Grading Rules

(BS) EN 313-1: 1996 (confirmed in 2015) Plywood – Classification and Terminology – Classification This standard lists the three main classifications for plywood. General appearance According to their construction  veneer plywood, blockboard, laminboard or composites According to their form and shape Flat or moulded Principal characteristics According to their durability For use in dry, humid  or exterior conditions According to their …

(BS) EN 310: 1993 Wood-based panels: Determination of modulus of elasticity in bending and of bending strength This specifies a method of determining the apparent modulus of elasticity in flatwise bending and bending strength of wood-based panels of nominal thickness ≥ 3mm. The modulus of elasticity in bending and bending strength is determined by applying a load to the centre …

(BS) EN 300 : 2019 Oriented Strand Boards (OSB) – Definitions, classification and specifications This defines the terms, establishes a classification and specifies requirements for OSB.  The values appearing in this standard relate to the products properties but they are not characteristic values to be used in design calculations. See OSB Use Classes and durability issues   – this was …

(BS) EN 314-2: 1993 (confirmed in 2013) Plywood – Bond quality – Requirements 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 the plywood corresponding …

Plywood – Bond quality – Test methods This standard specifies methods for determining the bonding quality of veneer plywood, by shear testing. Before carrying out the shear tests the plywood samples are required to undergo a sequence of pre-treatments e.g. section 5.14 calls for immersion for 72 hours (±1) in boiling water followed by cooling in water at 20°C (±3°) …

(BS) EN 636:2012+A1:2015 Plywood – Specification This gives the requirements for plywood for general purpose use and for structural (load bearing) applications in dry, humid and exterior conditions. It also gives a classification based on bending properties. Amendment 1 : 2015 makes the following modifications to EN 636 : 2012 a) The scope now clarifies that the standard includes overlaid …

List of Individual Standards for Wood-based Panels The UK and EU follow the same principles for the standards listed below. For ease of use we have combined the titles. For the UK, the titles simply have ‘BS’ for (British Standard) added. When a standard has been reviewed and updated, that date is integrated into the standard title. When a standard …

(BS) EN 314-1: 2004 (confirmed 2014) Plywood – Bond quality – Test methods This standard specifies methods for determining the bonding quality of veneer plywood, by shear testing. Before carrying out the shear tests the plywood samples are required to undergo a sequence of pre-treatments e.g. section 5.14 calls for immersion for 72 hours (±1) in boiling water followed by …

Plywood Grades A Grade Veneer quality “A” has an appearance grade face with no visible defects. “A” grade veneer faces are suitable for clear finishing. Suitable to be used in applications where surface decorative appearance is a primary consideration. Species include Hoop Pine & Marine Ply. B Grade Veneer quality “B” has an appearance grade face. B grade veneer faces …

Birch-veneer standard quality classes: A QualityBeautiful, clean and white material. Applications: coating of doors, table tops and high-quality panels (IKEA class 1)AB QualityBeautiful, clean and even light material with some light “hair” allowed(erroneous beams) and closed needle branches. Areas of application: cabinet doors, various fronts and visible areas of furniture, edging, etc. (IKEA class 2)B QualityMore “hair” and needles and some color differences …