"Stud" is a fifth designation, meaning it's good for a load-bearing wall. Use tar paper or bituminous tape to protect metal brackets and ho-dipped galvanized or stainless-steel fasteners, or those specially coated to prevent corrosion by wood preservative chemicals. Raised floor homes look great and protect homeowners against risks from flooding and subsiding soils. Most likely it is a treated board, since most treated lumber is sold wet, some yards sell K.D.A.T. Suitable for economical use as sheathing or lathing. It has a unique broad grain cellular structure that allows for uniform and deep penetration of chemical preservatives. Lumber, posts, and ties range from 8 to 16 in length, although longer may be ordered. #1 will have less knots and is typically spec'd for joists and rafters. 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. Well-manufactured material evaluated by calibrated mechanical grading equipment which measures certain properties and sorts the lumber into various strength classifications. A high-pressure period is then undergone to push the preservative deep into the wood. 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. The lumber has the structural strength it is graded with but has fewer blemishes or knots, so a better appearance. CCA is still used for industrial purposes today. Copyright 2022Culpeper Wood Preservers | All rights reserved. S;t HmM~[3`~Dl1Cj^x{}g.-GWlEu Yl[k4!42#>#13"J! 1pJ`w&Im0m/=BA!^/[xN XX=xEzGjB Those and other treatments are used for industrial purposes instead. The greater the content of preservatives denotes the type and use of the treated wood. Now I must drink to work. s 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). Another brand of heat treated wood that can be used for decking. 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. 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. 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. #1 is better. The sampling procedures are the same as required by IQC, but re-inspection of a given charge will likely involve only a portion of the total charge. Overly dry wood often needs a pilot hole before fastening to prevent splitting. The look of the wood is only important if it is highly visible, such as deck boards, railings, and other visible structural members. Treatment with preservatives protects wood that is exposed to the elements, in contact with the ground or subjected to high humidity. To qualify for a SPIB grade-marking license, a mill must have verified credentials in the manufacturing, seasoning, and grading of Southern Pine lumber. Re-inspection of plant production is performed on a routine frequency by the agency. 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. #1 #2 prime etc deals with the quality of the board. Select Structural (SS) is the highest grade based on strength and durability. The plant is required to keep very specific information for each charge treated in its records system. Then I worked to drink. The SPIB Treated Wood Quality Audit Program provides a customized third-party quality control program to help Treated Wood producers meet industry-approved standards. 2 x 6 x 16' Prime Pressure Treated #2 Lumber *BUY IN BULK* AND SAVE I don't think HD carries it. H|TnT1}W1yi= hEN4Kg8 bvlbh%gCXcX]NDRnFiUH>.Sl6Vi\(f^j+d}IT#h3Si [j6sG1Pbh`sX9W.+|FdqvJY/nm Sd@{D Dimension stability improves 12-17 times compared to untreated wood Both DIYers and building professionals will like these garden and outdoor living ideas and plans. It can be used to span greater distances, an SPF SS 28 will reach 15-3. Lumber that is 2 or less in thickness (24, 26, 5/4 decking, etc.) The charge is considered conforming if each component meets the minimum required retention AND the total, combined minimum retention is met. So, weve covered a lot of ground, but this is not the end, not by a long shot! Application of the product requires pressure treatment by an approved treating process and preservative for marine usage. It is the material of choice with both professionals and do-it-yourselfers for projects exposed to the rigors of weather, hot, humid climates, decay, and termites. This lumber has been non-destructively evaluated by an American Lumber Standard Committee approved machine. Those stacks also include some No. spib no. This process is required through the plants Internal Quality Control (IQC) for all treated lumber products to be represented as meeting an applicable standard. 2 lumber, which provides good strength at a reasonable price. It's easy to work with. The type and dimension influence the strength of the timber. Some wood goes through a machine that incises small cuts into the surfaces for deeper chemical protection. Construction grade is #1 and Standard is #2. Modern chemical baths and pressurization began in the early half of the 20th century. 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 . The result of having a unified rating means the end-tag on lumber identifies how well the wood will stand up in different conditions, regardless of the chemical cocktail its been exposed to. s r May 26, 2016. I did some research and found that they only staple the PT label to the end of the boards in many cases. The kd19 is the customers assurance that it was dried to the proper level before it left the plant. 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. Construction grade commonly refers to #1 grade lumber. However, it shouldnt be used where it comes in contact with food or animal feed. Check sources of supply for available grades and sizes. The quest for decent boards begins. Reasonably clear, but permits limited number of surface checks and small tight knots. All rights reserved. It is used to build exterior stairs, for posts, sheathing, siding, porches, decking, and railings too. My electrical answers are based on 2017 NEC, you may have local amendments. The grades are stamped prior to the wood being treated, so are the same for both treated and untreated. All rights reserved. High quality, limited in characteristics that affect strength or stiffness. Pressure treated lumber commonly is end-tagged with an information label before leaving the plant. The kinds of softwood available in different geographic regions often determine what species is available for pressure treatment. (KD-HT means the wood was also heat treated to kill pests, a requirement for imported lumber.) ACQ is another environmentally safe preservative composed of soluble copper and either quaternary ammonium alkyl or substitute compounds. A number that identifies the mill where the lumber was produced. Economical, serviceable grade for natural or painted finish. A superior decking grade, suitable for plank floor where face serves as finish floor. Typically, the first step of a third-party agency audit involves a review of the plants records. 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. The clear appearance makes it a choice for trim, furniture, and cabinetry. Best appearance (compared to Standard) High-quality lumber Smaller and fewer knots Standard Grade: Use when a rustic appearance is desired. The longer the wood is in the pressure chamber, the greater the content of chemical preservatives forced into and retained in the wood. r Has a better appearance than No.1 Dense Dimension Lumber because of additional restrictions on firm red heart, pith, knots and wane. 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. The amount of moisture in the wood at the time of milling is noted. The ranking goes from Select Structural (highest strength, best appearance) to No. Protecting wood against rot and insects has been done for centuries. Inspection Practices for Treated Lumber Products. 6^,fniSgdc24.L7` b. The preservatives provide protection against rot, insects, mold, and fungi, so the wood lasts longer. MC-15 identifies lumber as having 15% or less moisture content. Outside building projects and even some damp areas inside require wood that is resistant to moisture damage. In appearance, it is at least 57% clear of defects. The solution protects the wood from rot, insects, fungus, mold, and mildew, and also turns the wood a brown tone. AC2 2 x 6 #2 Prime Ground Contact Tongue and Groove Treated - Menards Treated Wood | SPIB | Southern Pine Inspection Bureau it would be unsuitable unless it is a naturally resistant wood such as teak or redwood. The two remaining designations, while not very useful to a homeowner, enable grading agencies to enforce their standards. Provides good appearance with some of, Maximum recommended support spacing is 24" on center (16" on center for Imported Southern Pine), High-quality product, recommended where smallest knots are, Slightly less restrictive than premium grade. There is no structural premium grade, it is strictly a term for bright looking wood free of blemishes or knots. Selecting the correct type of treated wood for a project often depends on how and where it will be used. &_ePM&dWCh Utility grade is #3 grade lumber and has even fewer restrictions regarding knots and defects compared to other grades. For appearance, it must be 29% clear of defects. Plant inspections are required to be performed at least once per month, but may be increased due to production and/or performance. Got your hard hat and high-vis vest? PDF Pressure-treated Southern Yellow Pine This defect is exacerbated in the presence of Spi-1 haplo-insufficiency (Spi1+/- SpiB-/-). 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. I'm redoing my deck surface and the lumber yard stocks only prime lumber. PDF AC2 Pressure Treated 8:16 - Midwest Manufacturing This information will then be combined with previous plant data to determine the plant performance status, as mentioned above. MSR Scaffold Plank is available 2"-thick only. Pressure treated wood for ground contact commonly has twice the chemical retention level as above ground rated lumber. #2 Prime Grade has a maximum hole size of ". 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 Composite of No.3 strength and No.1 nailing edge characteristics for a better nailing surface. This specific set of data for each charge is called a charge report. 3 (lowest strength, not pretty). Treated wood is made from strong evergreen species making it suitable for most building projects. Pressure treatment of lumber has come a long way in the past 100 years. I have to call this lady back again at COX lumber, I had called her about something else and she was very knowledgable. In this article, well explain pressure treated (pt) lumber, the different types and uses, and how it is graded. The treated wood is then taken to the yard to dry naturally or to the drying kilns before shipping to the retailer. No. PDF Reference Design Values for Visually Graded Southern Pine Dimension 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 %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 Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Dense Select Structural Select Structural. Pressure treated lumber comes in a variety of lengths, widths, and thicknesses and from different species of softwood. 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. Eugene has been a DIY enthusiast for most of his life and loves being creative while inspiring creativity in others. Basements and bathrooms are other areas where pressure treated wood can be used to frame interior walls to protect against moisture, mildew, and mold damage. Georgia-Pacific Corporation Pressure Treated Lumber - GlobalSpec Longleaf, shortleaf, loblolly, and slash are some of the native southeastern pines that are classified as SYP. outdoor deck question. heat treated vs pressure treated wood 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. It is stronger than #2 or #3 grade lumber. The type identifies the amount of chemical retention which in turn determines how or where to best use the lumber. Lumber may have one hole every 3 and any splits must not be bigger than the plank is wide. 2 in. x 12 in. x 8 ft. #2 Prime or Better Ground Contact Pressure Good appearance, but graded primarily for strength and serviceability. Wood Packaging Material (WPM). This website is presented by SFPA members, including: 2023 Southern Forest Products Association. #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. 2, and No. @_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 She said that some of the new PT looks so much like untreated they have to add a color enhancer to it. Generally, the charge is accepted if at least 80% of the cores (16 of 20) meet the minimum depth of penetration. Charges found non-conforming, either through plant IQC or third-party, are isolated for correction and the corrective actions are to be documented accordingly. 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. 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. Pressure-treated wood can dry in about 1 month, whereas fresh wood provides an environment where fungi and bacteria produce rot and insects infest. See Finish grades for face side; reverse side wane limitations are lower. Grade based on No.1 Dimension Lumber except wane and other characteristics that affect appearance are limited. Generally sound and tight-knotted. More knots than Premium grade Allows well-spaced knots of any quality. Recommended for most general construction uses where moderately high design values are required. Recommended where appearance and strength are a consideration. One even identifies its pressure treated pine fence boards as D & better so its appearance has small pin knots and some other blemishes. The molecular changes in wood composition result in unique features: Pressure treated wood used for in-ground or critical use has a greater retention level than timber used for above or ground contact. Pressure treated to a Ground Contact retention of either ACQ or CA Chemical preservative. The amount of chemical retained determines how resistant the lumber will be. 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. {Vzgil=ecQ*Q\o[lb[9X^gZyzzxzxxxyO`}@}(% m6@93 gx$?yV7`{x"?W@_} s 43:Gs * endstream endobj 143 0 obj <>stream Most is not. Different chemical solutions are used to create treated lumber. Home Derpo person said that #2 is ground contact and stronger. Even if you are on the right track, you will still get run over if you just sit there. I only use ground contact when the wood is actually touching the ground. Tyrosine phosphorylation and calcium mobilization induced by BCR engagement is diminished in Spi1+/- SpiB-/- B lymphocytes, although many key BCR signaling proteins are expressed, suggesting that Spi-1 and Spi-B regulate expression of additional . Fax: (850) 434-1290. You Save $3.39 with Mail-In Rebate. 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. KD HT lumber vs PT lumber for deck - InterNACHI Forum For outdoor seating. JavaScript is disabled. How to Read the Stamp - This Old House http://www.ecoprem.com/pdf/ecoprem_wood_technology_competitive_analysis.pdf. The current process is mostly computerized and mechanized using modern technology. Premium and select classifications and the percentage of clear wood are appearance grades used by some mills and retailers. 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. I hope you have a better understanding of what pressure treatment means and which grade and type is best for your project. Recommended where a combination of economical construction and good strength is desired. 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). Penetration is verified on-site by the third-party inspector before sending the assay zones to the agency laboratory for retention analysis. At the end of the pressurized period, the solution is pumped out and stored for use on the next batch. Recommended where high strength, stiffness and good appearance are desired. The table below identifies the main differences. Lumber is stamped after it is milled and prior to being pressure treated. While most residential pressure treated lumber is deemed safe for use, dust and particles can still be harmful. 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. Older growth wood is better but more expensive and difficult to find. The solution protects against insects, mold, mildew, fungus, and rot, and turns the wood a light brown hue. However, treated lumber may be kiln-dried or wet and will shrink, cup, and warp as it dries. #2 Prime grade southern yellow pine. Office: (850) 434-2611 | Toll Free: (800) 995-7742 Some types of timber have natural abilities while others need a boost. It is stamped S-GRN for surface-green or AD for air-dried. 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. Pressure treatment doesnt make the wood stronger or weaker, just more resistant to insect and moisture damage. 32524-0915 hbbd``b`i@i`}{" s@BHpE ^ !RHp@00 30 . endstream endobj startxref 0 %%EOF 162 0 obj <>stream (@ 2=h/jO,,5rB G 5~7 ol}E|Cf6zg/I !^ endstream endobj 144 0 obj <>stream If the wood is #1, it is stamped #1. 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. Here is a list and description of some of them. 32524-0915 | Office: (850) 434-2611 | Fax: (850) 434-1290. 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. Decking materials such as 26 and 5/46 frequently are of better-looking #1 and #2 lumber. IMO when buying PT for above ground use, quality and appearance is what counts. This Old House general contractor Tom Silva usually buys stacks of No. To qualify for a SPIB grade-marking license, a mill must have verified credentials in the manufacturing, seasoning, and grading of Southern Pine lumber. For complete information about types of preservatives, the latest industry standards, product identification and specification guidelines, refer to SFPAs booklet,Pressure-Treated Southern Pine (download in Publications). 2 x 4 x 20' Prime Pressure Treated #2 Lumber *BUY IN BULK* AND SAVE SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. Recommended for same purposes as Construction grade. Got the ledger #2 GC from the lumber yard. The accredited inspection agency, manufacturer, and plant are also commonly on the label but may be available in the bar code. As I understand it, the grade refers to the number of knots in a given length. SPIB performs these functions through the accreditation of the American Lumber Standard Committee (ALSC) as appointed by the Department of Commerce. MSR lumber is also required to meet certain visual grading requirements. Spi-1 and Spi-B control the expression of the Grap2 gene in B cells SYP holds almost 85% of the U.S. pressure treated market. IQC results of treatment for each charge are required to be documented in the plant records to correspond to the individual charge reports. Like all lumber, the fewer knots, blemishes, or defects, the higher the grade. Recommended for general construction purposes where appearance is not a controlling factor. A joist made of Douglas fir, for instance, will cover a greater span than a hemlock joist of the same size and grade. Largest hole permitted is 1/16". Tell us how we're doing! Specification Guidelines - Southern Pine No.1 Prime No.2 Prime H ighqu al ty, m ed nc r sfo .