This lumber has been non-destructively evaluated by an American Lumber Standard Committee approved machine. SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. Many pieces included in this grade would qualify as No.2 except for a single limiting characteristic. Help a newbie identify treated wood? | LumberJocks Woodworking Forum Since 1960, lumber in North America has been graded at lumber mills by trained inspectors for structural strength and quality control. Mobile, AL. Quality control for treating should be done by an approved inspection agency. ? An excellent decking grade that can be used face side down for roof decking or face side up for floor decking. ehV$W'A Framing lumber, unlike money, does grow on trees, so theres always the chance it will have some natural defect, such as a large knot or a long split, that can reduce its overall strength. 2 lumber, which provides good strength at a reasonable price. Not all PT is rated for ground contact. Dressed to standard dry size prior to machine stress rating, and visually graded to assure that characteristics affecting strength are no more serious than the limiting characteristics for each grade. it is damn difficult to tell the differance on the new stuff. Superior product suitable for a wide range of uses including shelving, boxing, crating, and form lumber. WestWood Heat Treated Lumber Production Corporation vapor-stabilization technology is a patented wood heat treatment technology, utilizing a natural thermochemical reaction and steam at temperatures of 230-240 C (450 F) and exclusive of any chemical additives. Lumber may have one hole every 3 and any splits must not be bigger than the plank is wide. Ground contact means anything within 6-inches of the ground or in contact with the ground, foliage, grasses, or over water or wet areas. H\n0l/$x\$-"-! Too much. PDF AC2 Pressure Treated 8:16 - Midwest Manufacturing CCA is still used for industrial purposes today. Lumber that is 2 or less in thickness (24, 26, 5/4 decking, etc.) hbbd``b`i@i`}{" s@BHpE ^ !RHp@00 30 . endstream endobj startxref 0 %%EOF 162 0 obj <>stream This process is required through the plants Internal Quality Control (IQC) for all treated lumber products to be represented as meeting an applicable standard. The stapled on label will have w/CE to indicate with color enhancement, she is correct. Re-inspection of plant production is performed on a routine frequency by the agency. Recommended for most general construction uses where moderately high design values are required. Thats why every stick of lumber coming out of a sawmill is appraised by trained inspectors and given a grade stamp. SPIB is accredited through IAS and maintains ISO certification as both an inspection agency (ISO 17020) and a Laboratory (ISO 17025). Final Price $ 27 40. each. All rights reserved. Heat Treated vs Pressure Treated Wood - Canadian Home Inspection Services Pressure treated wood used for in-ground or critical use has a greater retention level than timber used for above or ground contact. r Lumber is stamped after it is milled and prior to being pressure treated. 6^,fniSgdc24.L7` b. I don't think HD carries it. Gloves protect against slivers and water-soluble chemicals; it is also advisable to thoroughly wash hands before eating or drinking. Penetration is verified on-site by the third-party inspector before sending the assay zones to the agency laboratory for retention analysis. #1 will have less knots and is typically spec'd for joists and rafters. 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. The ranking goes from Select Structural (highest strength, best appearance) to No. The cores are then dried and ground for the purpose of analyzing the dust by x-ray, titration or gas chromatography methods. Charges that are documented as conforming for penetration and retention by IQC results are subject to re-inspection by the agency to verify penetration and retention. Treated wood is made from strong evergreen species making it suitable for most building projects. It's distinctive wood grain appearance is great for decorative finishing. The pressure-treatment process Timber components, machined to their finished dimensions and at an appropriate moisture content, are impregnated with preservatives in large pressure vessels, where the combination of vacuum and high-pressure drives the preservative into the wood. It has a unique broad grain cellular structure that allows for uniform and deep penetration of chemical preservatives. {l@n7gM. Eugene has been a DIY enthusiast for most of his life and loves being creative while inspiring creativity in others. Premium and select classifications and the percentage of clear wood are appearance grades used by some mills and retailers. We've downsized and im already overimproved. Research shows that Southern Pine can be expected to last for many decades when properly treated and installed for its intended use. It can be used to span greater distances, an SPF SS 28 will reach 15-3. 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. I only use ground contact when the wood is actually touching the ground. All lumber must identify the association or agency accredited with overseeing the grading MLB is the Maritime Lumber Bureau. The plant is required to keep very specific information for each charge treated in its records system. maple, oak, birch, etc. See SPIB Special Product Rules for design values, Appearance is same as B&B Finish for thicknesses of 4" and less. Its moisture content of 19 percent or more makes it inexpensive, but it can move unpredictably as it shrinks and dries. 2 kd 19 ht 434 and spib ht 434 it looks like it's kiln dried and heat treated, but is it pressure treated to resist rot? An internet search says it has to do with less knots and quality, and that #1 is of higher quality. Copyright 2023 This Old House Ventures, LLC. The stamp identifies the wood species, grade, moisture content, inspection organization, and the mill it came from. 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. Pressure treated wood has many outdoor uses and even is used in some indoor locations, especially where moisture may be a concern. Some wood goes through a machine that incises small cuts into the surfaces for deeper chemical protection. 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. Application of the product requires pressure treatment by an approved treating process and preservative for marine usage. Wood Packaging Material (WPM). Basements and bathrooms are other areas where pressure treated wood can be used to frame interior walls to protect against moisture, mildew, and mold damage. In appearance grade, the planks are 66% clear wood. He is passionately interested in home improvement, renovation and woodworking. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Structurally, an SPF #3 28 can be used to span distances of 12-4. 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. 2 x 6 x 16' Prime Pressure Treated #2 Lumber *BUY IN BULK* AND SAVE It's usually stapled to the wood and isn't a requirement to be on the actual stamp. Pressure treated lumber has been treated with a chemical solution to protect it from insects, mold, mildew, and rot. Recommended for general construction uses. All Scaffold Plank design values are calculated using ASTM Standards D245 and D2555. Just to second what rjniles just said, the HD guy couldn't be more wrong (imagine that). The resulting hole will be filled with a treated wood plug to prevent easy access by insects or decay fungi. If the wood is #1, it is stamped #1. A final vacuum removes the excess preservative from the woods surface before the charge is removed from the cylinder and placed on the drip pad. Best appearance (compared to Standard) High-quality lumber Smaller and fewer knots Standard Grade: Use when a rustic appearance is desired. &_ePM&dWCh More knots than Premium grade In ancient times the Greeks used olive oil, the Romans tar, and others used pitch or lye. 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. MC-15 identifies lumber as having 15% or less moisture content. 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. The type identifies the amount of chemical retention which in turn determines how or where to best use the lumber. THIRD-PARTY AGENCY AUDIT and SAMPLING PROCEDURES. 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). Additionally, all cuts and drilled holes should be treated with preservatives to prevent damage to exposed untreated wood. Some lumber is also treated for fire protection and used throughout different areas of residential, commercial, and industrial construction. 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. MSR lumber is also required to meet certain visual grading requirements. #2 Prime grade southern yellow pine. Dimensional wood from all grades is pressure treated for different uses. Dimension stability improves 12-17 times compared to untreated wood Lumber Grades - ProWood lumber Pressure treated wood may require several weeks or even months to dry before it will absorb stain or paint. UC3B or UC4A are best for ground contact use. Knots must be well spaced and tight, so they wont fall out, and no larger than 2-3/4 in a 28. This website is presented by SFPA members, including: 2023 Southern Forest Products Association. Recommended for general construction uses. SYP Dimension Lumber Specifications | Canfor Within all grades, there are planks that will be freer of blemishes and knots and may be called premium. Wood is a sustainable product, making it . Check sources of supply for available grades and sizes. The clear appearance makes it a choice for trim, furniture, and cabinetry. 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. Pressure treated lumber is available in 1, 5/4, 2, 4, and 6 nominal thicknesses, and widths up to 12. MCA can be used inside or out, above ground, in-ground, or in fresh-water contact residential areas. 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. |fqqq~^;mffvf-5wV)64O?q30baveaj^-l*)+1$D>Vnm:OP0C#ddu1;r:8wwQKww3)IKLQ. End-glued, face-glued, and edge-glued Southern Pine in glued assemblies, including stress-rated grades of finger-jointed 2" Dimension Lumber. The grading is standardized and consistent for structural strength across the U.S. and Canada. In most cases, the required depth of penetration is 2.5 or 85% of the available sapwood. What's this lumber stamp mean? - Fine Homebuilding r Its appearance ranking requires it to be 75% free of knots or defects. Even if you are on the right track, you will still get run over if you just sit there. Good-quality sheathing, fencing, shelving and other general purpose uses. This approach is intended to consider the big picture trends as opposed to allowing otherwise isolated issues to severely affect plant performance status. ACQ is another environmentally safe preservative composed of soluble copper and either quaternary ammonium alkyl or substitute compounds. No 4x or 6x stuff that you might use for skids. #1 vs #2 Pressure Treated | DIY Home Improvement Forum All structural lumber used in the U.S. and Canada requires a stamp identifying it as grade SS, #1, #2, or #3.
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is spib no 2 prime pressure treated