger than the plank is wide. A high-pressure period is then undergone to push the preservative deep into the wood. The recommended type of treated wood for in-ground use is UC4B and UC4C; UC4B has a higher retention level than lower graded types, and UC4C has even more. He is passionately interested in home improvement, renovation and woodworking. 2 in. x 12 in. x 8 ft. #2 Prime or Better Ground Contact Pressure Lumber that is 2 or less in thickness (24, 26, 5/4 decking, etc.) Each American Lumber Standard Committee (ALSC) certified agency has its own registered grade-mark. Some types of timber have natural abilities while others need a boost. It often links with the logo or symbol of the association that oversees the grading at that mill. Lumber Grades - ProWood lumber SYP holds almost 85% of the U.S. pressure treated market. Knots must be well spaced and tight, so they wont fall out, and no larger than 2-3/4 in a 28. The grade mark can include "1W" or "2W" if visually graded to the wane requirements for No.1 or No.2 dimension lumber, respectively. Lumber, posts, and ties range from 8 to 16 in length, although longer may be ordered. The treating process includes an initial vacuum to remove the excess moisture and air to aid in the absorption process. Tom saves money by ordering S-GRN wood when framing a new house, figuring that all the wood will air dry at the same pace. No.1 Prime No.2 Prime H ighqu al ty, m ed nc r sfo . #1 is better. ehV$W'A An indicator is used to identify the untreatable, heartwood sections of the 20-core sample (Sapwood is the outer portion of the log; heartwood is the innermost portion of the log and is rarely capable of accepting preservative). #1 grade can have more wane (or bark) The HD guy is wrong. Southern yellow pine in the eastern U.S., spruce pine and fir in the northern U.S. and eastern-central Canada, and Douglas fir, fir, and hemlock in the western U.S. and Canada. Pressure treated wood has many outdoor uses and even is used in some indoor locations, especially where moisture may be a concern. Recommended where a combination of economical construction and good strength is desired. The unique cellular structure of Southern Pine permits deep and uniform penetration of preservatives, rendering the wood useless as a food source for fungi, termites and micro-organisms. 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. While all species are graded at the same four levels of strength and appearance, they are not equally strong. Recommended for same purposes as Construction grade. The pressure-treatment process Timber components, machined to their finished dimensions and at an appropriate moisture content, are impregnated with preservatives in large pressure vessels, where the combination of vacuum and high-pressure drives the preservative into the wood. However, they make an ideal solution for use in arid or dry locations. @_10ip CzHrGfnl~Frc>fkH 2X [ ^ endstream endobj 140 0 obj <>>> endobj 141 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/TrimBox[0.0 0.0 595.276 841.89]/Type/Page>> endobj 142 0 obj <>stream Fax: (850) 434-1290. A number that identifies the mill where the lumber was produced. Good appearance, but graded primarily for strength and serviceability. Maximum spans were calculated using design . WestWood Heat Treated Lumber Production Corporation vapor-stabilization technology is a patented wood heat treatment technology, utilizing a natural thermochemical reaction and steam at temperatures of 230-240 C (450 F) and exclusive of any chemical additives. An internet search says it has to do with less knots and quality, and that #1 is of higher quality. The greater the content of preservatives denotes the type and use of the treated wood. Many homes have fences, retaining walls, and garden boxes constructed of treated wood, and even the wooden utility poles supplying power and communications are pressure treated. Lumber must be stamped for strength by a trained inspector and identified with a legitimate stamp. #1 #2 prime etc deals with the quality of the board. There are many questions about the different treated wood products in our market today. Usable lengths suitable for bracing, blocking, bulkheading and other general utility purposes where strength and appearance are not a consideration. http://www.ecoprem.com/pdf/ecoprem_wood_technology_competitive_analysis.pdf. Most is not. In most cases, the required depth of penetration is 2.5 or 85% of the available sapwood. But using bigger joists of a cheaper species might save you money without loss of strength. The table below identifies the main differences. Ground contact level treatment (.15 pcf) has more than double the preservative of above ground level treated wood (.07 pcf) Lighter, more natural wood appearance for improved staining qualities. Application of the product requires pressure treatment by an approved treating process and preservative for marine usage. Got the ledger #2 GC from the lumber yard. UC3B or UC4A are best for ground contact use. This information will then be combined with previous plant data to determine the plant performance status, as mentioned above. Raised floor homes look great and protect homeowners against risks from flooding and subsiding soils. See Finish grades for face side; reverse side wane limitations are lower. Got your hard hat and high-vis vest? These factors, plus the moisture content at the time of milling, determine the grade assigned. The amount of chemical retained determines how resistant the lumber will be. Today, pressure treated lumber for residential use is commonly pine, spruce, or fir that has been immersed in a water-based chemical bath of preservatives. So, weve covered a lot of ground, but this is not the end, not by a long shot! Im not going to struggle with huge bows and twisting. Here are the grades and types of lumber most commonly available, plus the percentage of clear wood you could expect for the appearance market or grade: Lumber with few or no knots or blemishes may be called premium by some mills or retailers to capitalize on DIYers wish for better-looking lumber. Superior product suitable for a wide range of uses including shelving, boxing, crating, and form lumber. Free of pitch pockets, pitch streaks and medium pitch on one wide face, but otherwise conforms to No.1 Dense or No.1 Dimension Lumber. When pressure treated it is resistant to decay and termites. It has anti fungal properties along with a host of other positive features. Lumber stamped #2 grade is commonly used for framing, lintels, rafters, trusses, joists, beams, and fencing. Lumber Grade Stamps - InterNACHI - International Association of Different chemicals have been used in the preservative bath, with changes being made to limit health risks to humans and animals. 3 (lowest strength, not pretty). The chemical treatment makes the wood resists insects, mold, mildew, and rot but not moisture-proof. Follow along as we decode the stamp and show you how to get the most lumber for your money. The dry wood is loaded into a treatment cylinder which is then sealed and depressurized to vacuum as much air as possible from the wood cells. While each charge is evaluated on its own merit, it is important to note that overall evaluation of plant performance is done over the most recent 20 samples. Georgia-Pacific Corporation Pressure Treated Lumber - GlobalSpec There may be a secondary stamp that identifies the visual grade as Premium or Select A, B, C, or D. Pressure treated lumber also has an end-tag stuck or stapled to one end. It is a very strong and stiff softwood, and dense too. We think it is only appropriate to attempt to describe these grades for your reference to help you better understand what you currently stock and what is additionally available to you and your customers. Use in-ground type lumber where there is a greater risk of deterioration or severe environmental exposure, or for critical structural components like foundation posts, exposure to fresh or groundwater, or utility poles. To limit the entry and spread of quarantine pest through international trade, the International Plant Protection Convention adopted the International Standards for Phytosanitary Measures Guidelines for Regulating Wood Packaging Material in International Trade (ISPM 15). Larger sizes conform to Dense Structural 72 Structural Lumber except for dense grain requirement. Kiln-dried wood is crackproof but pressure-treated wood is not guaranteed against warping, shrinkage, or splitting. Generally clear, although a. SPIB is subject to continual review by IAS to ensure that the laboratory and agency records remain in compliance. Recommended for general construction uses. PDF Strength Treatability Beauty - Teague Lumber Please keep in mind, that with the advent of prime grades, the differences between the grades of lumber have become even more defined and distinct. SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. Description & Documents #2 prime southern yellow pine with virtually no wane CA-C Above Ground pressure treated exterior wood protected by Ecolife (EL2); a stabilizing formula that repels water keeps boards straighter and looking better longer Ecolife (EL2) provides built-in water repellency that lasts for up to 3 Largest hole permitted is 1/16". For outdoor seating. Working with pressure treated lumber is similar to working with untreated planks. The current process is mostly computerized and mechanized using modern technology. Im building a deck and am getting conflicting info on the difference between #1 and #2 PT. As I understand it, the grade refers to the number of knots in a given length. Grade based on No.2 Dimension Lumber except wane and other characteristics that affect appearance are limited. Framing lumber, unlike money, does grow on trees, so theres always the chance it will have some natural defect, such as a large knot or a long split, that can reduce its overall strength. The unique cellular structure of Southern Pine permits deep and uniform penetration of preservatives, rendering the wood useless as a food source for fungi, termites and micro-organisms. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! I guess it is just a regional thing. IQC results of treatment for each charge are required to be documented in the plant records to correspond to the individual charge reports. It must specifically be labeled ground contact. Green unseasoned lumber fresh from the mill is labeled either air-dried (AD) or surface-green (S-GRN). From the cedar shakes, facia, and trim of a house to the sill plate and wooden foundations or supports, pressure treated wood is common in residential construction. #2 Prime Grade has a maximum hole size of ". Wood packaging material made of unprocessed raw wood is recognized as a pathway for the introduction and spread of pests. Appearance is same as C Finish for thicknesses of 4" and less and widths 12" and less. Best appearance (compared to Standard) High-quality lumber Smaller and fewer knots Standard Grade: Use when a rustic appearance is desired. WWPA offers a heat treatment certification program for mills to stamp qualifying lumber with the KD - HT mark. Machine Stress Rated (MSR) lumber is evaluated by mechanical stress rating equipment. See SPIB Special Product Rules for design values, Appearance is same as B&B Finish for thicknesses of 4" and less. There is no standard for appearance grading and select or premium could be #1 or #2 structural grade, it just increases the cost to the consumer for better wood. Pro Note: All copper-based wood preservative solutions will corrode unprotected iron and steel brackets and fasteners. It has a unique broad grain cellular structure that allows for uniform and deep penetration of chemical preservatives. Wearing safety glasses or a shield protects the eyes from dust and debris when drilling, cutting, or sanding, and a dust mask will prevent inhalation of dust and chemicals. No.2 Non-Dense No. The wood should be at least 6-inches above the ground, have good air circulation and drainage, and the components can easily be replaced. Southern yellow pine (SYP) is very strong and is common in the eastern U.S. A mixture of spruce, pine, and fir (SPF) dominate much of the northern U.S. and eastern and central Canada and isnt as strong as SYP. 7nX"a*C[3Dj8[n7;c}W6ynCK2AC?jP0zD'm)a7"tq~eikT):ozU*9Ry"EEy*x|r+Q/!P2GD[0iNvXv4HS-ljs2$r%M$-gi"H"3J2!&IjHnVo " 3Xi^!gc18,WxFWF2O0eMu ~e{lcoJxK]a|rJaxWFX1' g%|M'kL&^JgY9#%T;RnrIwdmdx:rNY%KDn1s,eD8WNjSgvb5OPYn0? .y Z,4zl,RrIl@%<6dWoLMf6Y6J6agH Recommended for uses where high strength, stiffness and good Too much. vX63t$i"CIdxGFG(bpX@F2@2@pGG1Z@? PDF Treated Span Chart - Culpeper Wood Preservers However, enough gets into the wood to provide a shell of protection that cant be matched with a brush. 3 and Stud 12" wide 2050 1900 1750 1350 1250 1150 1150 975 900 575 1100 1050 900 725 675 600 575 550 525 325 175 175 175 175 175 175 175 175 . This Old House general contractor Tom Silva usually buys stacks of No. #2 Prime grade has the strength of #2 grade lumber, but will look better, with fewer knots Premium Grade: Use when small knots are desired and appearance is very important. SPIB is subject to continual review by IAS to ensure that the laboratory and agency records remain in compliance. A quick depressurization cycle then removes any excess from the wood before it is removed from the treatment cylinder. Pressure-treated wood can dry in about 1 month, whereas fresh wood provides an environment where fungi and bacteria produce rot and insects infest. Kiln-dried wood vs pressure treated: what is better? Outside building projects and even some damp areas inside require wood that is resistant to moisture damage. The most noticeable difference may be the price and scarcity of #1 grade lumber. Lumber that is KD (kiln-dried) or S-DRY (surface-dry) has a moisture content that is lower, between 16% and 19%. Older growth wood is better but more expensive and difficult to find.

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