One wide face and both adjacent narrow faces must be free of pith and/or heartwood. It has nothing to do with the wood being pressure treated (PT) at all. Raised floor homes look great and protect homeowners against risks from flooding and subsiding soils. All four longitudinal faces must be free of pith and/or heartwood. Recommended where high strength, stiffness and good appearance are desired. it would be unsuitable unless it is a naturally resistant wood such as teak or redwood. SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. The retention level is measured in pounds of chemical per cubic foot of wood (pcf). #2 Prime Grade has a maximum hole size of ". ? Excellent for painting or natural finish where requirements are less exacting. No 4x or 6x stuff that you might use for skids. 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). The treated wood is then taken to the yard to dry naturally or to the drying kilns before shipping to the retailer. #2 Prime grade southern yellow pine. 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. 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. Appearance is same as C Finish for thicknesses of 4" and less and widths 12" and less. Kiln-dried wood is lighter, easier to work with, and less likely to split. However, enough gets into the wood to provide a shell of protection that cant be matched with a brush. 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. Pressure treated lumber has been treated with a chemical solution to protect it from insects, mold, mildew, and rot. The certification identifies the grade rules used to grade the lumber for example, ALSC is the American Lumber Standard Committee and NLGA is the National Lumber Grades Authority. Good, serviceable sheathing; usable for many economical applications without waste. It is a very strong and stiff softwood, and dense too. Dont know how PT Pine looks. 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 stamp identifies the wood species, grade, moisture content, inspection organization, and the mill it came from. Grademarks. But in an existing house where the framing is already dry, hell use more stable, and more costly, KD lumber, or even MC-15 lumber, which has a moisture content of 15 percent or less. End-glued, face-glued, and edge-glued Southern Pine in glued assemblies, including stress-rated grades of finger-jointed 2" Dimension Lumber. For a better experience, please enable JavaScript in your browser before proceeding. I grabbed an exerpt here and there and put it all together, for I was on a lot of different sites and suppliers. Similar in appearance to No.1 Dimension Lumber. Resistance to biological decay is 15-25 times higher then of untreated wood Recommended where a combination of economical construction and good strength is desired. Pressure treated lumber has been infused with preservatives to prevent rot and insect damage. JavaScript is disabled. Myrtle Beach, SC. MCA can be used inside or out, above ground, in-ground, or in fresh-water contact residential areas. Those and other treatments are used for industrial purposes instead. I only use ground contact when the wood is actually touching the ground. Used for such purposes as studding, blocking, plates, bracing and rafters. Grade based on No.1 Dimension Lumber except wane and other characteristics that affect appearance are limited. ), how wood is used also comes down to whether or not it's pressure treated. An excellent decking grade that can be used face side down for roof decking or face side up for floor decking. Home Derpo person said that #2 is ground contact and stronger. An indicator is used to identify the untreatable, heartwood sections of the 20-core sample (Sapwood is the outer portion of the log; heartwood is the innermost portion of the log and is rarely capable of accepting preservative). Recommended for uses where high strength, stiffness and good The wood should be at least 6-inches above the ground, have good air circulation and drainage, and the components can easily be replaced. Lumber, posts, and ties range from 8 to 16 in length, although longer may be ordered. Similar in appearance to No.2 Dimension Lumber. Protecting wood against rot and insects has been done for centuries. };hax{Hk[qMkhpcge/*b7_W?!r*uEkGhKZS$_~Zuzrxx xo)>kf}sgn^k4$=!i[*5X,y-ZrZ1
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IS)VY23xe@YY_Q_Y_Q_Y_Q_Y_Q_Y_Q_u_BNt/;(.? There is no structural premium grade, it is strictly a term for bright looking wood free of blemishes or knots. Follow along as we decode the stamp and show you how to get the most lumber for your money. Research shows that . 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. The best pressure treated wood for decks is Select, #1 or #2 grade wood. THIRD-PARTY AGENCY AUDIT and SAMPLING PROCEDURES. {l@n7gM. {Vzgil=ecQ*Q\o[lb[9X^gZyzzxzxxxyO`}@}(% m6@93 gx$?yV7`{x"?W@_} s SYP holds almost 85% of the U.S. pressure treated market. The main tree species used in the manufacture of pressure treated lumber are softwoods that regionally predominate in the mill area. Southern yellow pine in the eastern U.S., spruce pine and fir in the northern U.S. and eastern-central Canada, and Douglas fir, fir, and hemlock in the western U.S. and Canada. Even if you are on the right track, you will still get run over if you just sit there. 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. This specific set of data for each charge is called a charge report. 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. Recommended for general construction uses. 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. Treated wood will shrink as it dries and expand when wet and may acquire surface checks and cracks over time. The SPIB Treated Wood Quality Audit Program provides a customized third-party quality control program to help Treated Wood producers meet industry-approved standards. It could be HT and then PTd later? Wood packaging material made of unprocessed raw wood is recognized as a pathway for the introduction and spread of pests. 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. Admits pieces below a No.3 grade which can be used without waste, or which contain less than 25% waste by cutting. Plant inspections are required to be performed at least once per month, but may be increased due to production and/or performance. 32524-0915 Box 10915 Pensacola, Fl. it's primarily 2x planks. Here is a list and description of some of them. The preservatives provide protection against rot, insects, mold, and fungi, so the wood lasts longer. As the wood dries, the preservative is left behind to protect against insects, mold, mildew, fungal growth, and rot. For additional information on the proper handling and storage of pressure-treated Southern Pine materials,click here. 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. Larger sizes conform to Dense Structural 65 Structural Lumber except for dense grain requirement. All rights reserved. IQC results of treatment for each charge are required to be documented in the plant records to correspond to the individual charge reports. A specific indicator or a specific method is then used to reveal the depth and consistency of preservative penetration. The scope of the ALSC review may also include physical inspection of treated wood products at the plant location to verify penetration and retention as a means of comparing against previous findings by the agency. Characteristics are limited to provide good strength and excellent serviceability. Economical, serviceable grade for natural or painted finish. Tell us how were doing! 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. The cores are removed by a specialized boring bit on the edge of the lumber, near the mid-length of the piece. The treating process includes an initial vacuum to remove the excess moisture and air to aid in the absorption process. Fax: (850) 434-1290. Typically, the first step of a third-party agency audit involves a review of the plants records. Grade based on No.1 Dimension Lumber except wane and other characteristics that affect appearance are limited. In this article, well explain pressure treated (pt) lumber, the different types and uses, and how it is graded. Now I must drink to work. Treatment with preservatives protects wood that is exposed to the elements, in contact with the ground or subjected to high humidity. Lumber is stamped after it is milled and prior to being pressure treated. 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. While most residential pressure treated lumber is deemed safe for use, dust and particles can still be harmful. Both DIYers and building professionals will like these garden and outdoor living ideas and plans. 1, No. We've downsized and im already overimproved. #1 is better. Most likely it is a treated board, since most treated lumber is sold wet, some yards sell K.D.A.T. Pressure-Treated Pine meets the highest grading standards for strength and appearance. However, they make an ideal solution for use in arid or dry locations. The species and grade, however, affect the spacing between supports with #1 often rated for greater spans. Stud is a fifth designation, meaning its good for a load-bearing wall. Twenty cores are taken randomly throughout the charge to measure the depth of preservative penetration in each core. This website is presented by SFPA members, including: 2023 Southern Forest Products Association. Youll get less movement with kiln-dried (KD) or surface-dry (S-DRY) lumber, which has a moisture content between 16 and 19 percent. #1 will have less knots and is typically spec'd for joists and rafters. 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. My 2-Story Addition Build in Progress Link . Pressure treated wood used for in-ground or critical use has a greater retention level than timber used for above or ground contact. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Then I worked to live. Most is not. 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. H\n0l/$x\$-"-! 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. #2 or #1 is the quality. http://www.ecoprem.com/pdf/ecoprem_wood_technology_competitive_analysis.pdf. endstream
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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. Once penetration is verified, the outer section of the cores is removed to measure the amount of preservative retained. Unfortunately, the water-soluble nature makes them susceptible to leaching out in rainy or wet areas, or near standing water. However, treated lumber may be kiln-dried or wet and will shrink, cup, and warp as it dries. 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. Wood treated with water-based preservatives for saltwater immersion has significantly higher retention levels than other types and categories. It must specifically be labeled ground contact. Its moisture content of 19 percent or more makes it inexpensive, but it can move unpredictably as it shrinks and dries. Recommended for general framing purposes. Selecting the correct type of treated wood for a project often depends on how and where it will be used. Pressure treatment doesnt make the wood stronger or weaker, just more resistant to insect and moisture damage. Not all PT is rated for ground contact. MSR lumber is also required to meet certain visual grading requirements. Pressure treated plywood is also available in thicknesses from 1/4 through 3/4. 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. There are many other uses for pt lumber, including docks, boathouses, sheds, boardwalks, play structures, gazebos, and the list goes on. 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. 43:Gs *
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It often links with the logo or symbol of the association that oversees the grading at that mill. Wood Packaging Material (WPM). In ancient times the Greeks used olive oil, the Romans tar, and others used pitch or lye. MCA is an environmentally friendly water-based preservative considered safe for humans and animals and is an alternative to CCA. Standard grade lumber has more defects and knots and is #2 structural grade wood. 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. 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. The molecular changes in wood composition have a result of dimensional stabilization, protection against rot and wither, and as a result, expanded use opportunities. Like all lumber, the fewer knots, blemishes, or defects, the higher the grade. Using expensive wood that is naturally resistant may not fit the budget. As a result, we have more grades available to our customers now than at any other time in the history of our company. Final Price $ 27 40. each. Has a better appearance than No.1 Dense Dimension Lumber because of additional restrictions on firm red heart, pith, knots and wane. There are many questions about the different treated wood products in our market today. Tough to find decent boards. Modern chemical baths and pressurization began in the early half of the 20th century. Different chemical solutions are used to create treated lumber. Im not going to struggle with huge bows and twisting. 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. Treated posts or ties readily available at yards and stores are 35, 44, and 66; 88 is also available but may be a special order. Any lumber experts out there that can confirm KD HT is ok for a new deck? hb```"/VI ealR]2L
7] u~m>^;+g=ll&Cv)!N&%5g~IK1 SPIB performs these functions through the accreditation of the American Lumber Standard Committee (ALSC) as appointed by the Department of Commerce. 32524-0915 Tel: 843-236-9399. 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. My HD carries some ground contact PT. This Old House general contractor Tom Silva usually buys stacks of No. Pressure treatment of lumber has come a long way in the past 100 years. This process is required through the plants Internal Quality Control (IQC) for all treated lumber products to be represented as meeting an applicable standard. A Production Category is defined as a given preservative, specie and retention combination. #2: When appearance is of moderate concern, this grade will contain moderate size knots and can have a considerable amount of wane. However, it shouldnt be used where it comes in contact with food or animal feed. s Re-inspection of plant production is performed on a routine frequency by the agency. Denotes the woods species or a group of species with similar strengths. x 8 ft. #2 Prime or Better Ground Contact Pressure-Treated Lumber is a . 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. She said that some of the new PT looks so much like untreated they have to add a color enhancer to it. Recommended where appearance and strength are a consideration. 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. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! #1 grade can have more wane (or bark) Got the ledger #2 GC from the lumber yard. This approach is intended to consider the big picture trends as opposed to allowing otherwise isolated issues to severely affect plant performance status. r 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 x 12 in. 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. . A number that identifies the mill where the lumber was produced. Mobile, AL. SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. No.2 Non-Dense No. 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. Eugene has been a DIY enthusiast for most of his life and loves being creative while inspiring creativity in others. A joist made of Douglas fir, for instance, will cover a greater span than a hemlock joist of the same size and grade. But using bigger joists of a cheaper species might save you money without loss of strength. Structurally, an SPF #1 28 can be used to span distances of 14-11. #1 will have less knots and is typically spec'd for joists and rafters. The grade-mark must contain the first four items listed below; the fifth item is optional. 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. 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. To qualify for a SPIB grade-marking license, a mill must have verified credentials in the manufacturing, seasoning, and grading of Southern Pine lumber. This website is presented by SFPA members, including: 2023 Southern Forest Products Association. Good appearance, but graded primarily for strength and serviceability. SPIB is accredited through IAS and maintains ISO certification as both an inspection agency (ISO 17020) and a Laboratory (ISO 17025). Got your hard hat and high-vis vest? 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. Well-manufactured material evaluated by calibrated mechanical grading equipment which measures certain properties and sorts the lumber into various strength classifications. The grades are stamped prior to the wood being treated, so are the same for both treated and untreated. Trex gets awfully hot also and demands upkeep. The look of the wood is only important if it is highly visible, such as deck boards, railings, and other visible structural members. Some mills may then identify it A, B, C, or D for appearance based on how clear or free it is of knots and blemishes. All Scaffold Plank design values are calculated using ASTM Standards D245 and D2555. Composite of No.3 strength and No.1 nailing edge characteristics for a better nailing surface. SPIB is subject to continual review by IAS to ensure that the laboratory and agency records remain in compliance. There are different types of treatment and lumber grades for different uses. The table below identifies the main differences. Lumber structurally graded #1 or #1 & BTR (#1 and better) has a wood grain slope of 1 in 10. The ranking goes from Select Structural (highest strength, best appearance) to No. Tell us how we're doing! r Knots must be well spaced and tight, so they wont fall out, and no larger than 2-3/4 in a 28. Recommended where appearance and strength are a consideration. It is used to build exterior stairs, for posts, sheathing, siding, porches, decking, and railings too. '\ & Ls30+X61j\e(gV]]M(q9qs)loyM 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 is used for all areas of residential construction from load bearing to trim. Copyright 2022Culpeper Wood Preservers | All rights reserved. A high-pressure period is then undergone to push the preservative deep into the wood. &_ePM&dWCh 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. www.strongtie.com/products/ptwoodfaqs.html, FAQ: Pressure-Treated Wood | Simpson Strong-Tie. Combination for B&B and C grades; satisfies requirements for. 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. Green Bay Blizzard Tryouts 2021,
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