Larger sizes conform to Dense Structural 72 Structural Lumber except for dense grain requirement. UC3B or UC4A are best for ground contact use. 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. This lumber has been non-destructively evaluated by an American Lumber Standard Committee approved machine. 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. Gloves protect against slivers and water-soluble chemicals; it is also advisable to thoroughly wash hands before eating or drinking. However, enough gets into the wood to provide a shell of protection that cant be matched with a brush. Pressure treated wood may require several weeks or even months to dry before it will absorb stain or paint. My electrical answers are based on 2017 NEC, you may have local amendments. In ancient times the Greeks used olive oil, the Romans tar, and others used pitch or lye. Those and other treatments are used for industrial purposes instead. x 8 ft. #2 Prime or Better Ground Contact Pressure-Treated Lumber is a . Largest hole permitted is 1/16". Its appearance ranking is 80% or better clear of defects. The amount of chemical retained determines how resistant the lumber will be. Southern yellow pine (SYP) is very strong and is common in the eastern U.S. A mixture of spruce, pine, and fir (SPF) dominate much of the northern U.S. and eastern and central Canada and isnt as strong as SYP. 2, and No. An internet search says it has to do with less knots and quality, and that #1 is of higher quality. Its appearance ranking requires it to be 75% free of knots or defects. The wood weathers better than untreated wood and wont gray or discolor as quickly. Ground contact means anything within 6-inches of the ground or in contact with the ground, foliage, grasses, or over water or wet areas. SPIB is accredited through IAS and maintains ISO certification as both an inspection agency (ISO 17020) and a Laboratory (ISO 17025). The tag identifies its proper use Above Ground, Ground Contact, etc. There are many other uses for pt lumber, including docks, boathouses, sheds, boardwalks, play structures, gazebos, and the list goes on. It's easy to work with. However, treated lumber may be kiln-dried or wet and will shrink, cup, and warp as it dries. Similar in appearance to No.2 Dimension Lumber. Grademarks | SPIB | Southern Pine Inspection Bureau it would be unsuitable unless it is a naturally resistant wood such as teak or redwood. 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. *Load duration factors greater than 1.6 shall not apply to structural members pressure-treated with water-borne . This service is intended to assist mills in supplying products that meet the standards for wood packaging Recommended where a combination of economical construction and good strength is desired. #2 Prime grade southern yellow pine. The species and grade, however, affect the spacing between supports with #1 often rated for greater spans. Ground contact level treatment (.15 pcf) has more than double the preservative of above ground level treated wood (.07 pcf) Lighter, more natural wood appearance for improved staining qualities. 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. 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. Select Structural (SS) is the highest grade based on strength and durability. Excellent for painting or natural finish where requirements are less exacting. All lumber must identify the association or agency accredited with overseeing the grading MLB is the Maritime Lumber Bureau. Overly dry wood often needs a pilot hole before fastening to prevent splitting. Any lumber experts out there that can confirm KD HT is ok for a new deck? 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. Reasonably clear, but permits limited number of surface checks and small tight knots. SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. Outside building projects and even some damp areas inside require wood that is resistant to moisture damage. check out this FAQ web site. The stamp identifies the wood species, grade, moisture content, inspection organization, and the mill it came from. Office: (850) 434-2611 | Toll Free: (800) 995-7742 Pressure treated lumber commonly is end-tagged with an information label before leaving the plant. Well-manufactured material evaluated by calibrated mechanical grading equipment which measures certain properties and sorts the lumber into various strength classifications. PDF AC2 Pressure Treated 8:16 - Midwest Manufacturing Standard grade lumber has more defects and knots and is #2 structural grade wood. Lumber that is 2 or less in thickness (24, 26, 5/4 decking, etc.) s 2 in. x 12 in. x 8 ft. #2 Prime or Better Ground Contact Pressure No.1 Prime No.2 Prime H ighqu al ty, m ed nc r sfo . %PDF-1.5 % 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. 1s and Selects, to boot. Green unseasoned lumber fresh from the mill is labeled either air-dried (AD) or surface-green (S-GRN). MCA is an environmentally friendly water-based preservative considered safe for humans and animals and is an alternative to CCA. This Old House general contractor Tom Silva usually buys stacks of No. We've downsized and im already overimproved. Dont know how PT Pine looks. Pressure Treated Lumber Grades, Types, and Uses Explained Treated wood will shrink as it dries and expand when wet and may acquire surface checks and cracks over time. A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. 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. From the cedar shakes, facia, and trim of a house to the sill plate and wooden foundations or supports, pressure treated wood is common in residential construction. 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. the Southern Pine Inspection Bureau (SPIB) Standard Grading Rules for Southern Pine Lumber. It must specifically be labeled ground contact. Walking into a lumberyard or store can be a daunting experience. Final Price $ 27 40. each. 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 . #1 is better. Email: cspsales@canfor.com. Most lumber in my area is listed as Prime or Premium depending on the box store and is stamped #2 or #2 & BTR. The retention level is measured in pounds of chemical per cubic foot of wood (pcf). 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. http://www.anthonyforest.com/pdfs/AWPA-Use-Category-System-U1-07.pdf. The most noticeable difference may be the price and scarcity of #1 grade lumber. D Fir-L or Doug Fir for Douglas fir or larch (L), H-F, Hem-fir, or Hem for hemlock-fir or hemlock. All four longitudinal faces must be free of pith and/or heartwood. It is not as strong as the other grades and is commonly used for where it wont be visible, and light framing purposes such as bracing, crates, and pallets. 43:Gs * endstream endobj 143 0 obj <>stream My HD carries some ground contact PT. In this article, well explain pressure treated (pt) lumber, the different types and uses, and how it is graded. Wood Packaging Material (WPM). Machine Stress Rated (MSR) lumber is evaluated by mechanical stress rating equipment. No 4x or 6x stuff that you might use for skids. The wood is 43% clear for appearance grading. If the wood is #1, it is stamped #1. May 26, 2016. #2 or #1 is the quality. As you look through our website, you will recognize the many different grades of lumber we stock. IMO when buying PT for above ground use, quality and appearance is what counts. Twenty cores are taken randomly throughout the charge to measure the depth of preservative penetration in each core. In most cases, the required depth of penetration is 2.5 or 85% of the available sapwood. Identifies the accredited agency or association that oversees grading accuracy, in this case the National Lumber Grades Authority. When pressure treated it is resistant to decay and termites. This specific set of data for each charge is called a charge report. The plant is required to keep very specific information for each charge treated in its records system. As I understand it, the grade refers to the number of knots in a given length. Suitable for economical use as sheathing or lathing. BOARD GRADES. 32524-0915 it also has several good links. The label will show w/CE which means with color enhancement. Recommended for uses where high strength, stiffness and good appearance are desired. In appearance grade, the planks are 66% clear wood. I do like to cover the tops of the joists and beams with ice and water shield. However, some KD-HT wood at your local lumber yard might have a tag on the end of the lumber that specifies PT. CCA is a mixture of chromium, copper, and arsenic that turns wood green. r This Old House general contractor Tom Silva usually buys stacks of No. The wood then is dried naturally or in a kiln to evaporate the water out, leaving the preservatives behind. Now I must drink to work. Application of the product requires pressure treatment by an approved treating process and preservative for marine usage. Recommended for moulding and millwork applications. Admits pieces below a No.3 grade which can be used without waste, or which contain less than 25% waste by cutting. It was widely used as a preservative from the mid-1930s to 2004. Select grade lumber may have a knothole every 4 and splits can not be longer than the board is wide. Pressure treated wood can also be stained or sealed to enhance its color and for added protection. It is used to build exterior stairs, for posts, sheathing, siding, porches, decking, and railings too. 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). Pressure treated lumber is available in 1, 5/4, 2, 4, and 6 nominal thicknesses, and widths up to 12. It is most commonly used for sheathing and applications where a fine finish is not required. HD and Lowe's only had lower grade. Exciting stuffyou wont want to miss that! Termawood vapor-stabilization technology is a patented wood heat treatment technology, utilizing a natural thermochemical reaction and steam at temperatures of 230-240 C without ANY chemical additives. Our next Blog will take the samples to the SPIB laboratory for analysis to determine if retention values are conforming. Lumber Grade Stamps - InterNACHI - International Association of Kiln-dried wood vs pressure treated: what is better? Pressure treated lumber comes in a variety of lengths, widths, and thicknesses and from different species of softwood. Our Services | Lumber Services | Treated wood products must meet very specific quality requirements to meet the building code. A specific indicator or a specific method is then used to reveal the depth and consistency of preservative penetration. While each charge is evaluated on its own merit, it is important to note that overall evaluation of plant performance is done over the most recent 20 samples. Pressure treatment of lumber has come a long way in the past 100 years. Got your hard hat and high-vis vest? The lumber is stronger than #1 or #2 and is ideal for all structural construction applications. Tel: 843-236-9399. Kiln-dried wood is crackproof but pressure-treated wood is not guaranteed against warping, shrinkage, or splitting. 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. #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 SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. x 12 in. hb```"/VI ealR]2L 7] u~m>^;+g=ll&Cv)!N&%5g~IK1 PDF Pressure-treated Southern Yellow Pine May have to look at Home Depot closer, since they carry #1 above ground. Within all grades, there are planks that will be freer of blemishes and knots and may be called premium. An indicator is used to identify the untreatable, heartwood sections of the 20-core sample (Sapwood is the outer portion of the log; heartwood is the innermost portion of the log and is rarely capable of accepting preservative). outdoor deck question. heat treated vs pressure treated wood #2 Prime Grade has a maximum hole size of ". The SPIB grade-mark is recognized as a sign of integrity within the industry. Recommended for general framing purposes. H\n0l/$x\$-"-! Southern Pines ease of treatability has made it the preferred species when pressure treatment with wood preservatives is required. However, they make an ideal solution for use in arid or dry locations. The clear appearance makes it a choice for trim, furniture, and cabinetry. |fqqq~^;mffvf-5wV)64O?q30baveaj^-l*)+1$D>Vnm:OP0C#ddu1;r:8wwQKww3)IKLQ. 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. One wide face and both adjacent narrow faces must be free of pith and/or heartwood. PDF Reference Design Values for Visually Graded Southern Pine Dimension Suitable for stud uses including use in load-bearing walls. The molecular changes in wood composition have a result of dimensional stabilization, protection against rot and wither, and as a result, expanded use opportunities. 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. I guess it is just a regional thing. 3 (lowest strength, not pretty). See Finish grades for face side; reverse side wane limitations are lower. t|]UE)@Whi`_@z>'}8/p}8c A joist made of Douglas fir, for instance, will cover a greater span than a hemlock joist of the same size and grade. The resulting hole will be filled with a treated wood plug to prevent easy access by insects or decay fungi. 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. Kiln-dried wood is lighter, easier to work with, and less likely to split. s Tell us how we're doing! Southern Pine's ease of treatability has made it the preferred species when pressure treatment with wood preservatives is required. Lumber must be stamped for strength by a trained inspector and identified with a legitimate stamp. Since 1960, lumber in North America has been graded at lumber mills by trained inspectors for structural strength and quality control. Water-repelling at a molecular level The scope of the ALSC review may also include physical inspection of treated wood products at the plant location to verify penetration and retention as a means of comparing against previous findings by the agency. 2 lumber, which provides good strength at a reasonable price. Fax: (850) 434-1290. Treated Wood | SPIB | Southern Pine Inspection Bureau Suitable for use as individual laminations for structural glued laminated timbers. (See Wood Code, below). The solution protects against insects, mold, mildew, fungus, and rot, and turns the wood a light brown hue. 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.