ISO 16894:2009
(Main)Wood-based panels — Oriented strand board (OSB) — Definitions, classification and specifications
Wood-based panels — Oriented strand board (OSB) — Definitions, classification and specifications
ISO 16894:2009 gives definitions, classifications and specifications for the manufacturing requirements of oriented strand board (OSB). The values given are used to classify OSB into one of four types, namely OSB type GP-REG, LB-REG, LB-MR or HLB-MR. The values are related to panel properties, but are not characteristic values to be used for design purposes.
Panneaux à base de bois — Panneaux de lamelles minces, longues et orientées (OSB) — Définitions, classification et spécifications
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 16894
First edition
2009-11-15
Wood-based panels — Oriented strand
board (OSB) — Definitions, classification
and specifications
Panneaux à base de bois — Panneaux de lamelles minces, longues et
orientées (OSB) — Définitions, classification et spécifications
Reference number
ISO 16894:2009(E)
©
ISO 2009
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ISO 16894:2009(E)
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ii © ISO 2009 – All rights reserved
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ISO 16894:2009(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.1
3 Terms, definitions and abbreviated terms.2
3.1 Terms and definitions .2
3.2 Abbreviated terms .3
4 Classification of the OSB.3
5 General requirements of all OSB types.3
6 Requirement values .4
7 Requirements for general purpose non-load-bearing OSB for interior fitments for use in
dry conditions (Type OSB GP-REG).4
8 Requirements for load-bearing OSB for use in dry conditions (Type OSB LB-REG) .4
9 Requirements for load-bearing OSB for use in humid conditions (Type OSB LB-MR) .5
9.1 General .5
9.2 Mechanical and swelling properties.5
9.3 Moisture resistance.6
10 Requirements for heavy duty load-bearing OSB for use in humid conditions (Type OSB
HLB-MR) .6
10.1 General .6
10.2 Mechanical and swelling properties.7
10.3 Moisture resistance.7
11 Marking.8
Annex A (normative) Calculation of the 5th percentile and 95th percentile values.9
Annex B (normative) Alternative moisture cycle for moisture resistance.11
Annex C (normative) Supplementary properties.12
Bibliography.13
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ISO 16894:2009(E)
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 through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 16894 was prepared by Technical Committee ISO/TC 89, Wood-based panels, Subcommittee SC 2,
Particle boards.
iv © ISO 2009 – All rights reserved
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INTERNATIONAL STANDARD ISO 16894:2009(E)
Wood-based panels — Oriented strand board (OSB) —
Definitions, classification and specifications
1 Scope
This International Standard gives definitions, classifications and specifications for the manufacturing
requirements of oriented strand board (OSB). The values given are used to classify OSB into one of four types,
namely OSB type GP-REG, LB-REG, LB-MR or HLB-MR. The values are related to panel properties, but are
not characteristic values to be used for design purposes.
NOTE 1 When OSB characteristic strength and stiffness values are required for design purposes, the properties can be
established based on testing in accordance with ISO 16572, ASTM D7033-07 or EN 789.
NOTE 2 For specific load-bearing applications, such as walls, roofs, floors, I joist webs, the load-bearing OSB can
meet the specific performance requirements for that intended application, in addition to the requirements of this
International Standard.
NOTE 3 Information on supplementary properties is given in Annex C.
NOTE 4 This International Standard is the reference for OSB classifications and specifications. Other regional or
national standards covering the performance of wood structural panels are given in the bibliography.
2 Normative references
The following referenced documents are indispensable for the application 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 9426, Wood-based panels — Determination of dimensions of panels
ISO 9427, Wood-based panels — Determination of density
ISO 12460-1, Wood-based panels — Determination of formaldehyde release — Part 1: Formaldehyde
emission by the 1-cubic-metre chamber method
ISO 16572, Timber structures — Wood-based panels — Test methods for structural properties
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 16983, Wood-based panels — Determination of swelling in thickness after immersion in water
ISO 16984, Wood-based panels — Determination of tensile strength perpendicular to the plane of the panel
ISO 16987, Wood-based panels — Determination of moisture resistance under cyclic test conditions
ISO 16998, Wood-based panels — Determination of moisture resistance — Boil test
ISO 17064:2004, Wood-based panels — Fibreboard, particleboard and oriented strand board (OSB) —
Vocabulary
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ISO 16894:2009(E)
3 Terms, definitions and abbreviated terms
For the purposes of this document, the terms and definitions given in ISO 17064 and the following apply.
3.1 Terms and definitions
3.1.1
oriented strand board
OSB
multi-layered board made from strands of wood of predetermined shape and thickness, together with a binder,
by the application of heat and pressure, with the strands in the external layers aligned and parallel to the
board length or width
NOTE Adapted from ISO 17064:2004, definition 2.3.
3.1.2
major axis
direction in the plane of the board, in which the bending properties have the higher values
3.1.3
minor axis
direction in the plane of the board at right angles to the major axis
3.1.4
general purpose
GP
non-load-bearing applications, interior fitments and furniture
3.1.5
load-bearing
LB
denotes a structural or designed application, such as building elements or use as a component in a structural
element such as the webs of I-joists
NOTE Examples of building elements are walls, roof and floor.
3.1.6
heavy duty load-bearing
HLB
special load-bearing grade of OSB with increased properties for more demanding applications
3.1.7
strand
manufactured wood element of a predetermined shape with an average length of more than 50 mm and
average thickness less than 2 mm
3.1.8
regular
REG
product suitable for applications in dry conditions
3.1.9
moisture resistant
MR
product suitable for applications involving humid conditions
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ISO 16894:2009(E)
3.2 Abbreviated terms
The following abbreviated terms apply.
regular REG for dry conditions only
moisture resistant MR for humid conditions
load bearing LB structural or load bearing
general purpose GP for applications not requiring the specific properties of furniture or
load-bearing grades
heavy duty load-bearing HLB for humid conditions
4 Classification of the OSB
Four types of board are classified and are distinguished as follows:
a) OSB GP-REG general purpose non-load-bearing OSB for interior fitments for use in dry conditions;
b) OSB LB-REG load-bearing OSB for use in dry conditions;
c) OSB LB-MR load-bearing OSB for use in humid conditions;
d) OSB HLB-MR heavy duty load-bearing OSB for use in humid conditions.
5 General requirements of all OSB types
All OSB types shall comply with the general requirements listed in Table 1 when dispatched from the
producing factory.
Table 1 — General requirements for all OSB types
No. Property Test method Requirements
1 Tolerances on nominal dimensions ISO 9426
⎯ thickness (sanded) within and between panels
± 0,3 mm
⎯ thickness (unsanded) within and between panels
± 0,8 mm
⎯ length and width
± 3,0 mm
2 Edge straightness tolerance ISO 9426 1,5 mm/m
3 Squareness tolerance ISO 9426 2,0 mm/m
4 Moisture content ISO 16979 2 % to 12 %
5 Tolerance on the mean density within a board ISO 9427 ± 15 %
ab
6 Formaldehyde release
3
⎯ emission value ISO 12460-1 0,124 or less mg/m
a
There are other tests which may be used to measure formaldehyde content or release (e.g. ISO 12460-3, ISO 12460-4 and
EN 120, see Bibliography). These may be used, provided a correlation is established with the reference method, ISO 12460-1.
b
OSB manufactured with phenolic and/or isocyanate resins have a history of low formaldehyde emission results, which meets the
requirements of all International Standards.
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ISO 16894:2009(E)
6 Requirement values
The values given in Tables 2 to 7, and determined by the relevant test methods as listed in Clauses 7 to 10,
shall be used for factory production control (FPC) purposes only and shall not be used in design calculations.
With the exception of the moisture resistance requirements in Tables 5 and 7 and swelling in thickness
requirements in Tables 2, 3, 4 and 6, the values given in Tables 2 to 7 are characterized by moisture content
in the material corresponding to a temperature of 20 °C and a relative humidity of the surrounding air of 65 %.
The values for the moisture resistance requirements in Tables 5 and 7 and swelling in thickness requirements
in Tables 2, 3, 4 and 6 are characterized by moisture content in the material before the treatment
corresponding to a temperature of 20 °C and a relative humidity of the surrounding air of 65 %.
The requirements in Tables 2 to 7 shall be met by the 5th percentile values (95th percentile values in the case
of swelling in thickness), based on the mean values for individual panels and calculated in accordance with
Annex A. In the case of swelling in thickness they shall be equal to or less than the values in the tables and in
the case of all other properties, they shall be equal to or greater than the values given in the tables.
7 Requirements for general purpose non-load-bearing OSB for interior fitments for
use in dry conditions (Type OSB GP-REG)
In addition to the requirements specified in Clause 5, this clause specifies the requirements for general
purpose OSB, and OSB for interior fitments (including furniture), for use in dry conditions. Therefore, OSB of
this type shall comply with the requirements given in Tables 1 and 2.
For definitions of values given in Table 2, see Clause 6.
Table 2 — General purpose non-load-bearing OSB for interior fitments (including furniture)
for use in dry conditions — Requirements for specified mechanical and swelling properties
Requirement
Board thickness range
Board type OSB GP-REG
Test method Unit
nominal
mm
Property 6 to 10 > 10 and < 18 18 to 25
Bending strength — major axis ISO 16978 MPa 20 18 16
Bending strength — minor axis ISO 16978 MPa 10 9 8
Modulus of elasticity in bending — major axis ISO 16978 MPa 2 500 2 500 2 500
Modulus of elasticity in bending — minor axis ISO 16978 MPa 1 200 1 200 1 200
Internal bond ISO 16984 MPa 0,30 0,28 0,26
Swelling in thickness — 24 h ISO 16983 % 25 25 25
8 Requirements for load-bearing OSB for use in dry conditions (Type OSB LB-REG)
In addition to the requirements specified in Clause 5, this clause specifies the requirements for load-bearing
OSB for use in dry conditions. Therefore, OSB of this type shall comply with the requirements given in
Tables 1 and 3.
For definitions of values given in Table 3, see Clause 6.
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ISO 16894:2009(E)
Table 3 — Load-bearing OSB for use in dry conditions —
Requirements for specified mechanical and swelling properties
Requirement
Board thickness range
Bo
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