ISO 22390 Timber structures — Laminated veneer lumber Test Machines

ISO 22390 Timber structures — Laminated veneer lumber Test Machines

Laminated veneer lumber (LVL) is being produced in many countries under different national standards and these products are being exported from one country to another. While the national standards have many similarities, there are also many areas of dissimilarity. Thus, there is a need for the development of this International Standard to establish consistency between these standards in order to ensure the suitability of LVL for structural end-use applications, regardless of country of manufacture or country of end use. It is intended for this to have value to industry, consumers, governments and distributors.

This International Standard 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 (bonding 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.

ASTM D6815-09, Standard Specification for Evaluation of Duration of Load and Creep Effects of Wood and Wood-Based Products

MAFF Notification No. 701, Japanese Agricultural Standard for Laminated Veneer Lumber

Veneers

Bonding quality

Dimensions and tolerances

Test methods

Edgewise bending strength

Flatwise bending strength

Tension strength parallel to the grain

Compression strength parallel to the grain

Shear strength (edge) related to edgewise bending

Shear strength (flat) related to flatwise bending

Compression strength perpendicular to the grain

Stiffness

Modulus of elasticity in edgewise bending

Modulus of elasticity in flatwise bending

Modulus of elasticity in tension parallel to the grain

Modulus of elasticity in compression parallel to the grain

Density

Moisture content

Species equivalency for connection properties

Creep and duration of load effects

ISO 10033-1, Laminated veneer lumber — Bonding quality — Part 1: Test methods

ISO 10033-2, Laminated veneer lumber — Bonding quality — Part 2: Requirements

ISO 13910, Structural timber — Characteristic values of strength-graded timber — Sampling, full-size testing and evaluation

ISO 16572, Timber structures — Wood-based panels — Test methods for structural properties

ISO 16979, Wood-based panels — Determination of moisture content

EN 408-03, Timber structures — Structural timber and glued laminated timber — Determination of some physical and mechanical properties

ASTM D143-09, Standard Test Methods for Small Clear Specimens of Timber

ASTM D198-09, Standard Test Methods of Static Tests of Lumber in Structural Sizes

ASTM D4761-05, Standard Test Methods for Mechanical Properties of Lumber and Wood-Base Structural Material

ASTM D5456-06, Standard Specification for Evaluation of Structural Composite Lumber Products