Grading Rules

Plywood classes explained Timber & Joinery We look at the different classes of plywood, class 1, 2 and 3, and explain the differences. Plywood undergoes strict testing on bonding and durability to prove that it is worthy of usage within the construction industry.  There are 2 standards, known as “harmonised standards”, that work together to determine which plywoods can be …

(BS) EN 314-2: 1993 (confirmed in 2013) Plywood – Bond quality – Requirements Orignal source https://apawood-europe.org/official-guidelines-3/individual-standards/en-314-2/ This part of the standard specifies the requirements for bonding classes of veneer plywood according to their end uses.  It lists three classes of bond quality. Bond Class 1: Dry conditions ‒ interior applications with no risk of wetting. This is equivalent to a moisture content in …

Russian Birch plywood is desired for its multiple plies of birch veneer that provide superior stability and strength. This panel is an exceptional performer when strength is desired, when either the face veneer or panel edges are exposed, or when a pleasing edge appearance is needed. Russian Birch plywood is typically produced with all birch veneers. Product Properties Russian Birch plywood …

Baltic Birch Plywood Technical Specifications Face Grade Description Grade “B” Single piece veneer of light and uniform colour. A few small pin knots and some brown streaks are allowed. Veneer of this grade is intended for natural finishes. Patches are not allowed. The majority of Grade B veneers are the equivalent of the American “white birch” faces. Grade “BB” Single piece …

Baltic Birch Plywood is graded with a face and back grade designation. The following face/back veneer grades are available from our warehouse facilities:B/BB: Whole piece face and back veneer. Face veneers are considered clear and free of defects witha light-uniform color. Back allows 3-6 color matched patches, which are oval in shape and egg sized.Inner cores are solid birch single …

BACK GRADES Sound Tight KnotsKnotholesRepaired KnotsSound Tight BurlsMineral/SapRough CutSplits or Joints1MAX 16 (UP TO 1/4″)NONOYESYES/YESTWO 8″ DIA. AREASSIX 1/8″ X 12″ REPAIRED2MAX 16 (8 UP TO 1/4″)ALL REPAIRED8 TO 1/2″YESYES/YESYESSIX 3/16″ X 12″ REPAIRED3MAX 16 (8 UP TO 1/4″)ALL 3/8″ TO 1″NO(1)YESYES/YESYES3/8″ X 1/4 LOP4YESUP TO 4″NOYESYES/YESYES1″ TO 1/4 LOP, 1/2″ TO 1/2 LOP, 1/4″ TO FULL LOP (1) May …

FACE GRADES: Red and White Oak Veneer: Rotary-Cut | Plain-Sliced | Quarter-Cut Pin Knots & Small Burls Combined AverageSound & Repaired KnotsRepaired KnotsMineral StreaksSapBlended Repaired Tapering Hairline SplitsAMAX 12 (4 UP TO 1/4″)NONOSLIGHT5%(1)TWO 1/16″ X 6″BMAX 24 (16 UP TO 1/4″)44 TO 1/8″FEW TO 8″UP TO 20%(2)FOUR 1/8″ X 8″CNO LIMIT84 TO 1/2″YES TO 12″YESFOUR 3/16″ X 8″ (1) No sap …

Plywood Grading There are many varieties of plywood on the market which are designed to meet different requirements and environmental specifications. Understanding the difference between these characteristics is key to ensuring you choose the best product for your project. This simple guide will help you determine which options are available to you and how to choose the right plywood for …

Grading Standards Baltic Birch Plywood is graded with a face and back grade designation. The following face/back veneer grades are available from our warehouse facilities: B/BB: Single piece face and back veneer. Face veneers are considered clear and free of defects with a light-uniform color. The back allows 3-6 color-matched patches, which are oval in shape and egg-sized. Inner cores are …

Detailed grading rules and full quality requirements are described in GOST 3916.1-96 Simplified Russian plywood grading rules in accordance with GOST 10.55-71 and GOST 3916.1-96 are presented below: 10.55-71Grade BGrade BBGrade CPGrade C3916.1-96Grade IGrade IIGrade IIIGrade IVPin knotsNot more than 3 per square meterAllowedAllowedAllowedSound intergrown knotsAllowed with diameter not more than 15 mmAllowed with diameter not more than 25Allowed with cracks …