ISO 7567:2024
(Main)Bamboo structures — Glued laminated bamboo — Product specifications
Bamboo structures — Glued laminated bamboo — Product specifications
This document specifies requirements for the components of glued laminated bamboo members intended for structural use. Although currently most glued laminated bamboo is made from Phyllostachys edulis (Moso), this document also applies to other bamboo species (e.g. Guadua angustifolia, Dendrocalamus asper) if the performance required by this document can be shown to have been achieved. The basic requirements apply to structural members of all service classes; however, special precautions are necessary for service class 3, for example, the use of weather resistant adhesives (see 5.2). Annex C contains informative references for formaldehyde emission. The requirements will need to be supplemented to take into consideration any relevant special conditions as well as material and/or functional requirements.
Structures en bambou — Bambou lamellé-collé — Spécifications du produit
General Information
Standards Content (Sample)
International
Standard
ISO 7567
First edition
Bamboo structures — Glued
2024-10
laminated bamboo — Product
specifications
Structures en bambou — Bambou lamellé-collé — Spécifications
du produit
Reference number
© ISO 2024
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 3
5 Component requirements . 3
5.1 Bamboo strip requirements .3
5.1.1 Appearance .3
5.1.2 Maturity .3
5.1.3 Density .4
5.2 Adhesives .4
6 Performance requirements . . 4
6.1 Extension joints in laminations .4
6.1.1 Moisture content of bamboo strips .4
6.1.2 Extension joints geometry .4
6.1.3 Extension joint surface and adhesive application .4
6.2 Glue line integrity and strength .5
6.3 Property requirements .6
7 Manufacturing requirements . 6
7.1 General .6
7.2 Adhesives .6
7.3 Bamboo .6
8 Factory production internal quality control . 7
8.1 General .7
8.2 Glue line integrity .7
8.3 Gluing record .7
Annex A (normative) Shear performance test . 8
Annex B (informative) Personnel, facilities, manufacture, and quality control .11
Annex C (informative) Formaldehyde emission . 14
Annex D (informative) Examples of extension joints .15
Bibliography .16
iii
Foreword
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This document was prepared by Technical Committee ISO/TC 165, Timber structures.
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iv
Introduction
Glued laminated bamboo is produced by bonding together bamboo strips with their fibres parallel to each
other. A member with a rectangular or non-rectangular solid cross-section can be produced through this
manufacturing process.
The purpose of the requirements in this document is to provide minimum product specifications to achieve
adequate in-service performance of glued laminated bamboo building structures.
Figure 1 shows the typical manufacturing steps of glued laminated bamboo. Figure 1 a) shows a single
bamboo strip (also known as ‘lamina’) with rectangular cross section (w × t × l as shown in Figure 1 a)
s s s
which is typically lengthened by adding bamboo strips using non-structural joints (see 6.1). Figure 1 b)
shows a multiple layered glued laminated bamboo “board” (having width w and height h) component that
s
results from bonding together bamboo strips. The boards are subsequently assembled into glued laminated
bamboo components (having width b and height h) as shown in Figure 1 c) and Figures 1 d). The layup shown
in Figure 1 c) is the commonly used glued laminated bamboo arrangement. Other arrangements permitted
by this document are shown in Figures 1 d).
When producing multiple-board glued laminated bamboo, care shall be taken that the extension joints in
adjacent boards are staggered by at least the greater of 10w and 2h (see Figure 2).
s
a) Single bam- d) Other way to form
c) Several bamboo
boo strip, the a solid glued laminated
strips are pressed both
basic compo- b) Several bamboo
vertically and laterally
nent of glued bamboo strips
to form a solid glued
laminated are vertically
laminated bamboo
bamboo pressed
Key
1 extension joint
Figure 1 — Key manufacturing process for the products covered by this document
Figure 2 — Requirement for the staggering of extension joints in adjacent boards in the longitudinal
direction
v
vi
International Standard ISO 7567:2024(en)
Bamboo structures — Glued laminated bamboo — Product
specifications
1 Scope
This document specifies requirements for the components of glued laminated bamboo members intended
for structural use.
Although currently most glued laminated bamboo is made from Phyllostachys edulis (Moso), this document
also applies to other bamboo species (e.g. Guadua angustifolia, Dendrocalamus asper) if the performance
required by this document can be shown to have been achieved.
The basic requirements apply to structural members of all service classes; however, special precautions are
necessary for service class 3, for example, the use of weather resistant adhesives (see 5.2).
Annex C contains informative references for formaldehyde emission.
The requirements will need to be supplemented to take into consideration any relevant special conditions as
well as material and/or functional requirements.
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 12579, Timber structures — Glued laminated timber — Method of test for shear strength of glue lines
ISO 12580, Timber structures — Glued laminated timber — Methods of test for glue-line delamination
ISO 20152-1, Timber structures — Bond performance of adhesives — Part 1: Basic requirements
ISO 21625, Vocabulary related to bamboo and bamboo products
ISO 23478, Bamboo structures — Engineered bamboo products — Test methods for determination of physical
and mechanical properties
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 21625 and the following apply.
ISO and IEC maintain terminology 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
bamboo failure percentage
at the plane of shear failure, the ratio of failed bamboo material to the total failure surface expressed as a
percentage
3.2
total delamination
sum of delamination lengths of all glue lines around the perimeter of a tes
...
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