For a better experience, please enable JavaScript in your browser before proceeding. They dont discolor the wood and protect against insects, molds, mildew, and fungi. The stamp identifies the wood species, grade, moisture content, inspection organization, and the mill it came from. Borates are sodium salts used in water-based pressure treatment solutions. The greater the content of preservatives denotes the type and use of the treated wood. Thats why every stick of lumber coming out of a sawmill is appraised by trained inspectors and given a grade stamp. The solution protects the wood from rot, insects, fungus, mold, and mildew, and also turns the wood a brown tone. It often links with the logo or symbol of the association that oversees the grading at that mill. Select Structural (SS) is the highest grade based on strength and durability. This double treated Ground Contact lumber must be used for applications where treated lumber is difficult to maintain, repair or replace. 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). 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. 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. #1 will have less knots and is typically spec'd for joists and rafters. Most likely it is a treated board, since most treated lumber is sold wet, some yards sell K.D.A.T. Plant inspections are required to be performed at least once per month, but may be increased due to production and/or performance. The quest for decent boards begins. So, weve covered a lot of ground, but this is not the end, not by a long shot! Listed spans are for wet-service conditions, pressure-treated Southern Pine floor/deck joists, MC > 19%. Excellent for painting or natural finish where requirements are less exacting. Recommended for general construction purposes where appearance is not a controlling factor. Knots must be well spaced and tight, so they wont fall out, and no larger than 2-3/4 in a 28. High quality, limited in characteristics that affect strength or stiffness. Application of the product requires pressure treatment by an approved treating process and preservative for marine usage. SPIB is accredited through IAS and maintains ISO certification as both an inspection agency (ISO 17020) and a Laboratory (ISO 17025). Each charge sheet is reviewed to verify that all IQC requirements have been met and properly documented. #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 The wood should be at least 6-inches above the ground, have good air circulation and drainage, and the components can easily be replaced. it is damn difficult to tell the differance on the new stuff. The best pressure treated wood for decks is Select, #1 or #2 grade wood. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Follow the link here to complete our Treated Division and Laboratory Customer Satisfaction Survey. 1s and Selects, to boot. Ok, now that weve got that covered, lets go to the treating plant! Pressure-Treated Southern Pine #2 or #1 is the quality. The lumber is inspected for knots, splits, and other defects that can weaken the woods structural strength. SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. The grade-mark must contain the first four items listed below; the fifth item is optional. endstream endobj 146 0 obj <>/Filter/FlateDecode/Height 49/Intent/RelativeColorimetric/Length 6519/Metadata 150 0 R/Name/X/Subtype/Image/Type/XObject/Width 174>>stream The grading is standardized and consistent for structural strength across the U.S. and Canada. It is used for all areas of residential construction from load bearing to trim. o>>QS-RSnwO4piq4Szh+jkS3NQn(:;^unn^}Q8ws{7sFS No 4x or 6x stuff that you might use for skids. 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. 2 Dimension Lumber characteristics. 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. 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. Bruce, I found more info on the heat treated wood. The HD guy is wrong. Dense Select Structural Select Structural. No.2 Prime When pressure treated it is resistant to decay and termites. 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. 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. In most cases, the required depth of penetration is 2.5 or 85% of the available sapwood. This specific set of data for each charge is called a charge report. MC-15 identifies lumber as having 15% or less moisture content. Suitable for use as individual laminations for structural glued laminated timbers. Box 10915 Pensacola, Fl. ), how wood is used also comes down to whether or not it's pressure treated. It should be noted, #2 & BTR does not mean #1. Within all grades, there are planks that will be freer of blemishes and knots and may be called premium. 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. Characteristics are limited to provide good strength and excellent serviceability. Both can be used for load-bearing purposes or other outdoor applications. Dimensional wood from all grades is pressure treated for different uses. 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. Here is another good link a guy posted over on Ins News Re-inspection of plant production is performed on a routine frequency by the agency. SPIB is accredited through IAS and maintains ISO certification as both an inspection agency (ISO 17020) and a Laboratory (ISO 17025). Home Derpo person said that #2 is ground contact and stronger. 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. Im building a deck and am getting conflicting info on the difference between #1 and #2 PT. Our next Blog will take the samples to the SPIB laboratory for analysis to determine if retention values are conforming. 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. However, they make an ideal solution for use in arid or dry locations. 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. Wood treated with water-based preservatives for saltwater immersion has significantly higher retention levels than other types and categories. Termawood is an unique technology that uses heat treatment for timber processing to significantly improve various characteristics of wood. The grade mark can include "1W" or "2W" if visually graded to the wane requirements for No.1 or No.2 dimension lumber, respectively. HWW&)@@vaU\P}qtyneG@@x7]Ia8QNoW%T"HH zB-rJ(TG?e)-3"kzvdkMwTXcfb`UML||d]/t@Q1~Q#|30LQA RG vy_rfazhfx NL+XEB7Hb%Y5?_9_h4}EZ^R Z}'a1+&z&j+m}b? z[TWL*baKq @NO{CHpXa2 PkHX%W!AH0aP1 bB z%Oev+Yh!UL$(MJ \N This service is intended to assist mills in supplying products that meet the standards for wood packaging 32524-0915 These values are modified using procedures shown in "Calculating Apparent Reliability of Wood Scaffold Planks," as published by the Journal on Structural Safety, 2 (1984) 47-57, and updated in 1993. Kiln-dried wood is crackproof but pressure-treated wood is not guaranteed against warping, shrinkage, or splitting. 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. Use UC3A pressure treated lumber for above ground exterior projects. 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. CCA Pressure-Treated Wood Wood-constructed homes, roof shakes and shingles, exterior decks, and children's play equipment that were built before 2004 and not made of cedar or redwood were likely constructed using wood that was pressure-treated with CCA, or chromated copper arsenate. Too much. 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 . 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. 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. This website is presented by SFPA members, including: 2023 Southern Forest Products Association. Well-manufactured material evaluated by calibrated mechanical grading equipment which measures certain properties and sorts the lumber into various strength classifications. The lumber is commonly used for all facets of structural construction, plus furniture, shelving, decking, railings, siding, post, and other purposes where its visible appeal can be appreciated. 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. {Vzgil=ecQ*Q\o[lb[9X^gZyzzxzxxxyO`}@}(% m6@93 gx$?yV7`{x"?W@_} s 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. s I will try to post-some new treated lumber being sold in the wood depot I go to referd to as BLUE if I am not mistaken. It is a very strong and stiff softwood, and dense too. 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. Review this helpful illustration showing the proper application of pressure-treated Southern Pine materials for a variety of projects around the home. 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. '\ & Ls30+X61j\e(gV]]M(q9qs)loyM The kd19 is the customers assurance that it was dried to the proper level before it left the plant. materials that may be exported. 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. 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. Lumber Grade Stamps - InterNACHI - International Association of Modern chemical baths and pressurization began in the early half of the 20th century. Wood packaging material made of unprocessed raw wood is recognized as a pathway for the introduction and spread of pests. Top-quality lumber 2x4 through 2x12 are either #2 Prime grade, #2 & Better/Appearance grade or #1 grade. #2 Prime grade has the strength of #2 grade lumber, but will look better, with fewer knots Premium Grade: Use when small knots are desired and appearance is very important. Longleaf, shortleaf, loblolly, and slash are some of the native southeastern pines that are classified as SYP. I only use ground contact when the wood is actually touching the ground. Machine Evaluated Lumber is also required to meet certain visual requirements. CCA is a mixture of chromium, copper, and arsenic that turns wood green. It may have poor drainage and air circulation, or like a sill plate, is difficult to repair or maintain. Working with pressure treated lumber is similar to working with untreated planks. It's easy to work with. SPIB is subject to continual review by ALSC to ensure that the laboratory and agency records remain in compliance. May 26, 2016. All Scaffold Plank design values are calculated using ASTM Standards D245 and D2555. 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. I did some research and found that they only staple the PT label to the end of the boards in many cases. Premium and select classifications and the percentage of clear wood are appearance grades used by some mills and retailers. Selecting the correct type of treated wood for a project often depends on how and where it will be used. Treatment with preservatives protects wood that is exposed to the elements, in contact with the ground or subjected to high humidity. Those stacks also include some No. Lumber, posts, and ties range from 8 to 16 in length, although longer may be ordered. Recommended for same purposes as Construction grade. 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. Tags: None The Duke 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. 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 . Get the latest This Old House news, trusted tips, tricks, and DIY Smarts projects from our expertsstraight to your inbox. Modern science has developed preservative treatments that are odorless and colorless, and leave the wood paintable and dry to the touch. Overall plant evaluation is done by means of separating and inspecting all of the different Production Categories to help identify very specific areas of concern, if any exist. The solution protects against insects, mold, mildew, fungus, and rot, and turns the wood a light brown hue. The type identifies the amount of chemical retention which in turn determines how or where to best use the lumber. A Production Category is defined as a given preservative, specie and retention combination. In this article, well explain pressure treated (pt) lumber, the different types and uses, and how it is graded. As I understand it, the grade refers to the number of knots in a given length. Identifies the accredited agency or association that oversees grading accuracy, in this case the National Lumber Grades Authority. 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. I have to call this lady back again at COX lumber, I had called her about something else and she was very knowledgable. Treating plants that produce material under a given ESR are required to be monitored by third-party agencies approved by the International Accreditation Service (IAS). 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. 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. 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. The stapled on label will have w/CE to indicate with color enhancement, she is correct. Its appearance ranking is 80% or better clear of defects. The Fora platform includes forum software by XenForo. Got the ledger #2 GC from the lumber yard. Maximum spans were calculated using design . Provides good appearance with some of, Maximum recommended support spacing is 24" on center (16" on center for Imported Southern Pine), High-quality product, recommended where smallest knots are, Slightly less restrictive than premium grade. 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. Lumber structurally graded #1 or #1 & BTR (#1 and better) has a wood grain slope of 1 in 10. Treated wood is made from strong evergreen species making it suitable for most building projects. All four longitudinal faces must be free of pith and/or heartwood. {l@n7gM. Good appearance, but graded primarily for strength and serviceability. KD HT lumber vs PT lumber for deck - InterNACHI Forum UC3B or UC4A are best for ground contact use. };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/;(.? Most lumber in my area is listed as Prime or Premium depending on the box store and is stamped #2 or #2 & BTR. Other than the features that depend on the type of tree the wood came from (i.e. The size, location, and the number of knots and other defects, and the slope of the wood grain affect the structural strength of lumber. The chemical treatment makes the wood resists insects, mold, mildew, and rot but not moisture-proof. Construction grade is #1 and Standard is #2. Using expensive wood that is naturally resistant may not fit the budget. r endstream endobj 145 0 obj <>stream The appearance doesnt affect the structural grade, it just is superficially more appealing. Treated Wood | SPIB | Southern Pine Inspection Bureau Spi-1 and Spi-B control the expression of the Grap2 gene in B cells Dont know how PT Pine looks. SPIB is a not-for-profit company that serves as the rules-writing agency for the Standard Grade Rules in Southern pine lumber. Wood Packaging Material (WPM). Lumber must be stamped for strength by a trained inspector and identified with a legitimate stamp. 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 appears as a new technology from Canada. 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. However, it shouldnt be used where it comes in contact with food or animal feed. The charge is considered conforming if each component meets the minimum required retention AND the total, combined minimum retention is met. Suitable for economical use as sheathing or lathing. Tell us how were doing! PDF Strength Treatability Beauty - Teague Lumber #2 Prime Grade has a maximum hole size of ". Pressure treated lumber is available in 1, 5/4, 2, 4, and 6 nominal thicknesses, and widths up to 12. 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. Quality control for treating should be done by an approved inspection agency. High utility value where appearance is. In the 19th-century railway companies used creosote to coat railway ties and timbers for bridges. Utility grade is #3 grade lumber and has even fewer restrictions regarding knots and defects compared to other grades. 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. Unfortunately, the water-soluble nature makes them susceptible to leaching out in rainy or wet areas, or near standing water. Raised floor homes look great and protect homeowners against risks from flooding and subsiding soils. I guess it is just a regional thing. Construction grade commonly refers to #1 grade lumber. It's distinctive wood grain appearance is great for decorative finishing. Pressure Treated Lumber Grades, Types, and Uses Explained Once penetration is verified, the outer section of the cores is removed to measure the amount of preservative retained. 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. SPIB performs these functions through the accreditation of the American Lumber Standard Committee (ALSC) as appointed by the Department of Commerce. Lumber may have one hole every 3 and any splits must not be bigger than the plank is wide. No. The SPIB Treated Wood Quality Audit Program provides a customized third-party quality control program to help Treated Wood producers meet industry-approved standards. *Load duration factors greater than 1.6 shall not apply to structural members pressure-treated with water-borne . Kiln-dried wood is lighter, easier to work with, and less likely to split. See Table 2 or SPIB Grading Rules for design values. For additional information on the proper handling and storage of pressure-treated Southern Pine materials,click here. The grade mark can include "1W" or "2W" if visually graded to the wane requirements for No.1 or No.2 dimension lumber, respectively. Pressure treated wood has many outdoor uses and even is used in some indoor locations, especially where moisture may be a concern. 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.