![]() ![]() With the A & B grades, the number of repaired patches and voids on any given sheet will be low. Also, any gaps or voids along the edges of the panel are usually filled and smoothed off with wood putty. All large knots are replaced with football-shaped patches, which can be sanded and finished with the rest of the panel. The highest quality - and most expensive - types of softwood plywood are the A & B grades - which is perfect for shop projects like workbench plans. The number of defects in a panel - and the amount of work a wood mill has done to repair the defects - will determine the grade and the price of plywood. The primary difference between one grade and another is the number of knot holes and voids you'll find in the layers of veneer - defects which occur naturally in just about all type of softwood plywood. The grading system for softwood plywood is one of the easier puzzles to solve when it comes to buying lumber and wood project materials - thanks to the simple A-D letter system used to indicate the quality of the panel. It does not store any personal data.What Do the Letters Mean? Softwood Plywood Grades The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is used to store the user consent for the cookies in the category "Other. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. And did I mention you pay a huge premium for that milling service? So if at all possible, invest in a planer and a jointer as it saves you money and headaches in the long run.Ĭheck out this video for more basic lumber terminology and purchasing tips. To make matters worse, since wood constantly moves those S4S boards that were once nice and flat are usually anything but by the time their in your shopping cart. Pre-milled stock tends to hit that 3/4″ figure on the nose. ![]() By milling in my own shop I am certain I’ll end up with perfectly-flat boards and in many cases they’ll be thicker than 3/4″. Personally, I like the wood to be as rough as possible. If you want your material in a more rough state, you’ll need to check out your local hardwood dealer. ![]() If Home Depot is your only option and you want red oak, S4S is the only game in town. So what should you buy? Well it might depend on where you shop. This is the stuff you usually find for sale in the hardwood section of the big box stores like Home Depot and Lowes. S4S – The board has been surfaced on both faces (S2S) and received a rip on both edges, resulting in a board with two flat and parallel faces and two flat and parallel edges. S3S – The board has been surfaced S2S first, then one edge is ripped straight (also known as SLR1E or straight line ripped one edge). S2S – The board has been run through a planer producing two flat faces, but the edges are left rough. S2S= surfaced two sides, S3S = surfaced three sides and s4s = surfaced four sides. The SxS designation simply refers to how many sides have been pre-surfaced. Yet another stumbling block for the newbie. ![]() In your show dedicated to the lumber store, the nice lady at the counter mentioned some terms you didn’t cover. One terminology set you’ll run into refers to how much work has been done to a board prior to purchasing and that’s exactly what emailer Skee was confused about when he wrote me: But it’s a necessary evil and if you want to make informed purchases, you must have at least a rudimentary understanding of how wood is graded and sold. As this picture implies, lumber terminology can venture into boring territory. ![]()
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