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. The lumber has the structural strength it is graded with but has fewer blemishes or knots, so a better appearance. How to Read the Stamp - This Old House 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. the Southern Pine Inspection Bureau (SPIB) Standard Grading Rules for Southern Pine Lumber. How to Figure Out if Wood Has Been Pressure-Treated, and Why It Matters 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 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. SPIB is subject to continual review by IAS to ensure that the laboratory and agency records remain in compliance. 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. *Load duration factors greater than 1.6 shall not apply to structural members pressure-treated with water-borne . Recommended for uses where high strength, stiffness and good The look of the wood is only important if it is highly visible, such as deck boards, railings, and other visible structural members. Machine Evaluated Lumber is also required to meet certain visual requirements. The stamp identifies the wood species, grade, moisture content, inspection organization, and the mill it came from. Pressure treated to a Ground Contact retention of either ACQ or CA Chemical preservative. 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 It must specifically be labeled ground contact. The grade-mark must contain the first four items listed below; the fifth item is optional. Older growth wood is better but more expensive and difficult to find. vX63t$i"CIdxGFG(bpX@F2@2@pGG1Z@? Many pieces included in this grade would qualify as No.2 except for a single limiting characteristic. (Kiln Dried After Treatment). Water-repelling at a molecular level The wood is 43% clear for appearance grading. Treated wood is made from strong evergreen species making it suitable for most building projects. The amount of chemical retained determines how resistant the lumber will be. Pressure-treated wood can dry in about 1 month, whereas fresh wood provides an environment where fungi and bacteria produce rot and insects infest. Recommended for same purposes as Construction grade. Dimensional wood from all grades is pressure treated for different uses. Spi-1 and Spi-B control the expression of the Grap2 gene in B cells He is passionately interested in home improvement, renovation and woodworking. r r As I understand it, the grade refers to the number of knots in a given length. Today, pressure treated lumber for residential use is commonly pine, spruce, or fir that has been immersed in a water-based chemical bath of preservatives. Ultimately, our program provides an economically sound and standardized method of treatment, evaluation, labeling and certification for producers, specifiers and end users of pressure treated wood products. This grade is available in dimensions of 24, 26, 28, 210, and 212 and in lengths from 8 through 24. Here is a list and description of some of them. So if you see HT on the stamp theres no real reason to doubt its treated but there is no way to know for sure on a brand new deck. Myrtle Beach, SC. The type of preservatives, retention level, and year it was treated are identified on the label. SPIB is accredited through IAS and maintains ISO certification as both an inspection agency (ISO 17020) and a Laboratory (ISO 17025). ehV$W'A Locations Products. 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. There are different types of treatment and lumber grades for different uses. 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. In preparation for treatment, like lumber products are grouped together onto moving trams and placed into a large cylinder for treatment of the charge. Treated Wood | SPIB | Southern Pine Inspection Bureau Different chemicals have been used in the preservative bath, with changes being made to limit health risks to humans and animals. This service is intended to assist mills in supplying products that meet the standards for wood packaging Bruce, I found more info on the heat treated wood. Raised floor homes look great and protect homeowners against risks from flooding and subsiding soils. Abbreviations for framing-grade softwoods, from strongest to weakest, Doug Fir, D Fir- L: Douglas fir (L=western larch). Different types of treated lumber are used in many aspects of residential, commercial, and industrial construction where moisture or ground exposure may occur. Good, serviceable sheathing; usable for many economical applications without waste. JavaScript is disabled. Appearance is same as C Finish for thicknesses of 4" and less and widths 12" and less. The type identifies the amount of chemical retention which in turn determines how or where to best use the lumber. Working with pressure treated lumber is similar to working with untreated planks. 2 grade lumber, commonly referred to as "#2 & Btr" is used where high design values are required and high appearance in not a factor. Pressure treated wood has many outdoor uses and even is used in some indoor locations, especially where moisture may be a concern. An easy way to identify the right framing lumber for your needs. Raised floor homes look great and protect homeowners against risks from flooding and subsiding soils. Timber Grades have similar characteristics to the corresponding grades of dimension lumber. Used for such purposes as studding, blocking, plates, bracing and rafters. SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. Both DIYers and building professionals will like these garden and outdoor living ideas and plans. She said that some of the new PT looks so much like untreated they have to add a color enhancer to it. There are many other uses for pt lumber, including docks, boathouses, sheds, boardwalks, play structures, gazebos, and the list goes on. Tell us how we're doing! Twenty cores are taken randomly throughout the charge to measure the depth of preservative penetration in each core. Decking materials such as 26 and 5/46 frequently are of better-looking #1 and #2 lumber. What is the Best Pressure Treated Wood for Decks? CCA is still used for industrial purposes today. 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. Grade based on No.1 Dimension Lumber except wane and other characteristics that affect appearance are limited. 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. 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. Modern science has developed preservative treatments that are odorless and colorless, and leave the wood paintable and dry to the touch. 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. No 4x or 6x stuff that you might use for skids. s Another brand of heat treated wood that can be used for decking. Check sources of supply for available grades and sizes. Lumber that is imported or for export requires the designation KD-HT, which means it has been kiln-dried and heat-treated to kill insects. 2 lumber, which provides good strength at a reasonable price. hb```"/VI ealR]2L 7] u~m>^;+g=ll&Cv)!N&%5g~IK1 PDF Pressure-treated Southern Yellow Pine Grademarks | SPIB | Southern Pine Inspection Bureau Dimension stability improves 12-17 times compared to untreated wood See Table 2 or SPIB Grading Rules for design values. 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. Kiln-dried wood is crackproof but pressure-treated wood is not guaranteed against warping, shrinkage, or splitting. 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. Charges found non-conforming, either through plant IQC or third-party, are isolated for correction and the corrective actions are to be documented accordingly. #1 will have less knots and is typically spec'd for joists and rafters. It has nothing to do with the wood being pressure treated (PT) at all. The cores are then dried and ground for the purpose of analyzing the dust by x-ray, titration or gas chromatography methods. Admits pieces below a No.3 grade which can be used without waste, or which contain less than 25% waste by cutting. Stud is a fifth designation, meaning its good for a load-bearing wall. Final Price $ 27 40. each. The grades are stamped prior to the wood being treated, so are the same for both treated and untreated. Its appearance ranking is 80% or better clear of defects. The stapled on label will have w/CE to indicate with color enhancement, she is correct. Gives the trademark or number of the mill of origin. A Production Category is defined as a given preservative, specie and retention combination. The preservatives provide protection against rot, insects, mold, and fungi, so the wood lasts longer. MC-15 identifies lumber as having 15% or less moisture content. Here is another good link a guy posted over on Ins News 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 . Usable lengths suitable for bracing, blocking, bulkheading and other general utility purposes where strength and appearance are not a consideration. Some types of timber have natural abilities while others need a boost. Overly dry wood often needs a pilot hole before fastening to prevent splitting. Each charge sheet is reviewed to verify that all IQC requirements have been met and properly documented. BOARD GRADES. s The lumber is stronger than #1 or #2 and is ideal for all structural construction applications. hbbd``b`i@i`}{" s@BHpE ^ !RHp@00 30 . endstream endobj startxref 0 %%EOF 162 0 obj <>stream OK then thanks. The ranking goes from Select Structural (highest strength, best appearance) to No. Fax: (850) 434-1290. 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 . 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). For appearance, it must be 29% clear of defects. Its appearance ranking requires it to be 75% free of knots or defects. (KD-HT means the wood was also heat treated to kill pests, a requirement for imported lumber.) The retention level is measured in pounds of chemical per cubic foot of wood (pcf). Ground contact means anything within 6-inches of the ground or in contact with the ground, foliage, grasses, or over water or wet areas. x 12 in. spib no. Largest hole permitted is 1/16". Some lumber is also treated for fire protection and used throughout different areas of residential, commercial, and industrial construction. #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 then is dried naturally or in a kiln to evaporate the water out, leaving the preservatives behind. This information will then be combined with previous plant data to determine the plant performance status, as mentioned above. One wide face and both adjacent narrow faces must be free of pith and/or heartwood. 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 r s 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. Combination for B&B and C grades; satisfies requirements for. Reasonably clear, but permits limited number of surface checks and small tight knots. Those stacks also include some No. 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. ? WWPA offers a heat treatment certification program for mills to stamp qualifying lumber with the KD - HT mark. Good-quality sheathing, fencing, shelving and other general purpose uses. All rights reserved. Lumber that is 2 or less in thickness (24, 26, 5/4 decking, etc.) A very good product to, Highest recognized grade of Finish. 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. For outdoor seating. Recommended for uses where high strength, stiffness and good appearance are desired. 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. This lumber has been non-destructively evaluated by an American Lumber Standard Committee approved machine. Box 10915 Pensacola, Fl. 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. This defect is exacerbated in the presence of Spi-1 haplo-insufficiency (Spi1+/- SpiB-/-). Tell us how were doing! The tag identifies its proper use Above Ground, Ground Contact, etc. Pressure treated lumber commonly is end-tagged with an information label before leaving the plant. The plant is required to keep very specific information for each charge treated in its records system. Most likely it is a treated board, since most treated lumber is sold wet, some yards sell K.D.A.T. H\n0l/$x\$-"-! 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 wood weathers better than untreated wood and wont gray or discolor as quickly. SYP Lumber Sales. The treating process includes an initial vacuum to remove the excess moisture and air to aid in the absorption process. More knots than Premium grade 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. As the numbers go up, quality and price go down. S;t HmM~[3`~Dl1Cj^x{}g.-GWlEu Yl[k4!42#>#13"J! 1pJ`w&Im0m/=BA!^/[xN XX=xEzGjB Pressure treated lumber comes in a variety of lengths, widths, and thicknesses and from different species of softwood. Home Derpo person said that #2 is ground contact and stronger. PDF Strength Treatability Beauty - Teague Lumber Not all PT is rated for ground contact. Denotes the woods species or a group of species with similar strengths. Tags: None The Duke Unfortunately, the water-soluble nature makes them susceptible to leaching out in rainy or wet areas, or near standing water. Lumber must be stamped for strength by a trained inspector and identified with a legitimate stamp. This approach is intended to consider the big picture trends as opposed to allowing otherwise isolated issues to severely affect plant performance status. #1 #2 prime etc deals with the quality of the board. I do like to cover the tops of the joists and beams with ice and water shield. A study by the EPA in 2000 deemed it too hazardous for residential use, and in 2003 the lumber industry agreed to stop using it for residential purposes. It is stamped S-GRN for surface-green or AD for air-dried. 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. Penetration is verified on-site by the third-party inspector before sending the assay zones to the agency laboratory for retention analysis. No.2 Non-Dense No. Like all lumber, the fewer knots, blemishes, or defects, the higher the grade. '\ & Ls30+X61j\e(gV]]M(q9qs)loyM materials that may be exported. 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. Hi Raymond, it looks like this 2 in. The solution protects the wood from rot, insects, fungus, mold, and mildew, and also turns the wood a brown tone. http://www.anthonyforest.com/pdfs/AWPA-Use-Category-System-U1-07.pdf. The wood is commonly used for light construction or framing where it isnt visible, or for bracing, packaging, and shipping purposes. Tel: 251-457-6872. The vacuumed cells more readily absorb the solution for better penetration. This specific set of data for each charge is called a charge report. The main tree species used in the manufacture of pressure treated lumber are softwoods that regionally predominate in the mill area. Grades of Lumber - Culpeper Wood Preservers 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. All rights reserved. MSR Scaffold Plank is available 2"-thick only. As we can find no formal and simple description of all the different grades, we attempt to describe the grades that we currently stock so that you can decide what best fits your need and customer base. outdoor deck question. heat treated vs pressure treated wood Lumber that is KD (kiln-dried) or S-DRY (surface-dry) has a moisture content that is lower, between 16% and 19%. Utility grade is #3 grade lumber and has even fewer restrictions regarding knots and defects compared to other grades. 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. Knots must be well spaced and tight, so they wont fall out, and no larger than 2-3/4 in a 28. 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. However, some KD-HT wood at your local lumber yard might have a tag on the end of the lumber that specifies PT. The SPIB Treated Wood Quality Audit Program provides a customized third-party quality control program to help Treated Wood producers meet industry-approved standards. In this article, well explain pressure treated (pt) lumber, the different types and uses, and how it is graded. As a result, we have more grades available to our customers now than at any other time in the history of our company. Composite of No.3 strength and No.1 nailing edge characteristics for a better nailing surface. This website is presented by SFPA members, including: 2023 Southern Forest Products Association. D Fir-L or Doug Fir for Douglas fir or larch (L), H-F, Hem-fir, or Hem for hemlock-fir or hemlock. 6^,fniSgdc24.L7` b. Longleaf, shortleaf, loblolly, and slash are some of the native southeastern pines that are classified as SYP. 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. r Premium and select classifications and the percentage of clear wood are appearance grades used by some mills and retailers. Douglas fir has a tight close grain cell structure making it stronger and less prone to warping and twisting than pine. Superior product suitable for a wide range of uses including shelving, boxing, crating, and form lumber. H\Ak0:b @HZ=8&5FqjfvRut.I/55zb6+]5m&.wgUWm,ZM]nrO=gu${Tu?co2:4 It can be used to span greater distances, an SPF SS 28 will reach 15-3. So, weve covered a lot of ground, but this is not the end, not by a long shot! Application of the product requires pressure treatment by an approved treating process and preservative for. It is stronger than #2 or #3 grade lumber. About Contact Careers Locations Products, About Contact Careers Many DIYers and even some professionals arent familiar with the different types of pressure treated wood and their uses, or that the information is on the end-tag stapled to the board. Tel: 843-236-9399. it would be unsuitable unless it is a naturally resistant wood such as teak or redwood. These factors, plus the moisture content at the time of milling, determine the grade assigned. 2 in. x 12 in. x 8 ft. #2 Prime or Better Ground Contact Pressure This information must include the charge number, treatment date, products treated, tally, cycle parameters and preservative solution strength for each charge. Larger sizes conform to Dense Structural 72 Structural Lumber except for dense grain requirement. Powered by Discourse, best viewed with JavaScript enabled, www.strongtie.com/products/ptwoodfaqs.html, http://www.anthonyforest.com/pdfs/AWPA-Use-Category-System-U1-07.pdf. #2 Prime Grade has a maximum hole size of ". Both #2 grades have all the characteristics, including knot size, of regular #2 grades but are selected for 4 square edges (very light to no-wane or bark). Select Structural (SS) is the highest grade based on strength and durability. ACQ is another environmentally safe preservative composed of soluble copper and either quaternary ammonium alkyl or substitute compounds. Building codes, inspectors, builders, engineers, and other professionals use the grades to make sure structures are safe for use. 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. 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. THIRD-PARTY AGENCY AUDIT and SAMPLING PROCEDURES. 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. %\dbZ!1T09 F.#3s3+VdIr9f>LQOL7-1K)s+}OY'\awt_D FfhWnK8R5 @^L;@e\;7&8/O_PL;V@SqqZEy?9S=Z_{uh@fx:DSs=8! b+! 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 It is most commonly used for sheathing and applications where a fine finish is not required. Thats why every stick of lumber coming out of a sawmill is appraised by trained inspectors and given a grade stamp. #2 Prime grade southern yellow pine. Good appearance, but graded primarily for strength and serviceability. Im not going to struggle with huge bows and twisting. (@ 2=h/jO,,5rB G 5~7 ol}E|Cf6zg/I !^ endstream endobj 144 0 obj <>stream Recommended for general construction purposes where appearance is not a controlling factor. 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. A number that identifies the mill where the lumber was produced. However, the tight grain also makes it less receptive to pressure treatment. Identifies the accredited agency or association that oversees grading accuracy, in this case the National Lumber Grades Authority.
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