This website is presented by SFPA members, including: 2023 Southern Forest Products Association. 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. Then I worked to live. 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. Its appearance ranking requires it to be 75% free of knots or defects. Top-quality lumber 2x4 through 2x12 are either #2 Prime grade, #2 & Better/Appearance grade or #1 grade. Pressure treatment doesnt make the wood stronger or weaker, just more resistant to insect and moisture damage. Another brand of heat treated wood that can be used for decking. This approach is intended to consider the big picture trends as opposed to allowing otherwise isolated issues to severely affect plant performance status. Ground contact means anything within 6-inches of the ground or in contact with the ground, foliage, grasses, or over water or wet areas. 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. Advances in preservative treatments, environmental management and sustainable forestry practices make treated wood an ecologically sound building material. The size, location, and the number of knots and other defects, and the slope of the wood grain affect the structural strength of lumber. Treated wood is made from strong evergreen species making it suitable for most building projects. Treated wood products must meet very specific quality requirements to meet the building code. Our next Blog will take the samples to the SPIB laboratory for analysis to determine if retention values are conforming. Utility grade is #3 grade lumber and has even fewer restrictions regarding knots and defects compared to other grades. Within all grades, there are planks that will be freer of blemishes and knots and may be called premium. In appearance, it is at least 57% clear of defects. 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. 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. Being 80% or more clear of defects, it is often used for cabinetry, furniture, and trim. The grade of lumber is noted SS, #1, #2, #3, or STUD and the price reflects the quality. Best appearance (compared to Standard) High-quality lumber Smaller and fewer knots Standard Grade: Use when a rustic appearance is desired. Different types of treated lumber are used in many aspects of residential, commercial, and industrial construction where moisture or ground exposure may occur. 1s and Selects, to boot. Green unseasoned lumber fresh from the mill is labeled either air-dried (AD) or surface-green (S-GRN). I don't think HD carries it. Each charge is tallied as to the specific Production Category that will be used to determine the level of sampling to be performed in the plants treated wood inventory. 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. End-glued, face-glued, and edge-glued Southern Pine in glued assemblies, including stress-rated grades of finger-jointed 2" Dimension Lumber. 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. Grade based on No.2 Dimension Lumber except wane and other characteristics that affect appearance are limited. Use UC3A pressure treated lumber for above ground exterior projects. Pressure treated lumber is available in 1, 5/4, 2, 4, and 6 nominal thicknesses, and widths up to 12. The kd19 is the customers assurance that it was dried to the proper level before it left the plant. 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. Termawood is an unique technology that uses heat treatment for timber processing to significantly improve various characteristics of wood. Eugene has been a DIY enthusiast for most of his life and loves being creative while inspiring creativity in others. The cores are then dried and ground for the purpose of analyzing the dust by x-ray, titration or gas chromatography methods. Recommended for construction where high strength, stiffness and good appearance are desired. Most lumber in my area is listed as Prime or Premium depending on the box store and is stamped #2 or #2 & BTR. The greater the content of preservatives denotes the type and use of the treated wood. Recommended for moulding and millwork applications. 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. It is stamped S-GRN for surface-green or AD for air-dried. H\n0l/$x\$-"-! A number that identifies the mill where the lumber was produced. By submitting your email, you agree to our, 5 Easy Ways to Remove Scratches from a Glass Window, Build It | Shaker End Table with Char Miller-King, Do Not Sell or Share My Personal Information. Timber Grades have similar characteristics to the corresponding grades of dimension lumber. it's primarily 2x planks. CCA is a mixture of chromium, copper, and arsenic that turns wood green. 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 . 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. IQC results of treatment for each charge are required to be documented in the plant records to correspond to the individual charge reports. 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. Tell us how were doing! It is a very strong and stiff softwood, and dense too. Lumber that is KD (kiln-dried) or S-DRY (surface-dry) has a moisture content that is lower, between 16% and 19%. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! The amount of chemical retained determines how resistant the lumber will be. Free of pitch pockets, pitch streaks and medium pitch on one wide face, but otherwise conforms to No.1 Dense or No.1 Dimension Lumber. The type and dimension influence the strength of the timber. has the outer 0-0.6 removed while lumber thicker than 2 (44, 46, 66) has the outer 0-1.0 removed for assay. 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. Pressure treatment of lumber has come a long way in the past 100 years. hbbd``b`i@i`}{" s@BHpE ^ !RHp@00 30 .
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No 4x or 6x stuff that you might use for skids. Pressure treatment is an affordable alternative to expensive naturally rot-resistant lumber. Thanks to all, ill never outlive ground contact or not, but maybe for the kids ill go with the lumber yard ground contact since they did the quote and its not much more dough. 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. Some on this forum think that is a waste of time, but I think it extends the life of the lumber. High utility value where appearance is. However, enough gets into the wood to provide a shell of protection that cant be matched with a brush. In ancient times the Greeks used olive oil, the Romans tar, and others used pitch or lye. The cores are removed by a specialized boring bit on the edge of the lumber, near the mid-length of the piece. MSR lumber is distinguished from visually stress graded lumber in that each piece is non-destructively tested. 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. 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. Tom saves money by ordering S-GRN wood when framing a new house, figuring that all the wood will air dry at the same pace. In appearance grade, the planks are 66% clear wood. 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. 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. This process is required through the plants Internal Quality Control (IQC) for all treated lumber products to be represented as meeting an applicable standard. The molecular changes in wood composition result in unique features: Tough to find decent boards. 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. As a result, we have more grades available to our customers now than at any other time in the history of our company. Used for such purposes as studding, blocking, plates, bracing and rafters. To qualify for a SPIB grade-marking license, a mill must have verified credentials in the manufacturing, seasoning, and grading of Southern Pine lumber. The species and grade, however, affect the spacing between supports with #1 often rated for greater spans. The chamber is then flooded with a diluted chemical solution, and hydraulic pressure applied for 20 to 60 minutes to force the solution deeper into the wood. spib no. Premier structural grades. Machine Stress Rated (MSR) lumber is evaluated by mechanical stress rating equipment. Each charge sheet is reviewed to verify that all IQC requirements have been met and properly documented. My 2-Story Addition Build in Progress Link . Pressure treated lumber has been infused with preservatives to prevent rot and insect damage. Southern Pine's ease of treatability has made it the preferred species when pressure treatment with wood preservatives is required. The preservatives dont affect the load-bearing abilities, just provide protection against insect, mold, mildew, and rot damage. Pressurization then forces the liquid deep into the wood. s s http://www.ecoprem.com/pdf/ecoprem_wood_technology_competitive_analysis.pdf. Decking materials such as 26 and 5/46 frequently are of better-looking #1 and #2 lumber. Select Structural (SS) is the highest grade based on strength and durability. UC5A has almost double the weight of chemical protection as UC4C, and UC5B and UC5C both have more than three times the amount found in UC4C. It can be used to span greater distances, an SPF SS 28 will reach 15-3. I'm redoing my deck surface and the lumber yard stocks only prime lumber. The grades are stamped prior to the wood being treated, so are the same for both treated and untreated. Species and Sizes Of Pressure Treated Wood, Different Kinds of Softwoods That Are Pressure Treated, Tips for Working with Pressure Treated Wood, Types of Pressure Treated Lumber and Where to Use Them, Sill & bottom plates, damp locations, basement framing, bathrooms, flooring, baseboards, Exterior Above Ground, Coated with Rapid Runoff, Exterior Above Ground, Uncoated or Poor Runoff, Cedar shakes, exterior stairs, joists, beams, decking, railings and fence boards/pickets, any wood within 6 of soil & vegetation, Fence, deck & structural posts, ledgers, retaining walls, garden boxes, any wood within 6 of soil, vegetation, or freshwater, or poor air circulation, As with UC4A plus posts set into the ground, retaining walls, wood foundations & supports, freshwater contact, saltwater spray, garden & utility posts, Pilings or wood in direct installation in soil, gravel, concrete, freshwater, or extreme weather exposure, Contact & immersion in cold ocean waters north of Long Island & San Francisco, docks, piers, wharves, shore walls, boardwalks, & buildings, Contact & immersion in warmer ocean waters south of San Francisco and Long Island, and similar to UC5A, Contact & immersion in warm Gulf Coast waters & south of Georgia, and similar to UC5A, Interior construction, no ground or moisture contact, fire partition walls, kitchens, hallway & stairwell framing, Exterior construction, exposure to weather but not ground contact, porches, exterior stairs, window treatments, Tight and well-spaced, and no larger than 2-3/4 on a 28, Well-spaced and no larger than 3-1/2 on a 28, 1/4 the thickness and 1/4 the width full length, or not greater than 1/2 the thickness or 1/3 the width for 1/4 of the length, 1/3 the thickness and 1/3 the width full length, or not greater than 2/3 the thickness or 1/2 the width for 1/4 of the length, Checks separation across or through growth rings due to seasoning, Unlimited surface seasoning checks with through checks limited to splits, Skips surfaces that were missed or failed to clean, Maximum of 5% of the plank or 2 or less in length, Shake lengthwise separation through or between growth rings, Limited as splits if through or 2 long on the surface only, Limited as splits at ends if through or 2 long if well separated, or maximum of 3 or 1/4 the length if surface only, Warp bow, crook, cup, twist, or any combination, Sapwood stained or firm heart or red heart stain, No limit to sapwood stained or firm heart stain or red heart. r 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. 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. Resistance to biological decay is 15-25 times higher then of untreated wood 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. 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. We think it is only appropriate to attempt to describe these grades for your reference to help you better understand what you currently stock and what is additionally available to you and your customers. Pro Note: All copper-based wood preservative solutions will corrode unprotected iron and steel brackets and fasteners. However, treated lumber may be kiln-dried or wet and will shrink, cup, and warp as it dries. Charges found non-conforming, either through plant IQC or third-party, are isolated for correction and the corrective actions are to be documented accordingly. #2 Prime Grade has a maximum hole size of ". Some wood goes through a machine that incises small cuts into the surfaces for deeper chemical protection. Selecting the correct type of treated wood for a project often depends on how and where it will be used. Maximum spans were calculated using design . Got your hard hat and high-vis vest? it also has several good links. HD and Lowe's only had lower grade. For appearance, it must be 29% clear of defects. Different chemicals have been used in the preservative bath, with changes being made to limit health risks to humans and animals. Twenty cores are taken randomly throughout the charge to measure the depth of preservative penetration in each core. Pressure treated plywood is also available in thicknesses from 1/4 through 3/4. 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. x 12 in. SPIB is subject to continual review by IAS to ensure that the laboratory and agency records remain in compliance. Application of the product requires pressure treatment by an approved treating process and preservative for. Generally sound and tight-knotted. Penetration is verified on-site by the third-party inspector before sending the assay zones to the agency laboratory for retention analysis. One even identifies its pressure treated pine fence boards as D & better so its appearance has small pin knots and some other blemishes. 6^,fniSgdc24.L7` b. "Stud" is a fifth designation, meaning it's good for a load-bearing wall. Box 10915 Pensacola, Fl. Some lumber is also treated for fire protection and used throughout different areas of residential, commercial, and industrial construction. An economical roof decking which conforms to No. Recommended for general construction uses. %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 The wood is 43% clear for appearance grading. Outside building projects and even some damp areas inside require wood that is resistant to moisture damage. Superior product suitable for a wide range of uses including shelving, boxing, crating, and form lumber. I do like to cover the tops of the joists and beams with ice and water shield. SPIB is accredited through IAS and maintains ISO certification as both an inspection agency (ISO 17020) and a Laboratory (ISO 17025). It should be noted, #2 & BTR does not mean #1. Charges that are documented as conforming for penetration and retention by IQC results are subject to re-inspection by the agency to verify penetration and retention. Fax: (850) 434-1290. SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. Gives the trademark or number of the mill of origin. It holds nails, screws, and other fasteners well, and is commonly used in residential, industrial, and commercial construction. No.2 Non-Dense No. 2 lumber, which provides good strength at a reasonable price. S;t HmM~[3`~Dl1Cj^x{}g.-GWlEu
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XX=xEzGjB By the end of the article, youll have a better understanding of what different pressure treatments mean, and how to select the grade and type for the use you intend. 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. o>>QS-RSnwO4piq4Szh+jkS3NQn(:;^unn^}Q8ws{7sFS 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. Dimension stability improves 12-17 times compared to untreated wood 32524-0915 | Office: (850) 434-2611 | Fax: (850) 434-1290. Douglas fir has a tight close grain cell structure making it stronger and less prone to warping and twisting than pine. A high-pressure period is then undergone to push the preservative deep into the wood. Tel: 251-457-6872. It often links with the logo or symbol of the association that oversees the grading at that mill. Most likely it is a treated board, since most treated lumber is sold wet, some yards sell K.D.A.T. Grade based on No.1 Dimension Lumber except wane and other characteristics that affect appearance are limited. Recommended for same purposes as Construction grade. This specific set of data for each charge is called a charge report. 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. 43:Gs *
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Building codes, inspectors, builders, engineers, and other professionals use the grades to make sure structures are safe for use. |fqqq~^;mffvf-5wV)64O?q30baveaj^-l*)+1$D>Vnm:OP0C#ddu1;r:8wwQKww3)IKLQ. Treatment with preservatives protects wood that is exposed to the elements, in contact with the ground or subjected to high humidity. the Southern Pine Inspection Bureau (SPIB) Standard Grading Rules for Southern Pine Lumber. Establishes lumber quality based on a graders visual inspection. It is stronger than #2 or #3 grade lumber. Appearance is same as D Finish for thicknesses 4" and less and widths 12" and less. 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. 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. 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). Before a given charge can actually go into the plants treated inventory to be ready for shipment, it must first be evaluated for penetration. SPIB also inspects mills that manufacture and label various lumber products under these rules. Check sources of supply for available grades and sizes. t|]UE)@Whi`_@z>'}8/p}8c 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. The best pressure treated wood for decks is Select, #1 or #2 grade wood. Pressure treated lumber has been treated with a chemical solution to protect it from insects, mold, mildew, and rot. 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. SYP holds almost 85% of the U.S. pressure treated market. (Kiln Dried After Treatment). http://www.anthonyforest.com/pdfs/AWPA-Use-Category-System-U1-07.pdf. 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. Too much. Modern chemical baths and pressurization began in the early half of the 20th century. All lumber must identify the association or agency accredited with overseeing the grading MLB is the Maritime Lumber Bureau. Lumber must be stamped for strength by a trained inspector and identified with a legitimate stamp. The solution protects against insects, mold, mildew, fungus, and rot, and turns the wood a light brown hue. It's usually stapled to the wood and isn't a requirement to be on the actual stamp. 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 . Good-quality sheathing, fencing, shelving and other general purpose uses. Wood treated with water-based preservatives for saltwater immersion has significantly higher retention levels than other types and categories. The grading is standardized and consistent for structural strength across the U.S. and Canada. r More knots than Premium grade x 8 ft. #2 Prime or Better Ground Contact Pressure-Treated Lumber is a . Similar in appearance to No.1 Dimension Lumber. Kiln-dried wood is lighter, easier to work with, and less likely to split. Combination for B&B and C grades; satisfies requirements for. Good appearance, but graded primarily for strength and serviceability. Those stacks also include some No. 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). Once on the drip pad, the material will stay until it is dry enough to be moved into the plants treated inventory. Larger sizes conform to Dense Structural 65 Structural Lumber except for dense grain requirement. Well-manufactured material evaluated by calibrated mechanical grading equipment which measures certain properties and sorts the lumber into various strength classifications. For demanding applications, such as interior load-bearing walls, hell pay extra for these stronger grades. He is passionately interested in home improvement, renovation and woodworking. Pressure treated wood for ground contact commonly has twice the chemical retention level as above ground rated lumber. I hope you have a better understanding of what pressure treatment means and which grade and type is best for your project. 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.
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