prEN 1288-3 rev

Glass in building - Determination of the bending strength of glass - Part 3: Test with specimen supported at two points (four-point bending) (ISO/DIS 1288-3:2014)

Verre dans la construction - Détermination de la résistance du verre à la flexion - Partie 3: Essais avec éprouvettes supportées en deux points (flexion quatre points)

Glas im Bauwesen - Bestimmung der Biegefestigkeit von Glas - Teil 3: Prüfung von Proben bei zweiseitiger Auflagerung (Vierschneiden-Verfahren) (ISO/DIS 1288-3:2014)

Diese Internationale Norm legt ein Verfahren zur Bestimmung der Biegefestigkeit von Flachglas im Bauwesen unter Einschluss der Glaskanten fest. Das festgelegte Verfahren kann auch nur zur Bestimmung der Biegefestigkeit der Glaskanten angewendet werden.
Die Grenzen der Anwendbarkeit dieses Teiles der Norm sind in  ISO 1288 1 beschrieben.
ISO 1288 1 sollte in Verbindung mit diesem Teil der Norm gelesen werden.

Verre dans la construction - Détermination de la résistance du verre à la flexion - Partie 3: Essais avec éprouvettes supportées en deux points (flexion quatre points) (ISO/DIS 1288-3:2014)

Steklo v gradbeništvu - Ugotavljanje upogibne trdnosti stekla - 3. del: Preskušanje dvakrat podprtega vzorca (štiritočkovna obremenitev) (ISO/DIS 1288-3:2014)

General Information

• Status: Not Published
• ICS: 81.040.20 - Glass in building
• Technical Committee: CEN/TC 129 - Glass in building
• Drafting Committee: CEN/TC 129 - Glass in building
• Current Stage: 4098 - Decision to abandon - Enquiry
• Completion Date: 11-Mar-2016
• Ref Project: oSIST prEN ISO 1288-3:2014 - Glass in building - Determination of the bending strength of glass - Part 3: Test with specimen supported at two points (four-point bending) (ISO/DIS 1288-3:2014)

Relations

• Revises: EN 1288-3:2000 - Glass in building - Determination of the bending strength of glass - Part 3: Test with specimen supported at two points (four point bending)
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2014
6WHNORYVWDYEDK8JRWDYOMDQMHXSRJLEQHWUGQRVWLVWHNODGHO3UHVNXãDQMH
GYDNUDWSRGSUWHJDY]RUFDãWLULWRþNRYQDREUHPHQLWHY,62',6
Glass in building - Determination of the bending strength of glass - Part 3: Test with
specimen supported at two points (four-point bending) (ISO/DIS 1288-3:2014)
Glas im Bauwesen - Bestimmung der Biegefestigkeit von Glas - Teil 3: Prüfung von
Proben bei zweiseitiger Auflagerung (Vierschneiden-Verfahren) (ISO/DIS 1288-3:2014)
Verre dans la construction - Détermination de la résistance du verre à la flexion - Partie
3: Essais avec éprouvettes supportées en deux points (flexion quatre points) (ISO/DIS
1288-3:2014)
Ta slovenski standard je istoveten z: prEN ISO 1288-3 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 1288-3
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 3:
Test with specimen supported at two points (four-point
bending)
Verre dans la construction — Détermination de la résistance du verre à la flexion —
Partie 3: Essais avec éprouvettes supportées en deux points (flexion quatre points)
ICS: 81.040.20
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for
Standardization (ISO), and processed under the ISO lead mode of collaboration
as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member
bodies for a parallel five month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments
received, will be submitted to a parallel two-month approval vote in ISO and
THIS DOCUMENT IS A DRAFT CIRCULATED
formal vote in CEN.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
To expedite distribution, this document is circulated as received from the
IN ADDITION TO THEIR EVALUATION AS
committee secretariat. ISO Central Secretariat work of editing and text
BEING ACCEPTABLE FOR INDUSTRIAL,
composition will be undertaken at publication stage.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 1288-3:2013(E)
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 SUPPORTING DOCUMENTATION. ISO 2013

ISO/DIS 1288-3:2013(E)
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as
permitted under the applicable laws of the user’s country, neither this ISO draft nor any extract
from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means,
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ii © ISO 2013 – All rights reserved

FDIS 1288-3
Contents
Foreword
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols (and abbreviated terms) . 2
5 Apparatus . 2
5.1 Testing machine . 2
5.2 Measuring instruments . 3
6 Sample . 3
6.1 Number of specimens . 3
6.2 Specimen dimensions . 3
6.3 Specimen condition and treatment . 3
6.4 Adhesive film . 4
7 Procedure . 4
7.1 Measuring width and thickness of each specimen . 4
7.2 Bending test . 5
8 Evaluation . 5
8.1 General. 5
8.2 Bending strength of the surface area, edges included . 5
8.3 Bending strength of the edges . 5
9 Test report . 6

FDIS 1288-3
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 1288-3 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 1288-3 Glass in building - Determination of the bending strength of glass" -
Part 3 : Test with specimen supported at two points (four point bending) 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 FDIS 1288-3
Glass in building — Determination of the bending strength of
glass — Part 3: Test with specimen supported at two points (four
point bending)
1 Scope
This International Standard specifies a method for determining the bending strength, including the effects of the
edges, of flat glass for use in building. The method specified can also be used to determine the bending strength
of the edges of glass separately.
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.
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.
3.2
effective bending stress
a weighted average of the tensile bending stresses, calculated by applying a factor to take into account
non-uniformity of the stress field
3.3
bending strength
the bending stress or effective bending stress which leads to breakage of the specimen
FDIS 1288-3
3.4
equivalent bending strength
the apparent bending strength of patterned glass, for which the irregularities in the thickness do not allow precise
calculation of the bending stress
4 Symbols (and abbreviated terms)
B Specimen width m
E Modulus of elasticity (Young's modulus) of the specimen Pa
NOTE for soda lime silicate glass (see ISO 16293-1) a value of 70 GPa is used.
F Maximum force N
max
NOTE Where the bending rollers are not firmly attached to the testing machine, but are
laid on the specimen, the force resulting from their weight is added to the maximum
measured force.
g Acceleration due to gravity m/s
h Specimen thickness m
k Dimensionless factor (see 6.2 of ISO 1288-1 for explanation)
L Specimen length m
L Distance between the centre lines of the supporting rollers m
s
L Distance between the centre lines of the bending rollers m
b
M Bending moment Nm
b
y Central deflection of the specimen relative to the supporting rollers m
Z Section modulus m
σ Bending stress in the surface area defined by the bending rollers Pa
b
σ Effective bending stress Pa
beff
σ Bending strength Pa
bB
σ Bending stress imposed by the self-weight of the specimen Pa
bG
ρ Density of the specimen kg/m
5 Apparatus
5.1 Testing machine
The bending test shall be carried out using a suitable bending testing machine, which shall incorporate the
following features:
a) The stressing of the specimen shall be capable of being applied from zero up to a maximum value in a manner
which minimizes shock and is stepless;
2 © ISO 2011 – All rights reserved

FDIS 1288-3
b) The stressing device shall be capable of the specified rate of stressing;
c) The testing machine shall incorporate a load measuring device with a limit of error of ± 2,0 % within the
measuring range;
d) The supporting rollers and the bending rollers (see figure 2) shall have a diameter of 50 mm and a length of
not less than 365 mm. All the rollers shall be free to rotate.
5.2 Measuring instruments
The following measuring instruments are required:
- a measuring instrument enabling the width of the specimen to be measured to the nearest 1 mm;
- a measuring instrument allowing the thickness of the specimen to be measured to the nearest 0,01 mm.
6 Sample
6.1 Number of specimens
The number of specimens to be tested shall be determined depending on the confidence limits required, especially
with regard to estimating the extremes of the st
...