ISO 27567:2009

INTERNATIONAL ISO
STANDARD 27567
First edition
2009-05-01

Laminated veneer lumber —
Measurement of dimensions and
shape — Method of test
Lamibois — Mesurage des dimensions et forme — Méthode d'essai




Reference number
ISO 27567:2009(E)
©
ISO 2009

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ISO 27567:2009(E)
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ISO 27567:2009(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
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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 27567 was prepared by Technical Committee ISO/TC 89, Wood-based panels, Subcommittee SC 3,
Plywood.

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INTERNATIONAL STANDARD ISO 27567:2009(E)

Laminated veneer lumber — Measurement of dimensions and
shape — Method of test
1 Scope
This International Standard describes the methods for determining the thickness, length, width, spring, bow,
twist and section squareness and cupping of test pieces of structural laminated veneer lumber (LVL), as
specified in ISO 18776.
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 2074, Plywood — Vocabulary
ISO 18776, Laminated veneer lumber (LVL) — Specifications
ISO 16979, Wood-based panels — Determination of moisture content
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2074 apply.
4 Moisture content
To meet the requirements of this International Standard, the test pieces shall have a moisture content of
(10 ± 4) % as determined in accordance with ISO 16979.
5 Apparatus
5.1 Determination of thickness.
5.1.1 Suitable linear measuring instrument, i.e. a screw micrometer.
5.1.2 Vernier calipers or dial gauge, having flat and parallel measuring surfaces with a contact area of
2 2
between 30 mm and 300 mm , reading to an accuracy of 0,1 mm.
5.2 Determination of length and width.
5.2.1 Suitable linear measuring instrument, reading to an accuracy of 0,5 mm.
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ISO 27567:2009(E)
5.3 Determination of spring.
5.3.1 Thumbtacks or drawing pins, at least two, or staple gun and staples.
5.3.2 Blocks, two, with flat surfaces, for which the difference in thickness does not exceed 0,1 mm.
NOTE Blocks of 30 mm × 15 mm × 20 mm have been found to be suitable.
5.3.3 Wire or cord, strong and thin.
5.3.4 Suitable linear measuring instrument, reading to an accuracy of 0,5 mm.
5.4 Determination of bow.
5.4.1 Surface, nominally flat, near horizontal, larger than the piece by at least 25 mm in each direction.
5.4.2 Suitable linear measuring instrument, reading to an accuracy of 0,5 mm.
5.4.3 Masses, totalling (85 ± 5) kg.
5.5 Determination of twist.
5.5.1 Surface, nominally flat, near horizontal, larger than the piece by at least 25 mm in each direction.
5.5.2 Suitable linear measuring instrument, reading to an accuracy of 0,5 mm.
5.6 Determination of squareness of section.
5.6.1 Square, with legs at least 25 mm longer than the width of the test piece to
...