The stapled on label will have w/CE to indicate with color enhancement, she is correct. r High utility value where appearance is. A quick depressurization cycle then removes any excess from the wood before it is removed from the treatment cylinder. Allows well-spaced knots of any quality. 139 0 obj <> endobj 153 0 obj <>/Filter/FlateDecode/ID[]/Index[139 24]/Info 138 0 R/Length 80/Prev 801267/Root 140 0 R/Size 163/Type/XRef/W[1 2 1]>>stream Recommended for general construction purposes where appearance is not a controlling factor. 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. Dimension stability improves 12-17 times compared to untreated wood The look of the wood is only important if it is highly visible, such as deck boards, railings, and other visible structural members. Using expensive wood that is naturally resistant may not fit the budget. Recommended for moulding and millwork applications. (KD-HT means the wood was also heat treated to kill pests, a requirement for imported lumber.) There is no structural premium grade, it is strictly a term for bright looking wood free of blemishes or knots. Grade based on No.2 Dimension Lumber except wane and other characteristics that affect appearance are limited. SPIB is a not-for-profit company that serves as the rules-writing agency for the Standard Grade Rules in Southern pine lumber. The clear appearance makes it a choice for trim, furniture, and cabinetry. Our Services | Lumber Services | Lumber that is 2 or less in thickness (24, 26, 5/4 decking, etc.) Lumber structurally graded #1 or #1 & BTR (#1 and better) has a wood grain slope of 1 in 10. 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. Some types of timber have natural abilities while others need a boost. 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. Premium is usually #1 or #2 grade lumber. Construction grade is #1 and Standard is #2. Appearance is same as D Finish for thicknesses 4" and less and widths 12" and less. It is used for all areas of residential construction from load bearing to trim. A joist made of Douglas fir, for instance, will cover a greater span than a hemlock joist of the same size and grade. Select Structural (SS) is the highest grade based on strength and durability. The size, location, and the number of knots and other defects, and the slope of the wood grain affect the structural strength of lumber. Minimum retention values are specified in the AWPA BOS for those preservative systems listed under AWPA and in the various Quality Manuals for those systems specified by a given ESR. 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. http://www.ecoprem.com/pdf/ecoprem_wood_technology_competitive_analysis.pdf. It could be HT and then PTd later? Both can be used for load-bearing purposes or other outdoor applications. ? Suitable for stud uses including use in load-bearing walls. To qualify for a SPIB grade-marking license, a mill must have verified credentials in the manufacturing, seasoning, and grading of Southern Pine lumber. Stud is a fifth designation, meaning its good for a load-bearing wall. 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). Machine Stress Rated (MSR) lumber is evaluated by mechanical stress rating equipment. Home Derpo person said that #2 is ground contact and stronger. The grading is standardized and consistent for structural strength across the U.S. and Canada. 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. 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. Even if you are on the right track, you will still get run over if you just sit there. IQC results of treatment for each charge are required to be documented in the plant records to correspond to the individual charge reports. Pressure treated lumber is available in 1, 5/4, 2, 4, and 6 nominal thicknesses, and widths up to 12. Abbreviations for framing-grade softwoods, from strongest to weakest, Doug Fir, D Fir- L: Douglas fir (L=western larch). It was widely used as a preservative from the mid-1930s to 2004. As the wood dries, the preservative is left behind to protect against insects, mold, mildew, fungal growth, and rot. Treated wood is made from strong evergreen species making it suitable for most building projects. 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. This website is presented by SFPA members, including: 2023 Southern Forest Products Association. Use UC3A pressure treated lumber for above ground exterior projects. 1s and Selects, to boot. Bruce, I found more info on the heat treated wood. Premium and select classifications and the percentage of clear wood are appearance grades used by some mills and retailers. While most residential pressure treated lumber is deemed safe for use, dust and particles can still be harmful. May 26, 2016. It can be used to span greater distances, an SPF SS 28 will reach 15-3. In appearance, it is at least 57% clear of defects. CCA is still used for industrial purposes today. Recommended for uses where high strength, stiffness and good appearance are desired. Larger sizes conform to Dense Structural 65 Structural Lumber except for dense grain requirement. Box 10915 Pensacola, Fl. For outdoor seating. The treating process includes an initial vacuum to remove the excess moisture and air to aid in the absorption process. Recommended where appearance and strength are a consideration. Recommended for same purposes as Construction grade. x 12 in. 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. MSR Scaffold Plank is available 2"-thick only. SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. (Kiln Dried After Treatment). Most of this new treated lumber looks untreated as compared to the old green stuff, I did learn that they add color to some of it to try and make it look more like treated. 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. SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. Building codes, inspectors, builders, engineers, and other professionals use the grades to make sure structures are safe for use. 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. Longleaf, shortleaf, loblolly, and slash are some of the native southeastern pines that are classified as SYP. Maximum spans were calculated using design . The type and dimension influence the strength of the timber. Quality control for treating should be done by an approved inspection agency. 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. Protecting wood against rot and insects has been done for centuries. s The type identifies the amount of chemical retention which in turn determines how or where to best use the lumber. I guess it is just a regional thing. Design values only apply to utility lumber that is 4 wide. However, some KD-HT wood at your local lumber yard might have a tag on the end of the lumber that specifies PT. ), how wood is used also comes down to whether or not it's pressure treated. SYP holds almost 85% of the U.S. pressure treated market. Utility grade is #3 grade lumber and has even fewer restrictions regarding knots and defects compared to other grades. I only use ground contact when the wood is actually touching the ground. Combination for B&B and C grades; satisfies requirements for. Unfortunately, the water-soluble nature makes them susceptible to leaching out in rainy or wet areas, or near standing water. Appearance is same as C Finish for thicknesses of 4" and less and widths 12" and less. 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 did some research and found that they only staple the PT label to the end of the boards in many cases. It often links with the logo or symbol of the association that oversees the grading at that mill. They dont discolor the wood and protect against insects, molds, mildew, and fungi. Copyright 2023 This Old House Ventures, LLC. 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. #2 Prime Southern Yellow Pine Above Ground Actual: 1.5-in x 5.5-in x 12-ft #2 Prime Southern Yellow Pine Above Ground Actual: 1.5-in x 5.5-in x 12-ft Treated for protection against fungal decay, rot and termites Treatment meets AWPA (American Wood Protection As Select grade lumber may have a knothole every 4 and splits can not be longer than the board is wide. Modern science has developed preservative treatments that are odorless and colorless, and leave the wood paintable and dry to the touch. Pro Note: All copper-based wood preservative solutions will corrode unprotected iron and steel brackets and fasteners. The amount of chemical retained determines how resistant the lumber will be. Each charge sheet is reviewed to verify that all IQC requirements have been met and properly documented. MC-15 identifies lumber as having 15% or less moisture content. MCA can be used inside or out, above ground, in-ground, or in fresh-water contact residential areas. Green unseasoned lumber fresh from the mill is labeled either air-dried (AD) or surface-green (S-GRN). Recommended where a combination of economical construction and good strength is desired. Any lumber experts out there that can confirm KD HT is ok for a new deck? See Finish grades for face side; reverse side wane limitations are lower. Charges found non-conforming, either through plant IQC or third-party, are isolated for correction and the corrective actions are to be documented accordingly. two existing joists with this stamp are not dark in color like i think pressure treated wood should be I used to live to work. BOARD GRADES. Exciting stuffyou wont want to miss that! It has a unique broad grain cellular structure that allows for uniform and deep penetration of chemical preservatives. Suitable for economical use as sheathing or lathing. Then I worked to live. Treated wood will shrink as it dries and expand when wet and may acquire surface checks and cracks over time. Largest hole permitted is 1/16". See SPIB Special Product Rules for design values, Appearance is same as B&B Finish for thicknesses of 4" and less. This lumber has been non-destructively evaluated by an American Lumber Standard Committee approved machine. This Old House general contractor Tom Silva usually buys stacks of No. Standard grade lumber has more defects and knots and is #2 structural grade wood. 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. Plant inspections are required to be performed at least once per month, but may be increased due to production and/or performance. 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. The cores are removed by a specialized boring bit on the edge of the lumber, near the mid-length of the piece. The type of preservatives, retention level, and year it was treated are identified on the label. Selecting the correct type of treated wood for a project often depends on how and where it will be used. Box 10915 Pensacola, Fl. The grade of lumber is noted SS, #1, #2, #3, or STUD and the price reflects the quality. I grabbed an exerpt here and there and put it all together, for I was on a lot of different sites and suppliers. This information must include the charge number, treatment date, products treated, tally, cycle parameters and preservative solution strength for each charge. When pressure treated it is resistant to decay and termites. 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. It is a very strong and stiff softwood, and dense too. Pressure treated lumber comes in a variety of lengths, widths, and thicknesses and from different species of softwood. In preparation for treatment, like lumber products are grouped together onto moving trams and placed into a large cylinder for treatment of the charge. An economical roof decking which conforms to No. Once on the drip pad, the material will stay until it is dry enough to be moved into the plants treated inventory. Both DIYers and building professionals will like these garden and outdoor living ideas and plans. Pressure treated lumber is divided into different types based on the retention level or amount of preservative retained in the wood after treatment. Suitable for use as individual laminations for structural glued laminated timbers. 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). The two remaining designations, while not very useful to a homeowner, enable grading agencies to enforce their standards. Wood packaging material made of unprocessed raw wood is recognized as a pathway for the introduction and spread of pests. However, the tight grain also makes it less receptive to pressure treatment. Once penetration is verified, the outer section of the cores is removed to measure the amount of preservative retained. Office: (850) 434-2611 | Toll Free: (800) 995-7742 Has a better appearance than No.1 Dense Dimension Lumber because of additional restrictions on firm red heart, pith, knots and wane. He is passionately interested in home improvement, renovation and woodworking. endstream endobj 145 0 obj <>stream Water-repelling at a molecular level {Vzgil=ecQ*Q\o[lb[9X^gZyzzxzxxxyO`}@}(% m6@93 gx$?yV7`{x"?W@_} s Before a given charge can actually go into the plants treated inventory to be ready for shipment, it must first be evaluated for penetration. The lumber has the structural strength it is graded with but has fewer blemishes or knots, so a better appearance. There is no standard for appearance grading and select or premium could be #1 or #2 structural grade, it just increases the cost to the consumer for better wood. Walking into a lumberyard or store can be a daunting experience. #2 Prime Grade has a maximum hole size of ". Different types of treated lumber are used in many aspects of residential, commercial, and industrial construction where moisture or ground exposure may occur. It is stamped S-GRN for surface-green or AD for air-dried. wo*kS` 8r 5f)J `A%pWIu `lt=K!a4'(Xg^dU|$a!/,.-`0ir }dF\Nguyi12(8+DU Zty 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. The species and grade, however, affect the spacing between supports with #1 often rated for greater spans. 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. Recommended for uses where high strength, stiffness and good In most cases, the required depth of penetration is 2.5 or 85% of the available sapwood. spib no. 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. 1, No. Top-quality lumber 2x4 through 2x12 are either #2 Prime grade, #2 & Better/Appearance grade or #1 grade. So if you see HT on the stamp theres no real reason to doubt its treated but there is no way to know for sure on a brand new deck. No.2 Prime These factors, plus the moisture content at the time of milling, determine the grade assigned. WWPA offers a heat treatment certification program for mills to stamp qualifying lumber with the KD - HT mark. 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 American Wood Protection Association (AWPA) sets the standards for the retention level required for the different chemical preservative compositions for specific types of use. Pressure treated to a Ground Contact retention of either ACQ or CA Chemical preservative. Reasonably clear, but permits limited number of surface checks and small tight knots.
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