oSIST prEN ISO 1288-5:2014

SLOVENSKI STANDARD
01-april-2014
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Glass in building - Determination of the bending strength of glass - Part 5: Coaxial double
-ring test on flat specimens with small test surface areas (ISO/DIS 1288-5:2014)
Glas im Bauwesen - Bestimmung der Biegefestigkeit von Glas - Teil 5: Doppelring-
Biegeversuch an plattenförmigen Proben mit kleinen Prüfflächen (ISO/DIS 1288-5:2014)
Verre dans la construction - Détermination de la résistance du verre à la flexion - Partie
5: Essais avec doubles anneaux concentriques sur éprouvettes planes, avec de petites
surfaces de sollicitation (ISO/DIS 1288-5:2014)
Ta slovenski standard je istoveten z: prEN ISO 1288-5 rev
ICS:
81.040.20 Steklo v gradbeništvu Glass in building
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/DIS 1288-5
ISO/TC 160/SC 2 Secretariat: ANSI
Voting begins on: Voting terminates on:
2014-01-09 2014-06-09
Glass in building — Determination of the bending strength
of glass —
Part 5:
Coaxial double-ring test on flat specimens with small test
surface areas
Verre dans la construction — Détermination de la résistance du verre à la flexion —
Partie 5: Essais avec doubles anneaux concentriques sur éprouvettes planes, avec de petites surfaces de
sollicitation
ICS: 81.040.20
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bodies for a parallel five month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments
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THEREFORE SUBJECT TO CHANGE AND MAY
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ISO/DIS 1288-5:2013(E)
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©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2013

ISO/DIS 1288-5:2013(E)
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FDIS 1288-5
Contents
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols (and abbreviated terms) . 2
5 Principle of test method . 2
6 Apparatus . 3
6.1 Testing machine . 3
6.2 Loading device . 3
6.3 Measuring instruments . 5
7 Sample . 5
7.1 Shape and dimensions of specimens . 5
7.2 Sampling and preparation of specimens . 7
7.3 Number of specimens . 7
8 Procedure . 7
8.1 Temperature . 7
8.2 Humidity . 7
8.3 Thickness measurement . 7
8.4 Base plate . 7
8.5 Positioning of specimen and loading ring . 8
8.6 Load Application . 8
8.7 Location of the origin . 8
8.8 Assessment of residual stresses . 8
9 Evaluation . 8
9.1 Limitation of the evaluation . 8
9.2 Calculation of bending strength . 9
10 Test report . 9
Bibliography . 10

FDIS 1288-5
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 3.
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 part of ISO 1288 may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 1288-5 was prepared by Technical Committee ISO/TC 160, Glass in building,
Subcommittee SC 2, Use considerations in conjunction with Technical Committee CEN/TC 129, Glass in building.
ISO 1288 consists of the following parts, under the general title Glass in building — Determination of the bending
strength of glass:
 Part 1: Fundamentals of testing glass
 Part 2: Coaxial double ring test on flat specimens with large test surface areas
 Part 3: Test with specimen supported at two points (four point bending)
 Part 4: Testing of channel shaped glass
 Part 5: Coaxial double ring test on flat specimens with small test surface areas
This Standard has been based on EN 1288-5 Glass in building - Determination of the bending strength of glass" -
Part 5 : Coaxial double ring test on flat specimens with small test surface areas prepared by Technical Committee
CEN/TC 129 "Glass in building"/WG8 "Mechanical Strength".
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,
Switzerland and the United Kingdom.

iv © ISO 2011 – All rights reserved

FDIS prEN/ISO 1288-5
Glass in building — Determination of the bending strength of
glass — Part 5: Coaxial double ring test on flat specimens with
small or medium test surface areas
1 Scope
This International Standard specifies a method for determining the comparative bending strength of glass for use in
buildings, excluding the effects of the edges.
NOTE See 5.1.4 in ISO 1288-1 for an explanation as to why this test method should only be used for comparing the
strength of types of glass, and not for assessing strength for design purposes.
The limitations of this part of this International Standard are described in ISO 1288-1.
ISO 1288-1 should be read in conjunction with this part of this International Standard.
This test method is not suitable for patterned glass.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 1288. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 1288 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 48, Rubber, vulcanised or thermoplastic - Determination of hardness (hardness between 10 IRHD and 100 IRHD)
ISO 1288-1, Glass in building - Determination of the bending strength of glass - Part 1: Fundamentals of testing glass
ISO 16293-1: Glass in building – Basic soda lime silicate glass products – Part 1: Definitions and general physical
and mechanical properties
3 Terms and definitions
For the purposes of this part of ISO 1288, the following terms and definitions apply.
3.1
bending stress
the tensile bending stress induced in the surface of a specimen
NOTE For testing purposes, the bending stress should be uniform over a specified part of the surface.
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