ISO/FDIS 11671

FINAL DRAFT
International
Standard
ISO/TC 61/SC 11
Fibre reinforced plastics —
Secretariat: JISC
Telescopic ladder — Requirements
Voting begins on:
and test methods
2024-07-08
Plastiques renforcés de fibres de verre — Échelle télescopique —
Voting terminates on:
Exigences et méthodes d'essai
2024-09-02
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
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MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 61/SC 11
Fibre reinforced plastics —
Secretariat: JISC
Telescopic ladder — Requirements
Voting begins on:
and test methods
Plastiques renforcés de fibres de verre — Échelle télescopique —
Voting terminates on:
Exigences et méthodes d'essai
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2024
IN ADDITION TO THEIR EVALUATION AS
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BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
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INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
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TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
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TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
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Published in Switzerland Reference number
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Technical requirement . 4
4.1 Functional dimension .4
4.2 Total load .4
4.3 Materials .5
4.4 Protection .5
4.5 Surface finish .5
4.6 Hinges (turning points).5
4.7 Opening restraints .6
4.8 Rung/steps .6
4.9 Ladder feet.6
4.10 Top of leaning ladders .6
4.11 Locking of the rung/step sections .6
5 Testing methods . 6
5.1 Appearance check .6
5.2 Dimension check .6
5.3 Marking durability test .6
5.4 Mechanical performance test .7
5.4.1 General requirements .7
5.4.2 Drop test .7
5.4.3 Strength test of stiles .7
5.4.4 Bending test of stile .9
5.4.5 Lateral deflection test of the ladder .10
5.4.6 Bottom stile ends test .11
5.4.7 Vertical load on rung/steps . 12
5.4.8 Torsion test of rung/steps . 13
5.4.9 Pull out test of rung/step .14
5.4.10 Test of opening restraints and hinges of standing ladders . 15
5.4.11 Base slip test for leaning ladders . 15
5.4.12 Test of locking mechanism .17
5.4.13 Cyclic test of hinge joints .18
5.4.14 Feet pull test .19
5.4.15 Asymmetrical bending test .19
5.4.16 Durability test for standing ladders .21
5.4.17 Opening and closing cycle test .24
5.5 Aging test . .24
5.5.1 Principle .24
5.5.2 Preparation of the samples .24
5.5.3 Procedure .24
6 Marking, user instruction, packaging, transport and storage .25
6.1 Marking . 25
6.2 User instruction . 25
6.3 Packaging . 26
6.4 Transport . 26
6.5 Storage . 26
Annex A (informative) Inspection rules .27
Annex B (normative) Test sequence.28

iii
Bibliography .29

iv
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.
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the
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