BS ISO 22390:2020 pdf free.Timber structures一Laminated veneer lumber一Structural properties.
BS ISO 22390 This document specifies requirements for establishing the characteristic properties of structural laminated veneer lumber [LVL], including 5th percentile strength values, stiffness characteristics and other performance characteristics, related to its end use as a structural product for dry use (service class 1). It is applicable to members used in flatwise or edgewise bending orientations.It does not cover the assessment of formaldehyde requirements, biological durability, fire performance or manufacturing, such as quality control and marking.The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 10033-1, Laminated Veneer Lumber (LVL)一Bonding quality一- Part 1: Test methods ISO 10033-2, Laminated Veneer Lumber (LVL)一Bonding quality一Part 2: Requirements ISO 13910, Timber structures一Strength graded timber一Test methods for structural properties ISO 16572, Timber structures一Wood-based panels一Test methods for structural properties ISO 16979, Wood-based panels一Determination of moisture content
EN 408, Timber structures一Structural timber and glued laminated timber一Determination of some physical and mechanical properties ASTM D143, Standard Test Methods for Small Clear Specimens of Timber ASTM D198, Standard Test Methods of Static Tests of Lumber in Structural Sizes ASTM D4761， Standard Test Methods for Mechanical Properties of Lumber and Wood-Base Structural Material ASTM D5456, Standard Specification for Evaluation of Structural Composite Lumber Products ASTM D6815, Standard Specification for Evaluation of Duration of Load and Creep Effects of Wood and Wood-Based Products.NOTIFICATION No MAFF 701 (Revised 2016),Japanese Agricultural Standard for Laminated Veneer Lumber.Characteristic strength values for edgewise and flatwise bending, tension parallel to the grain, compression parallel to the grain, edgewise and flatwise longitudinal shear and the mean compression perpendicular to grain strength shall be determined for laminated veneer lumber, as required by the product end-use application in accordance with 3.2 and the following requirements using the test methods in this clause.All test specimens shall be conditioned to an equilibrium moisture content resulting from a temperature of (20士2) °C and a relative humidity of(65土5] %. A test piece is considered to be conditioned when it attains constant mass. Constant mass is deemed to have been attained when the results of two successive weighings, carried out at intervals of not less than 6 h, do not differ by more than 1 %.BS ISO 22390 pdf download.