THE TREATING PROCESS, QUALITY AND IQC RESPONSIBILITIES. Twenty cores are taken randomly throughout the charge to measure the depth of preservative penetration in each core. As I understand it, the grade refers to the number of knots in a given length. 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. hbbd``b`i@i`}{" s@BHpE ^ !RHp@00 30 . endstream endobj startxref 0 %%EOF 162 0 obj <>stream I do like to cover the tops of the joists and beams with ice and water shield. The chemical treatment makes the wood resists insects, mold, mildew, and rot but not moisture-proof. (@ 2=h/jO,,5rB G 5~7 ol}E|Cf6zg/I !^ endstream endobj 144 0 obj <>stream 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. No matter what it is called or tagged, it should bear a stamp on the wood surface identifying it as SS, #1, # 2, or #3. Fax: (850) 434-1290. There are many other uses for pt lumber, including docks, boathouses, sheds, boardwalks, play structures, gazebos, and the list goes on. Usable lengths suitable for bracing, blocking, bulkheading and other general utility purposes where strength and appearance are not a consideration. Recommended for uses where high strength, stiffness and good Review this helpful illustration showing the proper application of pressure-treated Southern Pine materials for a variety of projects around the home. 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. 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. For additional information on the proper handling and storage of pressure-treated Southern Pine materials,click here. Typically, the first step of a third-party agency audit involves a review of the plants records. 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. I grabbed an exerpt here and there and put it all together, for I was on a lot of different sites and suppliers. Modern chemical baths and pressurization began in the early half of the 20th century. 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. Decking materials such as 26 and 5/46 frequently are of better-looking #1 and #2 lumber. Borates are sodium salts used in water-based pressure treatment solutions. Non-stress rated, but economical for general utility purposes such as bracing, blocking, bulkheading, etc. It holds nails, screws, and other fasteners well, and is commonly used in residential, industrial, and commercial construction. 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 . 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. 2 lumber, which provides good strength at a reasonable price. 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. #1 #2 prime etc deals with the quality of the board. Application of the product requires pressure treatment by an approved treating process and preservative for. Lumber may have one hole every 3 and any splits must not be bigger than the plank is wide. *Load duration factors greater than 1.6 shall not apply to structural members pressure-treated with water-borne . Office: (850) 434-2611 | Toll Free: (800) 995-7742 A quick depressurization cycle then removes any excess from the wood before it is removed from the treatment cylinder. 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 Top-quality lumber 2x4 through 2x12 are either #2 Prime grade, #2 & Better/Appearance grade or #1 grade. Eugene has been a DIY enthusiast for most of his life and loves being creative while inspiring creativity in others. An internet search says it has to do with less knots and quality, and that #1 is of higher quality. It is not as strong as the other grades and is commonly used for where it wont be visible, and light framing purposes such as bracing, crates, and pallets. Pressure treated wood can also be stained or sealed to enhance its color and for added protection. Establishes lumber quality based on a graders visual inspection. maple, oak, birch, etc. HD and Lowe's only had lower grade. However, some KD-HT wood at your local lumber yard might have a tag on the end of the lumber that specifies PT. See Finish grades for face side; reverse side wane limitations are lower. 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. Hi Raymond, it looks like this 2 in. The stamp identifies the wood species, grade, moisture content, inspection organization, and the mill it came from. Pressure-treated wood can dry in about 1 month, whereas fresh wood provides an environment where fungi and bacteria produce rot and insects infest. Reasonably clear, but permits limited number of surface checks and small tight knots. %PZqI]Hx(or3'Z1Ld8&.u$eIJ{\,a(1I4;^?dB;|+abd` wX{M\f/=#S8NS6~#|oNQ5 Lj|< W-&A^N'*6|t79Ir8:]3Y -Q/A9h.BBvX >A3s*E3_2pS\5a Each charge sheet is reviewed to verify that all IQC requirements have been met and properly documented. Records, trained personnel and an approved, properly equipped laboratory (either in-house or an approved external lab) are also required to complement the penetration and retention sampling requirements. 1s and Selects, to boot. Fax: (850) 434-1290. Once on the drip pad, the material will stay until it is dry enough to be moved into the plants treated inventory. Design values only apply to utility lumber that is 4 wide. It is a very strong and stiff softwood, and dense too. The unique cellular structure of Southern Pine permits deep and uniform penetration of preservatives, rendering the wood useless as a food source for fungi, termites and micro-organisms. But not all defects are obvious. It must specifically be labeled ground contact. 32524-0915 | Office: (850) 434-2611 | Fax: (850) 434-1290. s This information will then be combined with previous plant data to determine the plant performance status, as mentioned above. Before a given charge can actually go into the plants treated inventory to be ready for shipment, it must first be evaluated for penetration. . Please keep in mind, that with the advent of prime grades, the differences between the grades of lumber have become even more defined and distinct. The wood is commonly used for light construction or framing where it isnt visible, or for bracing, packaging, and shipping purposes. 43:Gs * endstream endobj 143 0 obj <>stream Many pieces included in this grade would qualify as No.2 except for a single limiting characteristic. It can be used to span greater distances, an SPF SS 28 will reach 15-3. Pressurization then forces the liquid deep into the wood. Construction grade commonly refers to #1 grade lumber. H\Ak0:b @HZ=8&5FqjfvRut.I/55zb6+]5m&.wgUWm,ZM]nrO=gu${Tu?co2:4 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. Another brand of heat treated wood that can be used for decking. #2 Prime/Appearance Grade (APG): A step up from #2 in appearance, this grade will have characteristics . We've downsized and im already overimproved. 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. Both DIYers and building professionals will like these garden and outdoor living ideas and plans. 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. It is stronger than #2 or #3 grade lumber. Got the ledger #2 GC from the lumber yard. My electrical answers are based on 2017 NEC, you may have local amendments. SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. OK then thanks. 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 No 4x or 6x stuff that you might use for skids. The lumber is inspected for knots, splits, and other defects that can weaken the woods structural strength. Pressure treated to a Ground Contact retention of either ACQ or CA Chemical preservative. Pressure treated lumber is divided into different types based on the retention level or amount of preservative retained in the wood after treatment. Additionally, all cuts and drilled holes should be treated with preservatives to prevent damage to exposed untreated wood. Pressure-Treated Lumber 15 Span Tables . Myrtle Beach, SC. Knots must be well spaced and tight, so they wont fall out, and no larger than 2-3/4 in a 28. Tel: 251-457-6872. Timber Grades have similar characteristics to the corresponding grades of dimension lumber. H|TnT1}W1yi= hEN4Kg8 bvlbh%gCXcX]NDRnFiUH>.Sl6Vi\(f^j+d}IT#h3Si [j6sG1Pbh`sX9W.+|FdqvJY/nm Sd@{D 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. 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. The treating process includes an initial vacuum to remove the excess moisture and air to aid in the absorption process. Treated wood is made from strong evergreen species making it suitable for most building projects. He is passionately interested in home improvement, renovation and woodworking. The vacuumed cells more readily absorb the solution for better penetration. Final Price $ 27 40. each. Generally clear, although a. High quality, limited in characteristics that affect strength or stiffness. The two remaining designations, while not very useful to a homeowner, enable grading agencies to enforce their standards. Box 10915 Pensacola, Fl. Its appearance ranking is 80% or better clear of defects. It is stamped S-GRN for surface-green or AD for air-dried. 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. I didn't ask but I doubt the deck boards and 2x are ground contact which deals with the amount of preservatives used on the lumber. Largest hole permitted is 1/16". Allows well-spaced knots of any quality. The grade mark can include "1W" or "2W" if visually graded to the wane requirements for No.1 or No.2 dimension lumber, respectively. All rights reserved. Tell us how were doing! Recommended where a combination of economical construction and good strength is desired. The wood should be at least 6-inches above the ground, have good air circulation and drainage, and the components can easily be replaced. Outside building projects and even some damp areas inside require wood that is resistant to moisture damage. Best appearance (compared to Standard) High-quality lumber Smaller and fewer knots Standard Grade: Use when a rustic appearance is desired. Copyright 2023 This Old House Ventures, LLC. check out this FAQ web site. Structurally, an SPF #1 28 can be used to span distances of 14-11. 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).

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