Being 80% or more clear of defects, it is often used for cabinetry, furniture, and trim. Each charge sheet is reviewed to verify that all IQC requirements have been met and properly documented. Has a better appearance than No.1 Dense Dimension Lumber because of additional restrictions on firm red heart, pith, knots and wane. Treated Wood | SPIB | Southern Pine Inspection Bureau Premier structural grades. Get the latest This Old House news, trusted tips, tricks, and DIY Smarts projects from our expertsstraight to your inbox. Construction grade commonly refers to #1 grade lumber. Grade Descriptions - Southern Pine Pressure-treated wood can dry in about 1 month, whereas fresh wood provides an environment where fungi and bacteria produce rot and insects infest. Pressure treated lumber commonly is end-tagged with an information label before leaving the plant. %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 So if you see HT on the stamp theres no real reason to doubt its treated but there is no way to know for sure on a brand new deck. s 2 lumber, which provides good strength at a reasonable price. Help a newbie identify treated wood? | LumberJocks Woodworking Forum 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. I do like to cover the tops of the joists and beams with ice and water shield. High quality with good appearance characteristics. it is damn difficult to tell the differance on the new stuff. CCA is a mixture of chromium, copper, and arsenic that turns wood green. It has a unique broad grain cellular structure that allows for uniform and deep penetration of chemical preservatives. The lumber has the structural strength it is graded with but has fewer blemishes or knots, so a better appearance. What is the Best Pressure Treated Wood for Decks? While all species are graded at the same four levels of strength and appearance, they are not equally strong. 2 lumber, which provides good strength at a reasonable price. Protecting wood against rot and insects has been done for centuries. Grademarks | SPIB | Southern Pine Inspection Bureau two existing joists with this stamp are not dark in color like i think pressure treated wood should be I used to live to work. Not all PT is rated for ground contact. As you look through our website, you will recognize the many different grades of lumber we stock. 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. 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. A high-pressure period is then undergone to push the preservative deep into the wood. In the 19th-century railway companies used creosote to coat railway ties and timbers for bridges. Largest hole permitted is 1/16". Ill suffer with pt. Exciting stuffyou wont want to miss that! This website is presented by SFPA members, including: 2023 Southern Forest Products Association. One wide face and both adjacent narrow faces must be free of pith and/or heartwood. This defect is exacerbated in the presence of Spi-1 haplo-insufficiency (Spi1+/- SpiB-/-). Pressure treated lumber has been infused with preservatives to prevent rot and insect damage. MC-15 identifies lumber as having 15% or less moisture content. It may have poor drainage and air circulation, or like a sill plate, is difficult to repair or maintain. Youll get less movement with kiln-dried (KD) or surface-dry (S-DRY) lumber, which has a moisture content between 16 and 19 percent. OK then thanks. Treated wood is made from strong evergreen species making it suitable for most building projects. A final vacuum removes the excess preservative from the woods surface before the charge is removed from the cylinder and placed on the drip pad. 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. This cryptic tattoo indicates that a piece of wood meets established standards for strength and stiffness, and it also offers useful information about the type of wood and how much moisture it contains. We work together with our subscribers to provide consistent, accurate inspection data for their use to improve product quality, meet Building Code specifications, enhance service life, and promote industry sustainability. Most is not. Hi Raymond, it looks like this 2 in. I did some research and found that they only staple the PT label to the end of the boards in many cases. 6^,fniSgdc24.L7` b. Fax: (850) 434-1290. The solution protects against insects, mold, mildew, fungus, and rot, and turns the wood a light brown hue. Pressure treatment is an affordable alternative to expensive naturally rot-resistant lumber. The American Wood Protection Association (AWPA) sets the standards for the retention level required for the different chemical preservative compositions for specific types of use. Allows well-spaced knots of any quality. Stud is a fifth designation, meaning its good for a load-bearing wall. Different chemicals have been used in the preservative bath, with changes being made to limit health risks to humans and animals. THIRD-PARTY AGENCY AUDIT and SAMPLING PROCEDURES. Sep 13, 2020 i would not use that for cutting boards,looks to be a soft wood and you want a hardwood like maple or cherry. As I understand it, the grade refers to the number of knots in a given length. Tel: 843-236-9399. No. Preservative Treatment When pressure-treated lumber is required, it should be treated according to appropriate American Wood Protection Association (AWPA) Standards or through the product evaluation process of the International Code Council (ICC) Evaluation Service. 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. r Construction grade is #1 and Standard is #2. Georgia-Pacific pressure treated lumber is an economical building material that offers all the benefits of wood, plus built-in resistance to decay and termite damage. It is stronger than #2 or #3 grade lumber. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Box 10915 Pensacola, Fl. Similar in appearance to No.1 Dimension Lumber. A quick depressurization cycle then removes any excess from the wood before it is removed from the treatment cylinder. SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. I hope you have a better understanding of what pressure treatment means and which grade and type is best for your project. #2 Prime/Appearance Grade (APG): A step up from #2 in appearance, this grade will have characteristics . It has anti fungal properties along with a host of other positive features. '\ & Ls30+X61j\e(gV]]M(q9qs)loyM However, it shouldnt be used where it comes in contact with food or animal feed. The grade of lumber is noted SS, #1, #2, #3, or STUD and the price reflects the quality. A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. PDF Treated Span Chart - Culpeper Wood Preservers It could be HT and then PTd later? Southern Pines ease of treatability has made it the preferred species when pressure treatment with wood preservatives is required. The wood then is dried naturally or in a kiln to evaporate the water out, leaving the preservatives behind. Office: (850) 434-2611 | Toll Free: (800) 995-7742 The main tree species used in the manufacture of pressure treated lumber are softwoods that regionally predominate in the mill area. Larger sizes conform to Dense Structural 72 Structural Lumber except for dense grain requirement. It holds nails, screws, and other fasteners well, and is commonly used in residential, industrial, and commercial construction. 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). So, weve covered a lot of ground, but this is not the end, not by a long shot! As the wood dries, the preservative is left behind to protect against insects, mold, mildew, fungal growth, and rot. Recommended for most general construction uses where moderately high design values are required. s It's distinctive wood grain appearance is great for decorative finishing. Pressure-Treated Pine meets the highest grading standards for strength and appearance. The Fora platform includes forum software by XenForo. However, treated lumber may be kiln-dried or wet and will shrink, cup, and warp as it dries. Some on this forum think that is a waste of time, but I think it extends the life of the lumber. Penetration is verified on-site by the third-party inspector before sending the assay zones to the agency laboratory for retention analysis. %\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+! Longleaf, shortleaf, loblolly, and slash are some of the native southeastern pines that are classified as SYP. Green Building Material . All rights reserved. Modern science has developed preservative treatments that are odorless and colorless, and leave the wood paintable and dry to the touch. Unfortunately, the water-soluble nature makes them susceptible to leaching out in rainy or wet areas, or near standing water. Structurally, an SPF #3 28 can be used to span distances of 12-4. IMO when buying PT for above ground use, quality and appearance is what counts. Behind the Mark: A Look at the SPIB Treated Wood Inspection Process How to Figure Out if Wood Has Been Pressure-Treated, and Why It Matters In appearance grade, the planks are 66% clear wood. 1s and Selects, to boot. 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. Tel: 251-457-6872. We've downsized and im already overimproved. %PDF-1.5 % Those stacks also include some No. Just to second what rjniles just said, the HD guy couldn't be more wrong (imagine that). The appearance doesnt affect the structural grade, it just is superficially more appealing. Select grade lumber may have a knothole every 4 and splits can not be longer than the board is wide. 7nX"a*C[3Dj8[n7;c}W6ynCK2AC?jP0zD'm)a7"tq~eikT):ozU*9Ry"EEy*x|r+Q/!P2GD[0iNvXv4HS-ljs2$r%M$-gi"H"3J2!&IjHnVo " 3Xi^!gc18,WxFWF2O0eMu ~e{lcoJxK]a|rJaxWFX1' g%|M'kL&^JgY9#%T;RnrIwdmdx:rNY%KDn1s,eD8WNjSgvb5OPYn0? .y Z,4zl,RrIl@%<6dWoLMf6Y6J6agH Utility grade is #3 grade lumber and has even fewer restrictions regarding knots and defects compared to other grades. No.1 Prime No.2 Prime H ighqu al ty, m ed nc r sfo . wo*kS` 8r 5f)J `A%pWIu `lt=K!a4'(Xg^dU|$a!/,.-`0ir }dF\Nguyi12(8+DU Zty ehV$W'A Advances in preservative treatments, environmental management and sustainable forestry practices make treated wood an ecologically sound building material. Listed spans are for wet-service conditions, pressure-treated Southern Pine floor/deck joists, MC > 19%. Regardless of whether the preservative system is approved through the AWPA or ICC-ES process, the inspection and analytical standards used to monitor the respective quality attributes are delineated in the AWPA Book of Standards. s He is passionately interested in home improvement, renovation and woodworking. May have to look at Home Depot closer, since they carry #1 above ground. Best appearance (compared to Standard) High-quality lumber Smaller and fewer knots Standard Grade: Use when a rustic appearance is desired. CCA is comprised of arsenic, chromium and copper. hbbd``b`i@i`}{" s@BHpE ^ !RHp@00 30 . endstream endobj startxref 0 %%EOF 162 0 obj <>stream Box 10915 Pensacola, Fl. Copyright 2022Culpeper Wood Preservers | All rights reserved. The clear appearance makes it a choice for trim, furniture, and cabinetry. In most cases, the required depth of penetration is 2.5 or 85% of the available sapwood. Southern Pine's ease of treatability has made it the preferred species when pressure treatment with wood preservatives is required. The grading is standardized and consistent for structural strength across the U.S. and Canada. Recommended for general construction uses. Within all grades, there are planks that will be freer of blemishes and knots and may be called premium. #2 Prime Southern Yellow Pine Above Ground Actual: 1.5-in x 5.5-in x 12-ft #2 Prime Southern Yellow Pine Above Ground Actual: 1.5-in x 5.5-in x 12-ft Treated for protection against fungal decay, rot and termites Treatment meets AWPA (American Wood Protection As r Some wood goes through a machine that incises small cuts into the surfaces for deeper chemical protection. Copyright 2023 This Old House Ventures, LLC. The treating process includes an initial vacuum to remove the excess moisture and air to aid in the absorption process. Lumber may have one hole every 3 and any splits must not be bigger than the plank is wide. Where applicable, the International Building Code requires that all treated wood products be treated and labeled as meeting specific AWPA Standards and bear the mark of an ALSC-accredited agency OR equivalent. 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. SYP Lumber Sales. 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. Good-quality sheathing, fencing, shelving and other general purpose uses. |fqqq~^;mffvf-5wV)64O?q30baveaj^-l*)+1$D>Vnm:OP0C#ddu1;r:8wwQKww3)IKLQ. SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. JavaScript is disabled. 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. Larger sizes conform to Dense Structural 65 Structural Lumber except for dense grain requirement. Green unseasoned lumber fresh from the mill is labeled either air-dried (AD) or surface-green (S-GRN). The stamp identifies the wood species, grade, moisture content, inspection organization, and the mill it came from. Dont know how PT Pine looks. t|]UE)@Whi`_@z>'}8/p}8c The size, location, and the number of knots and other defects, and the slope of the wood grain affect the structural strength of lumber. It is used for all areas of residential construction from load bearing to trim. Recommended for general construction uses. Resistance to biological decay is 15-25 times higher then of untreated wood There is no structural premium grade, it is strictly a term for bright looking wood free of blemishes or knots. H\n0l/$x\$-"-! Wood preservation also helps conserve forest resources for future generations by greatly reducing the amount of wood needed to replace untreated wood structures prematurely damaged by decay or termites. The HD guy is wrong. Douglas fir has a tight close grain cell structure making it stronger and less prone to warping and twisting than pine. {l@n7gM. 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. Suitable for economical use as sheathing or lathing. SPIB also inspects mills that manufacture and label various lumber products under these rules. check out this FAQ web site. 139 0 obj <> endobj 153 0 obj <>/Filter/FlateDecode/ID[]/Index[139 24]/Info 138 0 R/Length 80/Prev 801267/Root 140 0 R/Size 163/Type/XRef/W[1 2 1]>>stream #1 is better. Suitable for use as individual laminations for structural glued laminated timbers. 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. Appearance is same as C Finish for thicknesses of 4" and less and widths 12" and less. But using bigger joists of a cheaper species might save you money without loss of strength. However, they make an ideal solution for use in arid or dry locations. Number 2 grade lumber often has more knots and blemishes than #1 grade but may be clear enough on one face to be deemed select or premium. Walking into a lumberyard or store can be a daunting experience. SPIB performs these functions through the accreditation of the American Lumber Standard Committee (ALSC) as appointed by the Department of Commerce. Superior product suitable for a wide range of uses including shelving, boxing, crating, and form lumber. CCA is still used for industrial purposes today. 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 . Non-stress rated, but economical for general utility purposes such as bracing, blocking, bulkheading, etc. My 2-Story Addition Build in Progress Link . A walk down the lumber aisle or through a lumberyard will provide some understanding of the differences between #1 and #2 grade pressure treated lumber, or increase your confusion. Grade based on No.1 Dimension Lumber except wane and other characteristics that affect appearance are limited. materials that may be exported. Good appearance, but graded primarily for strength and serviceability. There are six different types of pressure treatment ratings, with different categories in some of them. Use UC3A pressure treated lumber for above ground exterior projects. She said that some of the new PT looks so much like untreated they have to add a color enhancer to it. Fax: (850) 434-1290. 1s and Selects, to boot. @_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 This specific set of data for each charge is called a charge report. Treated wood is made from strong evergreen species making it suitable for most building projects. Generally sound and tight-knotted. #1 will have less knots and is typically spec'd for joists and rafters. r Quality control for treating should be done by an approved inspection agency. 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. An easy way to identify the right framing lumber for your needs. Commonly used for joists, trusses, and other load-bearing applications. Establishes lumber quality based on a graders visual inspection. The preservatives provide protection against rot, insects, mold, and fungi, so the wood lasts longer. See Table 2 or SPIB Grading Rules for design values. The molecular changes in wood composition have a result of dimensional stabilization, protection against rot and wither, and as a result, expanded use opportunities. The wood is commonly used for light construction or framing where it isnt visible, or for bracing, packaging, and shipping purposes. KD HT lumber vs PT lumber for deck - InterNACHI Forum The grade-mark must contain the first four items listed below; the fifth item is optional. maple, oak, birch, etc. I grabbed an exerpt here and there and put it all together, for I was on a lot of different sites and suppliers. Well-manufactured material evaluated by calibrated mechanical grading equipment which measures certain properties and sorts the lumber into various strength classifications. 43:Gs * endstream endobj 143 0 obj <>stream MSR lumber is distinguished from visually stress graded lumber in that each piece is non-destructively tested. The amount of chemical retained determines how resistant the lumber will be. 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 table below identifies the main differences. Premium is usually #1 or #2 grade lumber. Machine Stress Rated (MSR) lumber is evaluated by mechanical stress rating equipment. Im building a deck and am getting conflicting info on the difference between #1 and #2 PT. Pressure Treated Lumber Grades, Types, and Uses Explained Then I worked to live. Dimensional wood from all grades is pressure treated for different uses. Pressure treated wood has many outdoor uses and even is used in some indoor locations, especially where moisture may be a concern. Both can be used for load-bearing purposes or other outdoor applications. The lumber is stronger than #1 or #2 and is ideal for all structural construction applications. Review this helpful illustration showing the proper application of pressure-treated Southern Pine materials for a variety of projects around the home. This information will then be combined with previous plant data to determine the plant performance status, as mentioned above. r Pressure treated lumber is divided into different types based on the retention level or amount of preservative retained in the wood after treatment. 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. 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. Timber Grades have similar characteristics to the corresponding grades of dimension lumber. No.1 Drop Siding is graded as No.1 Boards; No.1 Flooring and Paneling not provided under SPIB Grading Rules as a separate grade, but if specified, will be designated and graded as D. Graded as No.2 Boards. For appearance, it must be 29% clear of defects. This approach is intended to consider the big picture trends as opposed to allowing otherwise isolated issues to severely affect plant performance status. hVmO9 ^TUJk[ Appearance is same as D Finish for thicknesses 4" and less and widths 12" and less. Lumber with more checks, splits, wane, well-spaced larger knots and holes, and a grain slope of 1 in 4 are stamped #3 or construction grade. Helping You to Do It Yourself! It was widely used as a preservative from the mid-1930s to 2004. Lumber must be stamped for strength by a trained inspector and identified with a legitimate stamp. spib no. It has nothing to do with the wood being pressure treated (PT) at all. Eugene has been a DIY enthusiast for most of his life and loves being creative while inspiring creativity in others. Some types of timber have natural abilities while others need a boost. All structural lumber used in the U.S. and Canada requires a stamp identifying it as grade SS, #1, #2, or #3. To qualify for a SPIB grade-marking license, a mill must have verified credentials in the manufacturing, seasoning, and grading of Southern Pine lumber. Pressure treated lumber comes in a variety of lengths, widths, and thicknesses and from different species of softwood. endstream endobj 146 0 obj <>/Filter/FlateDecode/Height 49/Intent/RelativeColorimetric/Length 6519/Metadata 150 0 R/Name/X/Subtype/Image/Type/XObject/Width 174>>stream &_ePM&dWCh Follow the link here to complete our Treated Division and Laboratory Customer Satisfaction Survey. 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). SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. It should be noted, #2 & BTR does not mean #1. Mobile, AL. At the end of the pressurized period, the solution is pumped out and stored for use on the next batch. This double treated Ground Contact lumber must be used for applications where treated lumber is difficult to maintain, repair or replace.