Grading Rules

https://apawood-europe.org/official-guidelines-3/individual-standards/en-636/ 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 and coated plywood, but it …

(BS) EN 314-2: 1993 (confirmed in 2013) https://apawood-europe.org/official-guidelines-3/individual-standards/en-314-2/ 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 …

poplar plywood classificationThe poplar plywood classification based on surfaces refers to standard UNI EN 635-1 and UNI EN 635-2. The classes are E, I, II, III and IV. Each surface of the panel is classified on its own. It is possible to have different combinations (for example, I/II, I/III, III/IV, ecc). thumb-class-ECLASSE E (formerly Class A under UNI 6471)Surface free …

Full Description Specifies requirements for the manufacture, grading, finishing and branding of plywood used specifically in formwork, with a maximum length of 3100mm and width of 1500mm, intended to meet off-form surface finish requirements of Classes2, 3, 4 and 5 as specified in AS3610.1. TECHNICAL NOTEFormwork Plywood for Class 2 and Class 3 Surface Finishesto AS 36102TABLE OF CONTENTSContentsIntroduction ……………………………………………………………………………………………………….3The …

Voluntary Product Standard PS 2-18Performance Standard for WoodStructural PanelsMarch 2019U.S. Department of CommerceWilbur L. Ross, Jr., SecretaryNational Institute of Standards and TechnologyWalter Copan, NIST Director and Undersecretary of Commerce forStandards and TechnologyiiCertain commercial entities, equipment, or materials may be identified in thisdocument in order to describe an experimental procedure or concept adequately.Such identification is not intended to imply recommendation or …

Voluntary Product Standard PS 1-19Structural PlywoodDecember 2019U.S. Department of CommerceWilbur L. Ross, Jr., SecretaryNational Institute of Standards and TechnologyWalter Copan, NIST Director and Undersecretary of Commerce forStandards and TechnologyCertain commercial entities, equipment, or materials may be identified in thisdocument in order to describe an experimental procedure or concept adequately.Such identification is not intended to imply recommendation or endorsement by theNational …

The strength of Australian timber is described in terms of “stress grades“. Stress Grading is a way of classifying timber, either visually or by mechanical means to indicate the basic properties to be used for structural design purposes. The stress grade is designated in a form such as “F14”, which indicates that the timber’s working stress in bending is approximately 14 MPA (Megapascals). The timber stress …

Timber Grading – Strength Do you know how strong your timber is? A timber’s strength in a construction context refers to the ability of a piece of timber to maintain stress (force) without ‘failure’. ‘Failure’ in this sense doesn’t necessarily mean breaking, but is more about bending strength, ie: how much downward force can be applied without the member deflecting …

(BS) EN 14279 : 2004  + A1: 2009 (confirmed 2014) Laminated Veneer Lumber (LVL) – Definitions, classification and specifications This standard gives definitions, a classification and specifies the requirements for LVL for general purposes or for use in construction in dry, humid or exterior conditions. It is referenced in the European harmonised standard for wood-based panel products EN 13986. LVL is …

(BS) EN 350:2016 Durability of wood and wood-based products – Testing and classification of the durability to biological agents of wood and wood-based materials Note: This new standard replaces EN 350-1 and EN 350-2 which have now been combined into one document. It gives guidance on methods for determining and classifying the durability of wood and wood-based materials against biological …