It is a very strong and stiff softwood, and dense too. Pressure-treated wood can dry in about 1 month, whereas fresh wood provides an environment where fungi and bacteria produce rot and insects infest. It was widely used as a preservative from the mid-1930s to 2004. PDF AC2 Pressure Treated 8:16 - Midwest Manufacturing 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. Denotes the woods species or a group of species with similar strengths. Each charge sheet is reviewed to verify that all IQC requirements have been met and properly documented. Our next Blog will take the samples to the SPIB laboratory for analysis to determine if retention values are conforming. check out this FAQ web site. Severe Weather 2-in x 6-in x 12-ft #2 Prime Wood Pressure Treated Lumber However, they make an ideal solution for use in arid or dry locations. . How to Read the Stamp - This Old House Lumber Grade Stamps - InterNACHI - International Association of 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. Tough to find decent boards. SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. |fqqq~^;mffvf-5wV)64O?q30baveaj^-l*)+1$D>Vnm:OP0C#ddu1;r:8wwQKww3)IKLQ. Home Derpo person said that #2 is ground contact and stronger. (See Wood Code, below). What is the Best Pressure Treated Wood for Decks? Exciting stuffyou wont want to miss that! I only use ground contact when the wood is actually touching the ground. Termawood vapor-stabilization technology is a patented wood heat treatment technology, utilizing a natural thermochemical reaction and steam at temperatures of 230-240 C without ANY chemical additives. High quality, limited in characteristics that affect strength or stiffness. 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. The type identifies the amount of chemical retention which in turn determines how or where to best use the lumber. 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. 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. The vacuumed cells more readily absorb the solution for better penetration. The preservatives dont affect the load-bearing abilities, just provide protection against insect, mold, mildew, and rot damage. My HD carries some ground contact PT. 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. Tags: None The Duke It's easy to work with. Dont know anything about the HT lumber, but if you are in the west, the PT is still Western Hemlock and looks pretty much the same as before. H|TnT1}W1yi= hEN4Kg8 bvlbh%gCXcX]NDRnFiUH>.Sl6Vi\(f^j+d}IT#h3Si [j6sG1Pbh`sX9W.+|FdqvJY/nm Sd@{D SYP Dimension Lumber Specifications | Canfor May 26, 2016. Appearance is same as C Finish for thicknesses of 4" and less and widths 12" and less. Allows well-spaced knots of any quality. They dont discolor the wood and protect against insects, molds, mildew, and fungi. This Old House general contractor Tom Silva usually buys stacks of No. SPIB is accredited through IAS and maintains ISO certification as both an inspection agency (ISO 17020) and a Laboratory (ISO 17025). Larger sizes conform to Dense Structural 65 Structural Lumber except for dense grain requirement. 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. MCA can be used inside or out, above ground, in-ground, or in fresh-water contact residential areas. Lumber Products | Southern Pine Lumber Company Pressure treated lumber commonly is end-tagged with an information label before leaving the plant. #1 grade can have more wane (or bark) No 4x or 6x stuff that you might use for skids. It must specifically be labeled ground contact. it's primarily 2x planks. The wood weathers better than untreated wood and wont gray or discolor as quickly. Hi Raymond, it looks like this 2 in. At the end of the pressurized period, the solution is pumped out and stored for use on the next batch. Get the latest This Old House news, trusted tips, tricks, and DIY Smarts projects from our expertsstraight to your inbox. Recommended for general construction uses. PDF Reference Design Values for Visually Graded Southern Pine Dimension I grabbed an exerpt here and there and put it all together, for I was on a lot of different sites and suppliers. MCA is an environmentally friendly water-based preservative considered safe for humans and animals and is an alternative to CCA. 2 Dimension Lumber characteristics. Once penetration is verified, the outer section of the cores is removed to measure the amount of preservative retained. Recommended where a combination of economical construction and good strength is desired. Application of the product requires pressure treatment by an approved treating process and preservative for marine usage. This double treated Ground Contact lumber must be used for applications where treated lumber is difficult to maintain, repair or replace. Charges found non-conforming, either through plant IQC or third-party, are isolated for correction and the corrective actions are to be documented accordingly. Application of the product requires pressure treatment by an approved treating process and preservative for. She said that some of the new PT looks so much like untreated they have to add a color enhancer to it. But using bigger joists of a cheaper species might save you money without loss of strength. This information must include the charge number, treatment date, products treated, tally, cycle parameters and preservative solution strength for each charge. Twenty cores are taken randomly throughout the charge to measure the depth of preservative penetration in each core. @_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 Pressure treated wood for ground contact commonly has twice the chemical retention level as above ground rated lumber. All lumber must identify the association or agency accredited with overseeing the grading MLB is the Maritime Lumber Bureau. I did some research and found that they only staple the PT label to the end of the boards in many cases. The longer the wood is in the pressure chamber, the greater the content of chemical preservatives forced into and retained in the wood. The process is similar for treating milled lumber, plywood, posts, or utility poles against rot and insects. 2 grade lumber, commonly referred to as "#2 & Btr" is used where high design values are required and high appearance in not a factor. Once on the drip pad, the material will stay until it is dry enough to be moved into the plants treated inventory. 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. };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/;(.? VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. All rights reserved. s Wood treated with water-based preservatives for saltwater immersion has significantly higher retention levels than other types and categories. SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. Plant inspections are required to be performed at least once per month, but may be increased due to production and/or performance. 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). A joist made of Douglas fir, for instance, will cover a greater span than a hemlock joist of the same size and grade. 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. The stapled on label will have w/CE to indicate with color enhancement, she is correct. Lumber Grades - ProWood lumber Pressure treated lumber is available in 1, 5/4, 2, 4, and 6 nominal thicknesses, and widths up to 12. For demanding applications, such as interior load-bearing walls, hell pay extra for these stronger grades. Box 10915 Pensacola, Fl. It's distinctive wood grain appearance is great for decorative finishing. Has a better appearance than No.1 Dense Dimension Lumber because of additional restrictions on firm red heart, pith, knots and wane. Lumber is stamped after it is milled and prior to being pressure treated. Overly dry wood often needs a pilot hole before fastening to prevent splitting. Not all PT is rated for ground contact. it is damn difficult to tell the differance on the new stuff. Pressure treatment is an affordable alternative to expensive naturally rot-resistant lumber. The treated wood is then taken to the yard to dry naturally or to the drying kilns before shipping to the retailer. It holds nails, screws, and other fasteners well, and is commonly used in residential, industrial, and commercial construction. 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.
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