While the letter A represents the face grade, the number 1 represents the back grade. Grades are listed from highest to lowest. This guide will explain the different uses of plywood, as well as popular plywood sheet sizes and its rating and grade system, so that you can choose the best plywood for your … A and B plywoods will have far less of these. The letter grades typically come in pairs, where one letter refers to the "better" side, called the face, and the other letter to the backside, opposite the face. We’ve mentioned the grades plywood sheets can have a few times in this article. From the tree to works of art: A guide to understanding the hardwood plywood standard Plywood Grades . Grades. For example, you may notice that a panel is rated A1. The following face/back veneer grades are available from our warehouse facilities: B/BB: Single piece face and back veneer. The full text of the guide’s introduction, written by Ang Schramm, Director of Technical Services, appears below. It also explains how two grades are used to give the same or different quality finishes on either side of a sheet of material. ANSI Plywood Grading Standards & Descriptions FACE GRADE: Applications A Where excellent appearance is very important as in cabinets and furniture. Grading designation depends on the number of defects in a board. Repairs The many types of plywood can differ in materials, number of layers, rating and grade. Plywood is produced by layering thin sheets of wood. A. Click on the image to view our e-publication, designed to provide you with an understanding of popular hardwood plywood face veneer grades. Plywood is graded using a lettering system, this guide explains what quality of finish should be expected for each of the UK grades including photos. A and B grade are both very high quality, and so they will cost quite a bit more than lower grades. OSB is made from flakes or chips of wood. C D Provide sound surfaces but allow unlimited color variation. 1: This is the highest back grade possible for hardwood plywood. Wood Grades. Structural Plywood is suitable for structural applications as a Type A bond is used.Structural plywood comes in eight standard stress grades and five face veneer qualities. Here's a chart to help explain the grading system. Plywood is a necessity in many DIY and construction projects, but not every type of plywood works for every project. The plywood grade system uses letters A, B, C, and D, with A being the best and D being the lowest quality. Grade: Often abbreviated, 1 Common shown (e.g., 1COM) ... Plywood and oriented strand board (OSB) panels are manufactured (engineered) from various wood products and byproducts. Structural Plywood. Plywood’s standard grading system is A, B, C, and D. A-grade plywood is super-clean, with little or no blemishes. A lower grade can be perfectly acceptable, depending on placement and usage. 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