The table below identifies the types and their use based on the level of retention of preservatives. Those stacks also include some No. I grabbed an exerpt here and there and put it all together, for I was on a lot of different sites and suppliers. (See Wood Code, below). The grade mark can include "1W" or "2W" if visually graded to the wane requirements for No.1 or No.2 dimension lumber, respectively. 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. Myrtle Beach, SC. The current process is mostly computerized and mechanized using modern technology. It is used to build exterior stairs, for posts, sheathing, siding, porches, decking, and railings too. Thats why every stick of lumber coming out of a sawmill is appraised by trained inspectors and given a grade stamp. Maximum spans were calculated using design . Commonly used for joists, trusses, and other load-bearing applications. The accredited inspection agency, manufacturer, and plant are also commonly on the label but may be available in the bar code. CCA is still used for industrial purposes today. 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. It is used for all areas of residential construction from load bearing to trim. it would be unsuitable unless it is a naturally resistant wood such as teak or redwood. The type of preservatives, retention level, and year it was treated are identified on the label. {Vzgil=ecQ*Q\o[lb[9X^gZyzzxzxxxyO`}@}(% m6@93 gx$?yV7`{x"?W@_} s ehV$W'A 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. outdoor deck question. heat treated vs pressure treated wood Most lumber in my area is listed as Prime or Premium depending on the box store and is stamped #2 or #2 & BTR. Got the ledger #2 GC from the lumber yard. 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. All structural lumber used in the U.S. and Canada requires a stamp identifying it as grade SS, #1, #2, or #3. Top-quality lumber 2x4 through 2x12 are either #2 Prime grade, #2 & Better/Appearance grade or #1 grade. Generally, the charge is accepted if at least 80% of the cores (16 of 20) meet the minimum depth of penetration. The solution protects the wood from rot, insects, fungus, mold, and mildew, and also turns the wood a brown tone. 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. The preservatives provide protection against rot, insects, mold, and fungi, so the wood lasts longer. It is a very strong and stiff softwood, and dense too. Good, serviceable sheathing; usable for many economical applications without waste. Lumber structurally graded #1 or #1 & BTR (#1 and better) has a wood grain slope of 1 in 10. #1 will have less knots and is typically spec'd for joists and rafters. PDF AC2 Pressure Treated 8:16 - Midwest Manufacturing Recommended for most general construction uses where moderately high design values are required. It has nothing to do with the wood being pressure treated (PT) at all. (KD-HT means the wood was also heat treated to kill pests, a requirement for imported lumber.) 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. SPIB is a not-for-profit company that serves as the rules-writing agency for the Standard Grade Rules in Southern pine lumber. Lumber that is KD (kiln-dried) or S-DRY (surface-dry) has a moisture content that is lower, between 16% and 19%. #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 Just to second what rjniles just said, the HD guy couldn't be more wrong (imagine that). As the wood dries, the preservative is left behind to protect against insects, mold, mildew, fungal growth, and rot. 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. Tel: 843-236-9399. 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. The preservatives dont affect the load-bearing abilities, just provide protection against insect, mold, mildew, and rot damage. Wood is a sustainable product, making it . Selecting the correct type of treated wood for a project often depends on how and where it will be used. The grade-mark must contain the first four items listed below; the fifth item is optional. Lumber, posts, and ties range from 8 to 16 in length, although longer may be ordered. 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. Youll get less movement with kiln-dried (KD) or surface-dry (S-DRY) lumber, which has a moisture content between 16 and 19 percent. Dont know how PT Pine looks. PDF Strength Treatability Beauty - Teague Lumber 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. The grades are stamped prior to the wood being treated, so are the same for both treated and untreated. There are six different types of pressure treatment ratings, with different categories in some of them.