Denotes the woods species or a group of species with similar strengths. Both DIYers and building professionals will like these garden and outdoor living ideas and plans. Tags: None The Duke 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. Similar to MCA, the treated wood shouldnt be used in contact with food or animal feed. Timber Grades have similar characteristics to the corresponding grades of dimension lumber. The species and grade, however, affect the spacing between supports with #1 often rated for greater spans. Machine Evaluated Lumber is also required to meet certain visual requirements. Typically, the first step of a third-party agency audit involves a review of the plants records. Douglas fir has a tight close grain cell structure making it stronger and less prone to warping and twisting than pine. The SPIB Treated Wood Quality Audit Program provides a customized third-party quality control program to help Treated Wood producers meet industry-approved standards. Too much. No.2 Non-Dense No. Research shows that . For outdoor seating. The size, location, and the number of knots and other defects, and the slope of the wood grain affect the structural strength of lumber. 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. r s 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. %PZqI]Hx(or3'Z1Ld8&.u$eIJ{\,a(1I4;^?dB;|+abd` wX{M\f/=#S8NS6~#|oNQ5 Lj|< W-&A^N'*6|t79Ir8:]3Y -Q/A9h.BBvX
>A3s*E3_2pS\5a No.1 Prime No.2 Prime H ighqu al ty, m ed nc r sfo . 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. Wood treated with water-based preservatives for saltwater immersion has significantly higher retention levels than other types and categories. maple, oak, birch, etc. Trex gets awfully hot also and demands upkeep. Recommended where high strength, stiffness and good appearance are desired. The vacuumed cells more readily absorb the solution for better penetration. Some on this forum think that is a waste of time, but I think it extends the life of the lumber. Fax: (850) 434-1290. What is the Best Pressure Treated Wood for Decks? The wood then is dried naturally or in a kiln to evaporate the water out, leaving the preservatives behind. Luckily, a more budget-friendly option of pressure treated lumber grades is available. While most residential pressure treated lumber is deemed safe for use, dust and particles can still be harmful. s Structurally, an SPF #1 28 can be used to span distances of 14-11. Tel: 251-457-6872. 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. SPIB is able to assist manufacturers achieve and maintain the quality that their customers require by employing highly qualified instructors. Pressure treatment of lumber has come a long way in the past 100 years. Appearance is same as C Finish for thicknesses of 4" and less and widths 12" and less. The unique cellular structure of Southern Pine permits deep and uniform penetration of preservatives, rendering the wood useless as a food source for fungi, termites and micro-organisms. An easy way to identify the right framing lumber for your needs. High quality, limited in characteristics that affect strength or stiffness. MCA is an environmentally friendly water-based preservative considered safe for humans and animals and is an alternative to CCA. Outside building projects and even some damp areas inside require wood that is resistant to moisture damage. Tom saves money by ordering S-GRN wood when framing a new house, figuring that all the wood will air dry at the same pace. The two remaining designations, while not very useful to a homeowner, enable grading agencies to enforce their standards. This Old House general contractor Tom Silva usually buys stacks of No. it is damn difficult to tell the differance on the new stuff. Got the ledger #2 GC from the lumber yard. The unique cellular structure of Southern Pine permits deep and uniform penetration of preservatives, rendering the wood useless as a food source for fungi, termites and micro-organisms. Home Derpo person said that #2 is ground contact and stronger. Recommended for moulding and millwork applications. Treated posts or ties readily available at yards and stores are 35, 44, and 66; 88 is also available but may be a special order. It has nothing to do with the wood being pressure treated (PT) at all. Then I worked to drink. So, weve covered a lot of ground, but this is not the end, not by a long shot! 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. A high-pressure period is then undergone to push the preservative deep into the wood. Locations Products. Thats why every stick of lumber coming out of a sawmill is appraised by trained inspectors and given a grade stamp. The most noticeable difference may be the price and scarcity of #1 grade lumber. Records, trained personnel and an approved, properly equipped laboratory (either in-house or an approved external lab) are also required to complement the penetration and retention sampling requirements. Different types of treated lumber are used in many aspects of residential, commercial, and industrial construction where moisture or ground exposure may occur. They dont discolor the wood and protect against insects, molds, mildew, and fungi. Now I must drink to work. As I understand it, the grade refers to the number of knots in a given length. Tell us how were doing! However, they make an ideal solution for use in arid or dry locations. Recommended for construction where high strength, stiffness and good appearance are desired. #2: When appearance is of moderate concern, this grade will contain moderate size knots and can have a considerable amount of wane. 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. Mobile, AL. This defect is exacerbated in the presence of Spi-1 haplo-insufficiency (Spi1+/- SpiB-/-). Suitable for stud uses including use in load-bearing walls. Not all PT is rated for ground contact. (Kiln Dried After Treatment). '\ & Ls30+X61j\e(gV]]M(q9qs)loyM The treated wood is then taken to the yard to dry naturally or to the drying kilns before shipping to the retailer. Recommended for most general construction uses where moderately high design values are required. Construction grade commonly refers to #1 grade lumber. 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 . H\Ak0:b
@HZ=8&5FqjfvRut.I/55zb6+]5m&.wgUWm,ZM]nrO=gu${Tu?co2:4 SPIB is subject to continual review by IAS to ensure that the laboratory and agency records remain in compliance. Gloves protect against slivers and water-soluble chemicals; it is also advisable to thoroughly wash hands before eating or drinking. Pressure treatment is an affordable alternative to expensive naturally rot-resistant lumber. Just to second what rjniles just said, the HD guy couldn't be more wrong (imagine that). H|TnT1}W1yi= hEN4Kg8 bvlbh%gCXcX]NDRnFiUH>.Sl6Vi\(f^j+d}IT#h3Si [j6sG1Pbh`sX9W.+|FdqvJY/nm Sd@{D However, the tight grain also makes it less receptive to pressure treatment. CCA is a mixture of chromium, copper, and arsenic that turns wood green. Some mills may then identify it A, B, C, or D for appearance based on how clear or free it is of knots and blemishes. (See Wood Code, below). Those stacks also include some No. Tough to find decent boards. A joist made of Douglas fir, for instance, will cover a greater span than a hemlock joist of the same size and grade. 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. I am finding lots of info about how HT (heat treated lumber) is required for packaging, pallets etc to prevent the spread of some WDO across the world but can not find anything concrete on whether or not it is suitable for a deck. But using bigger joists of a cheaper species might save you money without loss of strength. Ground contact means anything within 6-inches of the ground or in contact with the ground, foliage, grasses, or over water or wet areas. Even if you are on the right track, you will still get run over if you just sit there. The preservatives provide protection against rot, insects, mold, and fungi, so the wood lasts longer. it also has several good links. Pressure treated lumber has been infused with preservatives to prevent rot and insect damage. MC-15 identifies lumber as having 15% or less moisture content. ), how wood is used also comes down to whether or not it's pressure treated. &_ePM&dWCh Douglas fir, fir, and hemlock dominate in the western U.S. and Canada, with Douglas fir ranking the strongest of the commonly milled and treated softwoods, while the fir and hemlock are slightly stronger than SPF. Dimension stability improves 12-17 times compared to untreated wood The wood should be at least 6-inches above the ground, have good air circulation and drainage, and the components can easily be replaced. Since 1960, lumber in North America has been graded at lumber mills by trained inspectors for structural strength and quality control. @_10ip CzHrGfnl~Frc>fkH 2X [ ^
endstream
endobj
140 0 obj
<>>>
endobj
141 0 obj
<>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/TrimBox[0.0 0.0 595.276 841.89]/Type/Page>>
endobj
142 0 obj
<>stream
Many pieces included in this grade would qualify as No.2 except for a single limiting characteristic. Advances in preservative treatments, environmental management and sustainable forestry practices make treated wood an ecologically sound building material. To qualify for a SPIB grade-marking license, a mill must have verified credentials in the manufacturing, seasoning, and grading of Southern Pine lumber. 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. Larger sizes conform to Dense Structural 65 Structural Lumber except for dense grain requirement. Machine Stress Rated (MSR) lumber is evaluated by mechanical stress rating equipment. It holds nails, screws, and other fasteners well, and is commonly used in residential, industrial, and commercial construction. Walking into a lumberyard or store can be a daunting experience. 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. 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. 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. Being 80% or more clear of defects, it is often used for cabinetry, furniture, and trim. Treated wood will shrink as it dries and expand when wet and may acquire surface checks and cracks over time. It has anti fungal properties along with a host of other positive features. It is stronger than #2 or #3 grade lumber. 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. 2 Dimension Lumber characteristics. It must specifically be labeled ground contact. MCA can be used inside or out, above ground, in-ground, or in fresh-water contact residential areas. Each charge sheet is reviewed to verify that all IQC requirements have been met and properly documented. All Scaffold Plank design values are calculated using ASTM Standards D245 and D2555. Construction grade is #1 and Standard is #2. As the wood dries, the preservative is left behind to protect against insects, mold, mildew, fungal growth, and rot. hbbd``b`i@i`}{" s@BHpE ^ !RHp@00 30 .
endstream
endobj
startxref
0
%%EOF
162 0 obj
<>stream
A walk down the lumber aisle or through a lumberyard will provide some understanding of the differences between #1 and #2 grade pressure treated lumber, or increase your confusion.