Pressure treated lumber comes in a variety of lengths, widths, and thicknesses and from different species of softwood. Select grade lumber may have a knothole every 4 and splits can not be longer than the board is wide. I do like to cover the tops of the joists and beams with ice and water shield. Pressure treated lumber has been treated with a chemical solution to protect it from insects, mold, mildew, and rot. 6^,fniSgdc24.L7` b. 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 grade-mark must contain the first four items listed below; the fifth item is optional. The molecular changes in wood composition result in unique features: '\ & Ls30+X61j\e(gV]]M(q9qs)loyM All rights reserved. The wood is 43% clear for appearance grading. #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. I guess it is just a regional thing. As a result, we have more grades available to our customers now than at any other time in the history of our company. 2 Dimension Lumber characteristics. Even if you are on the right track, you will still get run over if you just sit there. Largest hole permitted is 1/16". Pressure treated wood may require several weeks or even months to dry before it will absorb stain or paint. 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 This website is presented by SFPA members, including: 2023 Southern Forest Products Association. Like all lumber, the fewer knots, blemishes, or defects, the higher the grade. The wood weathers better than untreated wood and wont gray or discolor as quickly. This defect is exacerbated in the presence of Spi-1 haplo-insufficiency (Spi1+/- SpiB-/-). There is no structural premium grade, it is strictly a term for bright looking wood free of blemishes or knots. it would be unsuitable unless it is a naturally resistant wood such as teak or redwood. 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. 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. 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. Lumber stamped #2 grade is commonly used for framing, lintels, rafters, trusses, joists, beams, and fencing. it is damn difficult to tell the differance on the new stuff. Office: (850) 434-2611 | Toll Free: (800) 995-7742 All structural lumber used in the U.S. and Canada requires a stamp identifying it as grade SS, #1, #2, or #3. Select Structural (SS) is the highest grade based on strength and durability. s The process is similar for treating milled lumber, plywood, posts, or utility poles against rot and insects. But not all defects are obvious. Gloves protect against slivers and water-soluble chemicals; it is also advisable to thoroughly wash hands before eating or drinking. It was widely used as a preservative from the mid-1930s to 2004. Excellent for painting or natural finish where requirements are less exacting. Box 10915 Pensacola, Fl. A superior decking grade, suitable for plank floor where face serves as finish floor. Grademarks. It is the material of choice with both professionals and do-it-yourselfers for projects exposed to the rigors of weather, hot, humid climates, decay, and termites. As you look through our website, you will recognize the many different grades of lumber we stock. Suitable for use as individual laminations for structural glued laminated timbers. The tag identifies its proper use Above Ground, Ground Contact, etc. Box 10915 Pensacola, Fl. There are six different types of pressure treatment ratings, with different categories in some of them. 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. %\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+! In this article, well explain pressure treated (pt) lumber, the different types and uses, and how it is graded. Ok, now that weve got that covered, lets go to the treating plant! Good-quality sheathing, fencing, shelving and other general purpose uses. Other than the features that depend on the type of tree the wood came from (i.e. I hope you have a better understanding of what pressure treatment means and which grade and type is best for your project. The lumber has the structural strength it is graded with but has fewer blemishes or knots, so a better appearance. 3 (lowest strength, not pretty). The grading is standardized and consistent for structural strength across the U.S. and Canada. The grade of lumber is noted SS, #1, #2, #3, or STUD and the price reflects the quality. the Southern Pine Inspection Bureau (SPIB) Standard Grading Rules for Southern Pine Lumber. I don't think HD carries it. 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. It can be used to span greater distances, an SPF SS 28 will reach 15-3. Wood is a sustainable product, making it . Fax: (850) 434-1290. However, treated lumber may be kiln-dried or wet and will shrink, cup, and warp as it dries. check out this FAQ web site. Resistance to biological decay is 15-25 times higher then of untreated wood The size, location, and the number of knots and other defects, and the slope of the wood grain affect the structural strength of lumber. She said that some of the new PT looks so much like untreated they have to add a color enhancer to it. 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). In the 19th-century railway companies used creosote to coat railway ties and timbers for bridges. Youll get less movement with kiln-dried (KD) or surface-dry (S-DRY) lumber, which has a moisture content between 16 and 19 percent. };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 likely it is a treated board, since most treated lumber is sold wet, some yards sell K.D.A.T. SYP Lumber Sales. ehV$W'A http://www.anthonyforest.com/pdfs/AWPA-Use-Category-System-U1-07.pdf. 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. Lumber that is KD (kiln-dried) or S-DRY (surface-dry) has a moisture content that is lower, between 16% and 19%. Raised floor homes look great and protect homeowners against risks from flooding and subsiding soils. Treatment with preservatives protects wood that is exposed to the elements, in contact with the ground or subjected to high humidity. 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 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). Lumber may have one hole every 3 and any splits must not be bigger than the plank is wide. 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. Pressure treated wood for ground contact commonly has twice the chemical retention level as above ground rated lumber. The wood grain has a 1 in 8 slope, and there may be bark edge or wane visible. It's easy to work with. Standard grade lumber has more defects and knots and is #2 structural grade wood. The current process is mostly computerized and mechanized using modern technology. The Fora platform includes forum software by XenForo. Dimension stability improves 12-17 times compared to untreated wood Eugene has been a DIY enthusiast for most of his life and loves being creative while inspiring creativity in others. Characteristics are limited to provide good strength and excellent serviceability. Admits pieces below a No.3 grade which can be used without waste, or which contain less than 25% waste by cutting. 1s and Selects, to boot. The species and grade, however, affect the spacing between supports with #1 often rated for greater spans. 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. Bruce, I found more info on the heat treated wood. The International Code Council Evaluation Service (ICC-ES) similarly approves preservative systems through its Evaluation Service Reports (ESRs). A specific indicator or a specific method is then used to reveal the depth and consistency of preservative penetration. The stamp identifies the wood species, grade, moisture content, inspection organization, and the mill it came from. S;t HmM~[3`~Dl1Cj^x{}g.-GWlEu Yl[k4!42#>#13"J! 1pJ`w&Im0m/=BA!^/[xN XX=xEzGjB The look of the wood is only important if it is highly visible, such as deck boards, railings, and other visible structural members. Research shows that . No.2 Prime Treated wood is made from strong evergreen species making it suitable for most building projects. The appearance doesnt affect the structural grade, it just is superficially more appealing. 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. (KD-HT means the wood was also heat treated to kill pests, a requirement for imported lumber.) 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. Since 1960, lumber in North America has been graded at lumber mills by trained inspectors for structural strength and quality control. Luckily, a more budget-friendly option of pressure treated lumber grades is available. SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. 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. SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. 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. Structurally, an SPF #2 28 can be used to span distances of 14-11. This double treated Ground Contact lumber must be used for applications where treated lumber is difficult to maintain, repair or replace. This information must include the charge number, treatment date, products treated, tally, cycle parameters and preservative solution strength for each charge. 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. H\Ak0:b @HZ=8&5FqjfvRut.I/55zb6+]5m&.wgUWm,ZM]nrO=gu${Tu?co2:4 Inspection Practices for Treated Lumber Products. It needs to be treated every 2 to 3 years (depending on the environment) to protect it from moisture damage. WWPA offers a heat treatment certification program for mills to stamp qualifying lumber with the KD - HT mark. It has a unique broad grain cellular structure that allows for uniform and deep penetration of chemical preservatives. hVmO9 ^TUJk[ Pressure treatment is an affordable alternative to expensive naturally rot-resistant lumber. The grades are stamped prior to the wood being treated, so are the same for both treated and untreated. 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. #2 Prime Grade has a maximum hole size of ". 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. JavaScript is disabled. Im not going to struggle with huge bows and twisting.
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