*Load duration factors greater than 1.6 shall not apply to structural members pressure-treated with water-borne . To qualify for a SPIB grade-marking license, a mill must have verified credentials in the manufacturing, seasoning, and grading of Southern Pine lumber. The preservatives dont affect the load-bearing abilities, just provide protection against insect, mold, mildew, and rot damage. For appearance, it must be 29% clear of defects. No 4x or 6x stuff that you might use for skids. 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. Treating cylinders vary in size and length and a single charge of lumber can contain anywhere from 8,000 to 25,000 board feet of lumber. http://www.anthonyforest.com/pdfs/AWPA-Use-Category-System-U1-07.pdf. Commonly used for joists, trusses, and other load-bearing applications. Any lumber experts out there that can confirm KD HT is ok for a new deck? 2 lumber, which provides good strength at a reasonable price. The wood grain has a 1 in 8 slope, and there may be bark edge or wane visible. {l@n7gM. x 12 in. Lumber that is imported or for export requires the designation KD-HT, which means it has been kiln-dried and heat-treated to kill insects. May 26, 2016. Termawood is an unique technology that uses heat treatment for timber processing to significantly improve various characteristics of wood. All rights reserved. The lumber is stronger than #1 or #2 and is ideal for all structural construction applications. The wood should be at least 6-inches above the ground, have good air circulation and drainage, and the components can easily be replaced. I do like to cover the tops of the joists and beams with ice and water shield. Research shows that Southern Pine can be expected to last for many decades when properly treated and installed for its intended use. Pressure treated lumber commonly is end-tagged with an information label before leaving the plant. D Fir-L or Doug Fir for Douglas fir or larch (L), H-F, Hem-fir, or Hem for hemlock-fir or hemlock. Similar in appearance to No.2 Dimension 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. Once penetration is verified, the outer section of the cores is removed to measure the amount of preservative retained. Dense Select Structural Select Structural. Select grade lumber may have a knothole every 4 and splits can not be longer than the board is wide. PDF Strength Treatability Beauty - Teague Lumber For additional information on the proper handling and storage of pressure-treated Southern Pine materials,click here. Construction grade is #1 and Standard is #2. };hax{Hk[qMkhpcge/*b7_W?!r*uEkGhKZS$_~Zuzrxx xo)>kf}sgn^k4$=!i[*5X,y-ZrZ1 I% I?S?C# M7nsp:{&|nn1###M&d lB6-M&d lB6M&d ; IS)VY23xe@YY_Q_Y_Q_Y_Q_Y_Q_Y_Q_u_BNt/;(.? H\Ak0:b @HZ=8&5FqjfvRut.I/55zb6+]5m&.wgUWm,ZM]nrO=gu${Tu?co2:4 Lumber Grade Stamps - InterNACHI - International Association of Excellent for painting or natural finish where requirements are less exacting. It's easy to work with. The stamp identifies the wood species, grade, moisture content, inspection organization, and the mill it came from. May have to look at Home Depot closer, since they carry #1 above ground. Grade based on No.1 Dimension Lumber except wane and other characteristics that affect appearance are limited. H|TnT1}W1yi= hEN4Kg8 bvlbh%gCXcX]NDRnFiUH>.Sl6Vi\(f^j+d}IT#h3Si [j6sG1Pbh`sX9W.+|FdqvJY/nm Sd@{D hVmO9 ^TUJk[ Similar to MCA, the treated wood shouldnt be used in contact with food or animal feed. Pressure Treated Lumber Grades, Types, and Uses Explained 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. A joist made of Douglas fir, for instance, will cover a greater span than a hemlock joist of the same size and grade. 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. Those stacks also include some No. #1 is better. Eugene has been a DIY enthusiast for most of his life and loves being creative while inspiring creativity in others. Pressure treated wood has many outdoor uses and even is used in some indoor locations, especially where moisture may be a concern. t|]UE)@Whi`_@z>'}8/p}8c I am finding lots of info about how HT (heat treated lumber) is required for packaging, pallets etc to prevent the spread of some WDO across the world but can not find anything concrete on whether or not it is suitable for a deck. High quality, limited in characteristics that affect strength or stiffness. It often links with the logo or symbol of the association that oversees the grading at that mill. He is passionately interested in home improvement, renovation and woodworking. Application of the product requires pressure treatment by an approved treating process and preservative for marine usage. Most is not. Pressure treated lumber is available in 1, 5/4, 2, 4, and 6 nominal thicknesses, and widths up to 12. Dimension stability improves 12-17 times compared to untreated wood Powered by Discourse, best viewed with JavaScript enabled, www.strongtie.com/products/ptwoodfaqs.html, http://www.anthonyforest.com/pdfs/AWPA-Use-Category-System-U1-07.pdf. Structurally, an SPF #2 28 can be used to span distances of 14-11. Ultimately, our program provides an economically sound and standardized method of treatment, evaluation, labeling and certification for producers, specifiers and end users of pressure treated wood products. Oil-based and creosote treatments are still used but since the preservatives leach out over time and with heat, they are considered too messy or hazardous for residential use. Pro Note: All copper-based wood preservative solutions will corrode unprotected iron and steel brackets and fasteners. Specification Guidelines - Southern Pine s H\n0l/$x\$-"-! There are many other uses for pt lumber, including docks, boathouses, sheds, boardwalks, play structures, gazebos, and the list goes on. 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. Recommended for general framing purposes. Pressure treated wood may require several weeks or even months to dry before it will absorb stain or paint. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. It was widely used as a preservative from the mid-1930s to 2004. The SPIB Treated Wood Quality Audit Program provides a customized third-party quality control program to help Treated Wood producers meet industry-approved standards. Pressure treated lumber comes in a variety of lengths, widths, and thicknesses and from different species of softwood. Green Building Material . As you look through our website, you will recognize the many different grades of lumber we stock. The wood is 43% clear for appearance grading. Final Price $ 27 40. each. Older growth wood is better but more expensive and difficult to find. The grading is standardized and consistent for structural strength across the U.S. and Canada. Standards Revised The 2016 Book of Standards published by the American Wood Protection Association(AWPA) includes revisions to treated wood standards: Ground Contact-treated wood is now required when installed less than 6 off the ground; when it is wetted on a frequent and recurring basis; for joists and beams that are difficult to maintain, repair or replace and are critical to the performance and safety of the structure; when used in tropical climates. MC-15 identifies lumber as having 15% or less moisture content. When pressure treated it is resistant to decay and termites. Charges found non-conforming, either through plant IQC or third-party, are isolated for correction and the corrective actions are to be documented accordingly. Lumber Products | Southern Pine Lumber Company See Finish grades for face side; reverse side wane limitations are lower. AC2 2 x 6 #2 Prime Ground Contact Tongue and Groove Treated - Menards Grademarks. The preservatives provide protection against rot, insects, mold, and fungi, so the wood lasts longer. SPIB is accredited through IAS and maintains ISO certification as both an inspection agency (ISO 17020) and a Laboratory (ISO 17025). Both #2 grades have all the characteristics, including knot size, of regular #2 grades but are selected for 4 square edges (very light to no-wane or bark). A study by the EPA in 2000 deemed it too hazardous for residential use, and in 2003 the lumber industry agreed to stop using it for residential purposes. Good appearance, but graded primarily for strength and serviceability. %PZqI]Hx(or3'Z1Ld8&.u$eIJ{\,a(1I4;^?dB;|+abd` wX{M\f/=#S8NS6~#|oNQ5 Lj|< W-&A^N'*6|t79Ir8:]3Y -Q/A9h.BBvX >A3s*E3_2pS\5a 2 grade lumber, commonly referred to as "#2 & Btr" is used where high design values are required and high appearance in not a factor. Before a given charge can actually go into the plants treated inventory to be ready for shipment, it must first be evaluated for penetration. The lumber may have splits up to 1.5 times the boards width, knots no larger than 3-1/2, and one hole every 2. Southern Pines ease of treatability has made it the preferred species when pressure treatment with wood preservatives is required. Suitable for stud uses including use in load-bearing walls. End-glued, face-glued, and edge-glued Southern Pine in glued assemblies, including stress-rated grades of finger-jointed 2" Dimension Lumber. WestWood Heat Treated Lumber Production Corporation is unique technology that uses heat treatment instead of chemicals for timber processing to significantly improve various characteristics of 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. Pressure treated wood can also be stained or sealed to enhance its color and for added protection. (KD-HT means the wood was also heat treated to kill pests, a requirement for imported lumber.) The HD guy is wrong. High utility value where appearance is. Good, serviceable sheathing; usable for many economical applications without waste. Myrtle Beach, SC. Im building a deck and am getting conflicting info on the difference between #1 and #2 PT. Premium is usually #1 or #2 grade lumber. Behind the Mark: A Look at the SPIB Treated Wood Inspection Process SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. If the wood is #1, it is stamped #1. Standard grade lumber has more defects and knots and is #2 structural grade wood. I did find a post about how the PT label might be cut off the end of a board and the stamp that is left shows HT or kiln dried HT. CCA Pressure-Treated Wood Wood-constructed homes, roof shakes and shingles, exterior decks, and children's play equipment that were built before 2004 and not made of cedar or redwood were likely constructed using wood that was pressure-treated with CCA, or chromated copper arsenate. At the end of the pressurized period, the solution is pumped out and stored for use on the next batch. check out this FAQ web site. The preservatives provide protection against rot, insects, mold, and fungi, so the wood lasts longer. These Standards are very prescriptive in the requirements for Quality Control procedures, preservative penetration, analysis methods for retention, in-plant equipment, records and third-party agency responsibilities and requirements. r The wood weathers better than untreated wood and wont gray or discolor as quickly. Tell us how were doing! The SPIB grade-mark is recognized as a sign of integrity within the industry. See SPIB Special Product Rules for design values, Appearance is same as B&B Finish for thicknesses of 4" and less. Most lumber in my area is listed as Prime or Premium depending on the box store and is stamped #2 or #2 & BTR. 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. Longleaf, shortleaf, loblolly, and slash are some of the native southeastern pines that are classified as SYP. The molecular changes in wood composition have a result of dimensional stabilization, protection against rot and wither, and as a result, expanded use opportunities. Design values only apply to utility lumber that is 4 wide. Usable lengths suitable for bracing, blocking, bulkheading and other general utility purposes where strength and appearance are not a consideration. However, it shouldnt be used where it comes in contact with food or animal feed. Our next Blog will take the samples to the SPIB laboratory for analysis to determine if retention values are conforming. THIRD-PARTY AGENCY AUDIT and SAMPLING PROCEDURES. Each charge is tallied as to the specific Production Category that will be used to determine the level of sampling to be performed in the plants treated wood inventory. The main difference between #1 and #2 is the slope of the wood grain, size, spacing, and the number of knots and holes, and the length of any splits. 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. SPIB performs these functions through the accreditation of the American Lumber Standard Committee (ALSC) as appointed by the Department of Commerce. Within all grades, there are planks that will be freer of blemishes and knots and may be called premium. Some types of timber have natural abilities while others need a boost. Locations Products. The clear appearance makes it a choice for trim, furniture, and cabinetry. The International Code Council Evaluation Service (ICC-ES) similarly approves preservative systems through its Evaluation Service Reports (ESRs). Recommended for uses where high strength, stiffness and good The solution protects against insects, mold, mildew, fungus, and rot, and turns the wood a light brown hue. Douglas fir, fir, and hemlock dominate in the western U.S. and Canada, with Douglas fir ranking the strongest of the commonly milled and treated softwoods, while the fir and hemlock are slightly stronger than SPF. Appearance is same as D Finish for thicknesses 4" and less and widths 12" and less. While most residential pressure treated lumber is deemed safe for use, dust and particles can still be harmful. Kiln-dried wood is lighter, easier to work with, and less likely to split. The very basic quality control attributes to evaluate the level of treatment in lumber products is the determination of the depth of preservative penetration and the analysis of preservative retention in a specified, outer assay zone. Used for such purposes as studding, blocking, plates, bracing and rafters. These values are modified using procedures shown in "Calculating Apparent Reliability of Wood Scaffold Planks," as published by the Journal on Structural Safety, 2 (1984) 47-57, and updated in 1993. It is used for all areas of residential construction from load bearing to trim. Ok, now that weve got that covered, lets go to the treating plant! As I understand it, the grade refers to the number of knots in a given length. To qualify for a SPIB grade-marking license, a mill must have verified credentials in the manufacturing, seasoning, and grading of Southern Pine lumber. hbbd``b`i@i`}{" s@BHpE ^ !RHp@00 30 . endstream endobj startxref 0 %%EOF 162 0 obj <>stream This website is presented by SFPA members, including: 2023 Southern Forest Products Association. 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. Once on the drip pad, the material will stay until it is dry enough to be moved into the plants treated inventory. 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. 6^,fniSgdc24.L7` b. Application of the product requires pressure treatment by an approved treating process and preservative for. 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. Plant inspections are required to be performed at least once per month, but may be increased due to production and/or performance. r #2: When appearance is of moderate concern, this grade will contain moderate size knots and can have a considerable amount of wane. Generally clear, although a. Recommended for general construction uses. Many DIYers and even some professionals arent familiar with the different types of pressure treated wood and their uses, or that the information is on the end-tag stapled to the board. vX63t$i"CIdxGFG(bpX@F2@2@pGG1Z@? %PDF-1.5 % Premium is often identified as A, B, C, and D. A has no visible defects, knots, or splits, B has a few small defects visible, C may have small knots on one side and none on the other, and D may have pin size (up to 1/2) knots or small defects on both sides. It has nothing to do with the wood being pressure treated (PT) at all. Larger sizes conform to Dense Structural 65 Structural Lumber except for dense grain requirement. It is a very strong and stiff softwood, and dense too. Severe Weather 2-in x 6-in x 12-ft #2 Prime Wood Pressure Treated Lumber Pressure treated lumber has been treated with a chemical solution to protect it from insects, mold, mildew, and rot. The grade of lumber is noted SS, #1, #2, #3, or STUD and the price reflects the quality. Abbreviations for framing-grade softwoods, from strongest to weakest, Doug Fir, D Fir- L: Douglas fir (L=western larch). The look of the wood is only important if it is highly visible, such as deck boards, railings, and other visible structural members. Selecting the correct type of treated wood for a project often depends on how and where it will be used. It is most commonly used for sheathing and applications where a fine finish is not required. Twenty cores are taken randomly throughout the charge to measure the depth of preservative penetration in each core. In most cases, the required depth of penetration is 2.5 or 85% of the available sapwood. All rights reserved. 2 Dimension Lumber characteristics. All structural lumber used in the U.S. and Canada requires a stamp identifying it as grade SS, #1, #2, or #3. It's distinctive wood grain appearance is great for decorative finishing. Structurally, an SPF #1 28 can be used to span distances of 14-11. We've downsized and im already overimproved. 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. Dressed to standard dry size prior to machine stress rating, and visually graded to assure that characteristics affecting strength are no more serious than the limiting characteristics for each grade. There are many questions about the different treated wood products in our market today. SYP Lumber Sales. Just to second what rjniles just said, the HD guy couldn't be more wrong (imagine that). There is a barcode with product information, registration logo or symbol noting the standards followed, and the use category (UC4A for Ground Contact). @_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 Advances in preservative treatments, environmental management and sustainable forestry practices make treated wood an ecologically sound building material. It has anti fungal properties along with a host of other positive features. It is stamped S-GRN for surface-green or AD for air-dried. Lumber Grades - ProWood lumber For outdoor seating. No.1 Prime No.2 Prime Size inches ( actu l) Spacing inches on center 12.0 16.0 24.0 12.0 16.0 24.0 12.0 24.0 16.0 24.0 TREATED FLOOR /D . It's usually stapled to the wood and isn't a requirement to be on the actual stamp. However, treated lumber may be kiln-dried or wet and will shrink, cup, and warp as it dries. The best pressure treated wood for decks is Select, #1 or #2 grade wood. 2 x 6 x 16' Prime Pressure Treated #2 Lumber *BUY IN BULK* AND SAVE A specific indicator or a specific method is then used to reveal the depth and consistency of preservative penetration. Helping You to Do It Yourself! Lumber may have one hole every 3 and any splits must not be bigger than the plank is wide. Youll get less movement with kiln-dried (KD) or surface-dry (S-DRY) lumber, which has a moisture content between 16 and 19 percent. Home Derpo person said that #2 is ground contact and stronger. Modern science has developed preservative treatments that are odorless and colorless, and leave the wood paintable and dry to the touch. HD and Lowe's only had lower grade. (@ 2=h/jO,,5rB G 5~7 ol}E|Cf6zg/I !^ endstream endobj 144 0 obj <>stream Recommended for uses where high strength, stiffness and good appearance are desired. Different chemicals have been used in the preservative bath, with changes being made to limit health risks to humans and animals. x 8 ft. #2 Prime or Better Ground Contact Pressure-Treated Lumber is a . Pressure treatment doesnt make the wood stronger or weaker, just more resistant to insect and moisture damage. 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 is crackproof but pressure-treated wood is not guaranteed against warping, shrinkage, or splitting. The treating process includes an initial vacuum to remove the excess moisture and air to aid in the absorption process. %\dbZ!1T09 F.#3s3+VdIr9f>LQOL7-1K)s+}OY'\awt_D FfhWnK8R5 @^L;@e\;7&8/O_PL;V@SqqZEy?9S=Z_{uh@fx:DSs=8! b+! The longer the wood is in the pressure chamber, the greater the content of chemical preservatives forced into and retained in the wood. Machine Stress Rated (MSR) lumber is evaluated by mechanical stress rating equipment. Outside building projects and even some damp areas inside require wood that is resistant to moisture damage. Stud is a fifth designation, meaning its good for a load-bearing wall. Recommended for general construction purposes where appearance is not a controlling factor. SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. The lumber is commonly used for all facets of structural construction, plus furniture, shelving, decking, railings, siding, post, and other purposes where its visible appeal can be appreciated. Those stacks also include some No. Recommended where high strength, stiffness and good appearance are desired. Wood Packaging Material (WPM). S;t HmM~[3`~Dl1Cj^x{}g.-GWlEu Yl[k4!42#>#13"J! 1pJ`w&Im0m/=BA!^/[xN XX=xEzGjB It has a unique broad grain cellular structure that allows for uniform and deep penetration of chemical preservatives. Treating plants that produce material under a given ESR are required to be monitored by third-party agencies approved by the International Accreditation Service (IAS). In appearance, it is at least 57% clear of defects. r But using bigger joists of a cheaper species might save you money without loss of strength. Although there may appear to be many differences in what options to use for your next project, there may be more similarities than you know. How to Figure Out if Wood Has Been Pressure-Treated, and Why It Matters Borates are sodium salts used in water-based pressure treatment solutions. 1, No. No.2 Non-Dense No. Review this helpful illustration showing the proper application of pressure-treated Southern Pine materials for a variety of projects around the home. #1 #2 prime etc deals with the quality of the board. Too much. The ALSC also accredits third-party agencies, like SPIB, to inspect treating plants that produce treated lumber products with preservative systems listed in the American Wood Protection Association (AWPA) Book of Standards (BOS). Lumber stamped #2 grade is commonly used for framing, lintels, rafters, trusses, joists, beams, and fencing. Application of these grade-marks represents assurance by the manufacturer that their Southern Pine lumber product is properly manufactured and meets the grade requirements of their customers, ensuring consumer confidence in Southern Pine lumber products. The label will show w/CE which means with color enhancement. Decking materials such as 26 and 5/46 frequently are of better-looking #1 and #2 lumber. SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. 1s and Selects, to boot. Water-repelling at a molecular level Follow along as we decode the stamp and show you how to get the most lumber for your money. Pressurization then forces the liquid deep into the wood. . Grades of Lumber - Culpeper Wood Preservers Recommended where appearance and strength are a consideration. The chamber is then flooded with a diluted chemical solution, and hydraulic pressure applied for 20 to 60 minutes to force the solution deeper into the wood. The SPIB publishes grading rules under which 95% of the production of the entire industry is classified and sold and maintains an extensive training program in a classroom setting, on the web, and at the mills. The charge is considered conforming if each component meets the minimum required retention AND the total, combined minimum retention is met. Prime Dimension: 2" to 4" thick, 2" to 12" wide; See Table 1 for design values: Grade: Grade Characteristics and Typical Uses: No.1 Prime: Recommended where appearance and strength are a consideration. An economical roof decking which conforms to No. it is damn difficult to tell the differance on the new stuff. This service is intended to assist mills in supplying products that meet the standards for wood packaging Grade based on No.2 Dimension Lumber except wane and other characteristics that affect appearance are limited. |fqqq~^;mffvf-5wV)64O?q30baveaj^-l*)+1$D>Vnm:OP0C#ddu1;r:8wwQKww3)IKLQ.
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