ISO 13609:2021

INTERNATIONAL ISO
STANDARD 13609
Second edition
2021-06
Wood-based panels — Plywood —
Blockboards and battenboards
Panneaux à base de bois — Contreplaqués — Panneaux lattés avec
lattes étroites et avec lattes larges
Reference number
©
ISO 2021
© ISO 2021
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ii © ISO 2021 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Material requirement . 2
4.1 Requirements for veneer. 2
4.1.1 Lignocellulosic materials . 2
4.1.2 Thickness . 2
4.1.3 Surface appearance . 2
4.1.4 Joint . 2
4.1.5 Direction. 2
4.2 Requirements for plywood . 2
4.2.1 Wood species or other lignocellulosic material . 2
4.2.2 Thickness . 3
4.2.3 Surface appearance . 3
4.2.4 Joint . 3
4.2.5 Direction. 3
4.3 Requirements for core strip. 3
4.3.1 Species . 3
4.3.2 Dimensions . 3
4.3.3 Quality of core strip . 3
4.3.4 Moisture content . 3
4.4 Requirements for core strip assembly . 4
4.4.1 Direction of core strip. 4
4.4.2 Jointing assembly in the length direction of core strip . 4
4.4.3 Jointing assembly in the width direction of core strip . 4
4.4.4 Thickness and tolerance . 4
4.5 Adhesives . 4
5 Panel lay-up and manufacturing requirements . 4
6 General requirements . 4
6.1 Dimensions and tolerances . 4
6.2 Classification by surface appearance . 4
6.3 Requirements of physical and mechanical properties. 5
6.4 Moisture content . 5
6.4.1 Mechanical properties . 5
7 Bonding quality . 5
8 Formaldehyde release requirements . 5
9 Other characteristics . 5
10 Conformances . 5
11 Marking, identification, and documentation . 6
Bibliography . 7
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 89, Wood-based panels, Subcommittee
SC 3, Plywood.
This second edition cancels and replaces the first edition (ISO 13609:2014), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— inclusion of a reference to ISO 2426-4;
— deleted reference to ISO/IEC Guide 65:1996.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved

INTERNATIONAL STANDARD ISO 13609:2021(E)
Wood-based panels — Plywood — Blockboards and
battenboards
1 Scope
This document establishes requirements for the specifications of blockboards and battenboards for
general use, in dry, tropic dry/humid, and high-humid/exterior conditions. It includes requirements
of materials, lay-up, physical and mechanical properties, bonding quality, formaldehyde release,
conformity verification, and marking.
The values listed in this document relate to product properties, but they are not characteristic values to
be used in design calculations.
2 Normative references
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 1954, Plywood — Tolerances on dimensions
ISO 2074, Plywood — Vocabulary
ISO 2426-2:2020, Plywood — Classification by surface appearance — Part 2: Hardwood
ISO 2426-3:2000, Plywood — Classification by surface appearance — Part 3: Softwood
ISO 2426-4:2018, Plywood — Classification by surface appearance — Part 4: Palm-plywood
ISO 9426, Wood-based panels — Determination of dimensions of panels
ISO 12460-1, Wood-based panels — Determination of formaldehyde release — Part 1: Formaldehyde
emission by the 1-cubic-metre chamber method
ISO 12460-3, Wood-based panels — Determination of formaldehyde release — Part 3: Gas analysis method
ISO 12460-4, Wood-based panels — Determination of formaldehyde release — Part 4: Desiccator method
ISO 12465:2007, Plywood — Specifications
ISO 12466-1, Plywood — Bonding quality — Part 1: Test methods
ISO 12466-2, Plywood — Bonding quality — Part 2: Requirements
ISO 16978, Wood-based panels — Determination of modulus of elasticity in bending and of bending strength
ISO 16979, Wood-based panels — Determination of moisture content
ISO 16999, Wood-based panels — Sampling and cutting of test pieces
ISO 18775, Veneers — Terms and definitions, determination of physical characteristics and tolerances
3 Terms and definitions
For the purposes of this document, the terms and definitions in ISO 2074, ISO 12465, and ISO 18775 and
the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
core strip
individual wood pieces with rectangular cross section which are assembled to form the solid core
4 Material requirement
4.1 Requirements for veneer
The following requirements apply to veneer at the time of pressing.
4.1.1 Lignocellulosic materials
Any wood species or other lignocellulosic material is permitted.
Veneers shall be identified according to the species, species group, or mechanical properties.
When veneers of different species are used to form a layer, these veneers shall be of similar mechanical
and physical properties.
4.1.2 Thickness
The thickness, t, of veneer shall be 0,55 mm ≤ t ≤ 6,0 mm. When veneers are used to cover a core, the
thickness of veneers adjacent to the core shall not be less than 1,5 mm.
4.1.3 Surface appearance
The surface
...