Glass in building - Heat strengthened soda lime silicate glass - Part 1: Definition and description

This European Standard specifies tolerances, flatness, edgework, fragmentation and physical and mechanical characteristics of monolithic flat heat strengthened soda lime silicate glass of nominal thicknesses from 3 mm to 12 mm for use in buildings.
Information on curved heat strengthened soda lime silicate glass is given in Annex A, but this product does not form part of this standard.
Other requirements, not specified in this standard, can apply to heat strengthened soda lime silicate glass which is incorporated into assemblies, e.g. laminated glass or insulating glass units, or undergo an additional treatment, e.g. coating. The additional requirements are specified in the appropriate product standard. Heat strengthened soda lime silicate glass, in this case, does not lose its mechanical or thermal characteristics.
This European Standard does not cover glass sandblasted after toughening.

Glas im Bauwesen - Teilvorgespanntes Kalknatronglas - Teil 1: Definition und Beschreibung

Diese Europäische Norm legt Toleranzen, Geradheit, Kantenbearbeitung, Bruchverhalten sowie physikalische und mechanische Eigenschaften von einscheibigem, flachem, teilvorgespanntem Glas mit Nenndicken von 3 mm bis 12 mm für den Gebrauch im Bauwesen fest.
An teilvorgespanntes Kalknatronglas können andere Anforderungen, die in dieser Norm nicht beschrieben sind, gestellt werden, wenn sie Bestandteil sind von Kombinationen wie z. B. Verbundglas, Isolierglas oder wenn sie weiterverarbeitet werden, z. B. beschichtet. Die zusätzlichen Anforderungen sind in den entsprechenden Normen der Fertigprodukte festgelegt. In diesem Fall wird teilvorgespanntes Kalknatronglas seine mechanischen und/oder thermischen Eigenschaften nicht verlieren.
Diese Europäische Norm behandelt kein im Anschluss an das Teilvorspannen sandgestrahltes Glas.

Verre dans la construction - Verre de silicate sodo-calcique durci thermiquement - Partie 1: Définition et description

La présente Norme européenne spécifie les tolérances, la planéité, la finition des chants, la fragmentation et les caractéristiques physiques et mécaniques du verre de silicate sodo-calcique plat monolithique durci thermiquement, d’une épaisseur nominale de 3 mm à 12 mm, destiné à être utilisé dans la construction.
D’autres exigences, non spécifiées dans la présente norme, sont susceptibles de s’appliquer au verre de silicate sodo-calcique durci thermiquement intégré dans des ensembles, par exemple des ensembles en verre feuilleté ou des vitrages isolants, ou de subir un traitement supplémentaire, par exemple un revêtement. Les exigences supplémentaires sont spécifiées dans la norme de produit correspondante. Dans ce cas, le verre de silicate sodo-calcique durci thermiquement ne perd pas ses caractéristiques mécaniques ou thermiques.
La présente Norme européenne ne traite pas du verre sablé après trempe.

Steklo v gradbeništvu - Delno kaljeno natrij-kalcijevo silikatno steklo - 1. del: Definicija in opis

Ta evropski standard določa toleranco, ploskost, obdelavo robov, drobljenje ter fizične in mehanske lastnosti monolitnega ploskega delno kaljenega natrij-kalcijevega silikatnega stekla nominalne debeline od 3 mm do 12 mm, ki se uporablja v gradbeništvu. Informacije o ukrivljenem delno kaljenem natrij-kalcijevem steklu so podane v dodatku A, vendar ta izdelek ni del tega standarda. Druge zahteve, ki niso določene v tem standardu, se lahko uporabljajo za delno kaljeno natrij-kalcijevo silikatno steklo, ki je vgrajeno v sestave, npr. lepljeno steklo ali izolacijsko steklo, ali pa ga je treba dodatno obdelati, npr. z nanosi. Dodatne zahteve so določene v ustreznem standardu za izdelek. Delno kaljeno natrij-kalcijevo silikatno steklo v tem primeru ne izgubi mehanskih ali toplotnih lastnosti.

General Information

Status
Withdrawn
Publication Date
28-Feb-2012
Withdrawal Date
30-May-2012
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
30-Nov-2011
Due Date
30-Nov-2012
Completion Date
30-Nov-2011

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Steklo v gradbeništvu - Delno kaljeno natrij-kalcijevo silikatno steklo - 1. del: Definicija in opisGlas im Bauwesen - Teilvorgespanntes Kalknatronglas - Teil 1: Definition und BeschreibungVerre dans la construction - Verre de silicate sodo-calcique durci thermiquement - Partie 1: Définition et descriptionGlass in building - Heat strengthened soda lime silicate glass - Part 1: Definition and description81.040.20Steklo v gradbeništvuGlass in buildingICS:Ta slovenski standard je istoveten z:EN 1863-1:2011SIST EN 1863-1:2012en,fr,de01-marec-2012SIST EN 1863-1:2012SLOVENSKI

STANDARDSIST EN 1863-1:20001DGRPHãþD
SIST EN 1863-1:2012
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1863-1
November 2011 ICS 81.040.20 Supersedes EN 1863-1:2000English Version

Glass in building - Heat strengthened soda lime silicate glass - Part 1: Definition and description

Verre dans la construction - Verre de silicate sodo-calcique durci thermiquement - Partie 1: Définition et description

Glas im Bauwesen - Teilvorgespanntes Kalknatronglas - Teil 1: Definition und Beschreibung This European Standard was approved by CEN on 25 September 2011.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1863-1:2011: ESIST EN 1863-1:2012

EN 1863-1:2011 (E) 2 Contents Page Foreword ..............................................................................................................................................................4Introduction .........................................................................................................................................................51 Scope ......................................................................................................................................................62 Normative references ............................................................................................................................63 Terms and definitions ...........................................................................................................................64 Glass products .......................................................................................................................................75 Fracture characteristics ........................................................................................................................86 Dimensions and tolerances ..................................................................................................................86.1 Nominal thickness and thickness tolerances .....................................................................................86.2 Width and length (sizes) .......................................................................................................................96.2.1 General ....................................................................................................................................................96.2.2 Maximum and minimum sizes ..............................................................................................................96.2.3 Tolerances and squareness .................................................................................................................96.2.4 Edge deformation produced by the vertical process ...................................................................... 106.3 Flatness ............................................................................................................................................... 106.3.1 General ................................................................................................................................................. 106.3.2 Measurement of overall bow ............................................................................................................. 136.3.3 Measurement of roller wave .............................................................................................................. 146.3.4 Measurement of edge lift (for horizontally heat strengthened glass only) ................................... 156.3.5 Measurement of local distortion (for vertically heat strengthened glass only) ........................... 166.3.6 Limitation on overall bow, roller waves and edge lift for horizontally heat strengthened glass ..................................................................................................................................................... 176.3.7 Limitation on overall bow and local distortion for vertically heat strengthened glass ............... 186.3.8 Other distortions ................................................................................................................................. 187 Edge and/or surface work, holes, notches and cut-outs ................................................................ 187.1 Warning ................................................................................................................................................ 187.2 Edge working of glass for toughening ............................................................................................. 187.3 Profiled edges ..................................................................................................................................... 197.4 Round holes ........................................................................................................................................ 197.4.1 General ................................................................................................................................................. 197.4.2 Diameter of holes ................................................................................................................................ 207.4.3 Limitations on position of holes ....................................................................................................... 207.4.4 Tolerances on hole diameters ........................................................................................................... 217.4.5 Tolerances on position of holes ........................................................................................................ 217.5 Holes/others ........................................................................................................................................ 227.6 Notches and cut-outs ......................................................................................................................... 227.7 Shaped panes ...................................................................................................................................... 238 Fragmentation test.............................................................................................................................. 238.1 General ................................................................................................................................................. 238.2 Dimensions and number of test specimens .................................................................................... 238.3 Test procedure .................................................................................................................................... 238.4 Assessment of fragmentation ........................................................................................................... 248.5 Evaluation of fragmentation .............................................................................................................. 269 Other physical characteristics .......................................................................................................... 269.1 Optical distortion ................................................................................................................................ 269.1.1 Heat strengthened soda lime silicate glass produced by vertical toughening ............................ 269.1.2 Heat strengthened soda lime silicate glass produced by horizontal toughening ....................... 27SIST EN 1863-1:2012

EN 1863-1:2011 (E) 3 9.2 Anisotropy (iridescence) .................................................................................................................... 279.3 Thermal durability ............................................................................................................................... 279.4 Mechanical strength ............................................................................................................................ 2710 Marking ................................................................................................................................................. 28Annex A (informative)

Alternative method for the measurement of roller wave distortion ...................... 29A.1 Apparatus ............................................................................................................................................. 29A.2 Method .................................................................................................................................................. 29A.3 Limitations ........................................................................................................................................... 30A.4 Alternative use of apparatus .............................................................................................................. 30 SIST EN 1863-1:2012

EN 1863-1:2011 (E) 4 Foreword This document (EN 1863-1:2011) has been prepared by Technical Committee CEN/TC 129 “Glass in building”, the secretariat of which is held by NBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2012, and conflicting national standards shall be withdrawn at the latest by May 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1863-1:2000. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. EN 1863 is divided into the following parts:  EN 1863-1, Glass in building — Heat strengthened soda lime silicate glass — Part 1: Definition and description;  EN 1863-2, Glass in building — Heat strengthened soda lime silicate glass — Part 2: Evaluation of conformity/Product standard. This European Standard differs from EN 1863-1:2000 as follows: a) some figures have been revised and some new figures have been added; b) new terms and definitions have been included in Clause 3, e.g. edge deformation (3.2), local distortion (3.8) and overall bow (3.9); c) further nominal thicknesses have been included in Table 1; d) Subclause 6.2.3 "Tolerances and squareness" has been completely revised; the squareness of rectangular glass panes is now expressed by the difference between its diagonals; e) Clauses 6 and 7 have been completely revised; f) the previous Clauses 9 and 10 have been revised and have been combined in a new Clause 9 "Other physical characteristics"; g) the normative Annex "Determination of U value" has been deleted; h) a new informative Annex dealing with an alternative method for the measurement of roller wave distortion has been added. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 1863-1:2012

EN 1863-1:2011 (E) 5 Introduction Heat strengthened soda lime silicate glass has a higher resistance to thermal stress and an enhanced mechanical strength when compared to annealed glass. NOTE CEN/TC 129/WG 8 is producing standards for the determination of the design strength of glass and is preparing a design method.

SIST EN 1863-1:2012

EN 1863-1:2011 (E) 6 1 Scope This European Standard specifies tolerances, flatness, edgework, fragmentation and physical and mechanical characteristics of monolithic flat heat strengthened soda lime silicate glass of nominal thicknesses from 3 mm to 12 mm for use in buildings. Other requirements, not specified in this standard, can apply to heat strengthened soda lime silicate glass which is incorporated into assemblies, e.g. laminated glass or insulating glass units, or undergo an additional treatment, e.g. coating. The additional requirements are specified in the appropriate product standard. Heat strengthened soda lime silicate glass, in this case, does not lose its mechanical or thermal characteristics. This European Standard does not cover glass sandblasted after toughening. 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. EN 572-1, Glass in building — Basic soda lime silicate glass products — Part 1: Definitions and general physical and mechanical properties EN 572-2, Glass in Building — Basic soda lime silicate glass products — Part 2: Float glass EN 572-4, Glass in building — Basic soda lime silicate glass products — Part 4: Drawn sheet glass EN 572-5, Glass in Building — Basic soda lime silicate glass products — Part 5: Patterned glass EN 572-8, Glass in building — Basic soda lime silicate glass products — Part 8: Supplied and final cut sizes EN 1096-1, Glass in building — Coated glass — Part 1: Definitions and classification 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) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 curved heat strengthened soda lime silicate glass heat strengthened soda lime silicate glass which has been deliberately given a specific profile during manufacture 3.2 edge deformation deformation of the edge because of the tong marks 3.3 edge lift (also referred to as edge dip) distortion produced in horizontal heat strengthened glass, at the leading and trailing edge of the plate NOTE This is a distortion produced by a reduction in surface flatness. SIST EN 1863-1:2012

EN 1863-1:2011 (E) 7 3.4 enamelled heat strengthened soda lime silicate glass heat strengthened soda lime silicate glass which has a ceramic frit fired into the surface during the heat strengthening process NOTE 1 After heat strengthening the ceramic frit becomes an integral part of the glass. NOTE 2 In the UK, this glass is also known as opaque heat strengthened soda lime silicate glass. NOTE 3 The application of the ceramic frit may be by a continuous process or discontinuous application, e.g. screen printing. The enamelled surface could be partially or wholly covered. 3.5 flat heat strengthened soda lime silicate glass heat strengthened soda lime silicate glass which has not been deliberately given a specific profile during manufacture 3.6 heat strengthened soda lime silicate glass glass within which a permanent surface compressive stress, additionally to the basic mechanical strength, has been induced by a controlled heating and cooling process in order to give it increased resistance to mechanical and thermal stress and prescribed fracture characteristics NOTE The thermal durability and mechanical strength are generated by the level of surface compression. These properties are not size dependent.

3.7 horizontal process process in which the glass is supported on horizontal rollers 3.8 local distortion local deformation of vertically heat strengthened glass underneath the tong marks 3.9 overall bow deformation of the whole pane of horizontally and vertically heat strengthened glass caused by the heating and cooling process 3.10 roller wave distortion distortion produced in horizontal heat strengthened glass as a result of the glass during heat strengthening process being in contact with the rollers NOTE This is a surface distortion produced by a reduction in surface flatness. 3.11 vertical process process in which the glass is suspended by tongs 4 Glass products Heat strengthened soda lime silicate glass is made from a monolithic glass generally corresponding to one of the following standards:  soda lime silicate glass according to EN 572-1;  float glass according to EN 572-2; SIST EN 1863-1:2012

EN 1863-1:2011 (E) 8  drawn sheet glass according to EN 572-4;  patterned glass according to EN 572-5;  supplied and final cut sizes according to EN 572-8;  coated glass according to EN 1096-1. Glass of nominal thicknesses between 3 mm and 12 mm other than those covered in the above standards are possible. 5 Fracture characteristics In the event of breakage, heat strengthened soda lime silicate glass fractures in a manner similar to annealed glass (see Clause 8). The fragmentation described in Clause 8 is undertaken on unrestrained test specimens. The fragmentation in service may not always correspond to that determined during the fragmentation test due to the imposition of other stresses, i.e. from fixing or from reprocessing (e.g. laminating). NOTE The fracture characteristics of glass are unaffected by temperatures between – 50 °C and + 100 °C.

6 Dimensions and tolerances

6.1 Nominal thickness and thickness tolerances The nominal thicknesses and thickness tolerances are those given in the relevant product standard (see Clause 4), some of which are reproduced in Table 1. Table 1 — Nominal thicknesses and thickness tolerances Dimensions in millimetres Nominal Thickness tolerances for glass type thickness d Float Patterned Drawn sheet New antique drawn sheet 3 ± 0,2 ± 0,5 ± 0,2 not manufactured 4 ± 0,2 ± 0,5 ± 0,2 ± 0,3 5 ± 0,2 ± 0,5 ± 0,3 not manufactured 6 ± 0,2 ± 0,5 ± 0,3 ± 0,3 8 ± 0,3 ± 0,8 ± 0,4 not manufactured 10 ± 0,3 ± 1,0 ± 0,5 not manufactured 12 ± 0,3 ± 1,5 ± 0,6 not manufactured

The thickness of a pane shall be determined as for the basic product. The measurement shall be taken at the centres of the 4 sides, and away from the area of any tong marks (see Figure 2), which may be present. SIST EN 1863-1:2012

EN 1863-1:2011 (E) 9 6.2 Width and length (sizes) 6.2.1 General When heat strengthened soda lime silicate glass dimensions are quoted for rectangular panes, the first dimension shall be the width, B, and the second dimension the length, H, as shown in Figure 1. It shall be made clear which dimension is the width, B, and which is the length, H, when related to its installed position.

Figure 1 — Examples of width, B, and length, H, relative to the pane shape NOTE For heat strengthened soda lime silicate glass manufactured from patterned glass, the direction of the pattern should be specified relative to one of the dimensions. 6.2.2 Maximum and minimum sizes For maximum and minimum sizes, the manufacturer should be consulted. 6.2.3 Tolerances and squareness The nominal dimensions for width and length being given, the finished pane shall not be larger than the nominal dimensions increased by the tolerance t, or smaller than the nominal dimensions reduced by the tolerance t. Limits are given in Table 2. The squareness of rectangular glass panes is expressed by the difference between its diagonals.

The difference between the two diagonal lengths of the pane of glass shall not be larger than the deviation limit v as specified in Table 3. Table 2 — Tolerances on width, B, and length, H Dimensions in millimetres Nominal dimension of side,

B or H Tolerance, t nominal glass thickness,

d ≤ 8 nominal glass thickness, d > 8 ≤ 2 000 ± 2,0 ± 3,0 2 000 < B or H ≤ 3 000 ± 3,0 ± 4,0 > 3 000 ± 4,0 ± 5,0

SIST EN 1863-1:2012

EN 1863-1:2011 (E) 10 Table 3 — Limit deviations for the difference between diagonals Dimensions in millimetres Limit deviation v on the difference between diagonals Nominal dimension B or H nominal glass thickness, d ≤ 8 nominal glass thickness,

d > 8 ≤ 2 000 ≤ 4 ≤ 6 2 000 < B or H ≤ 3 000 ≤ 6 ≤ 8 > 3 000 ≤ 8 ≤ 10

6.2.4 Edge deformation produced by the vertical process The tongs used to suspend the glass during heat strengthening result in surface depressions, known as tong marks (see Figure 2). The centres of the tong marks are situated up to a maximum of 20 mm in from the edge. A deformation of the edge less than 2 mm can be produced in the region of the tong mark and there may also be an area of optical distortion. These deformations are included in the tolerances in Table 2.

Key 1
deformation 2
up to 20 mm 3
tong mark 4

100 mm radius maximum area of optical distortion Figure 2 — Tong mark deformation 6.3 Flatness 6.3.1 General By the very nature of the heat strengthening process, it is not possible to obtain a product as flat as annealed glass. This difference in flatness depends on the type of glass, e.g. coated, patterned etc., glass dimensions, i.e. the nominal thickness, the dimensions and the ratio between the dimensions, and the heat strengthening process employed, i.e. vertical or horizontal. There are four kinds of distortion:  overall bow (see Figure 3);  roller wave distortion (for horizontally heat strengthened glass only) (see Figure 4); SIST EN 1863-1:2012

EN 1863-1:2011 (E) 11  edge lift (for horizontally heat strengthened glass only) (see Figure 5); NOTE 1 Overall bow, roller wave and edge lift can, in general, be accommodated by the framing system.  local distortion (for vertically heat strengthened glass only) (see Figure 6). NOTE 2 Local distortion needs to be allowed for within the glazing materials and the weather seals. For special requirements the manufacturers should be consulted.

Key 1
deformation for calculating overall bow 2
B, or H, or diagonal length 3

heat strengthened glass Figure 3 — Representation of overall bow SIST EN 1863-1:2012

EN 1863-1:2011 (E) 12
Key 1
heat strengthened glass Figure 4 — Representation of roller wave distortion
Key 1
straight edge 2
edge lift 3

heat strengthened glass Figure 5 — Representation of edge lift SIST EN 1863-1:2012

EN 1863-1:2011 (E) 13 Dimension in millimetres
Key 1
B, or H, the side on which the tong marks occur 2
local distortion 3

heat strengthened glass Figure 6 — Representation of local distortion 6.3.2 Measurement of overall bow The pane of glass shall be placed in a vertical position and supported on its longer side by two load bearing blocks at the quarter points (see Figure 7). The deformation shall be measured along the edges of the glass and along the diagonals, as the maximum distance between a straight metal ruler, or a stretched wire, and the concave surface of the glass (see Figure 3). The value for the bow is then expressed as the deformation, in millimetres, divided by the measured length of the edge of the glass, or diagonal, in metres, as appropriate. The measurement shall be carried out at room temperature. SIST EN 1863-1:2012

EN 1863-1:2011 (E) 14 Dimension in millimetres
Key 1
B or H 2
(B or H)/2 3
(B or H)/4 4
heat strengthened glass 5

support Figure 7 — Support conditions for the measurement of overall bow 6.3.3 Measurement of roller wave 6.3.3.1 General The roller wave is measured by means of a straight edge, or equivalent, being placed at right angles to the roller wave and bridging from peak to peak of the wave (see Figure 8). NOTE This section deals with measurement using a straight edge and feeler gauges. An alternative method is described in Annex A. 6.3.3.2 Apparatus A straight edge: — length of between 300 mm and 400 mm.

NOTE The actual length of straight edge required will depend upon the wavelength of the roller wave. Feeler gauges: — various thicknesses in units of 0,05 mm. SIST EN 1863-1:2012

EN 1863-1:2011 (E) 15 6.3.3.3 Method Place the straight edge so that it bridges across adjacent peaks. Insert the feeler gauge between the glass surface and the straight edge. Increase the thickness of the feeler gauges until they just fill the gap between glass surface and the straight edge. Record the thickness of feeler gauge(s) to an accuracy of 0,05 mm.

Repeat the measurement at several places over the glass surface. The measured roller wave distortion is the maximum value measured. The maximum values are given in Table 4. 6.3.3.4 Limitations The following limitations apply:  the roller wave can only be measured on panes with a dimension greater than 600 mm measured at right angles to the roller waves;  the roller wave cannot be measured in an exclusion area that is 150 mm from the edges of the pane. The apparatus should not be used in the area of these 150 mm;  panes with an overall bow shall be laid on a flat support. This will allow gravity to flatten out the overall bow and hence give a truer result for the roller wave. Dimension in millimetres

Key 1
straight edge 2
roller wave distortion 3

heat strengthened glass Figure 8 — Measurement of roller wave distortion 6.3.4 Measurement of edge lift (for horizontally heat strengthened glass only) The glass shall be placed on a flat support with the edge lift overhanging the edge of the support by between 50 mm and 100 mm.

The straight edge is placed on the peaks of the roller waves and the gap between the ruler and the glass measured using a feeler gauge (see Figure 9).

The maximum values for edge lift are given in Table 5. The values in Table 5 only apply to heat strengthened glass having edgework complying with Figures 11 to 14. For profiled edges or other types of edgework contact the manufacturer. SIST EN 1863-1:2012

EN 1863-1:2011 (E) 16 Dimensions in millimetres
Key 1
straight edge 2
edge lift 3
heat strengthened glass 4

flat support Figure 9 — Measurement of edge lift 6.3.5 Measurement of local distortion (for vertically heat strengthened glass only) Local distortion can occur over relatively short distances on the edge of the vertically heat strengthened glass that contains the tong marks (see Figure 2). Local distortion shall be measured over a limited length of 300 mm by using a straight ruler, or a stretched wire, parallel to the edge at a distance of 25 mm from the edge of the glass (see Figure 10). Local distortion is expressed as millimetres/300 mm length. For patterned glass, local distortion shall be determined by using a straight ruler resting on the high points of the pattern and measuring to a high point of the pattern. SIST EN 1863-1:2012

EN 1863-1:2011 (E) 17 Dimension in millimetres
Key 1
straight edge 2
local distortion 3

heat strengthened glass Figure 10 — Measurement of local distortion 6.3.6 Limitation on overall bow, roller waves and edge lift for horizontally heat strengthened glass The maximum allowable values for the overall bow, when measured according to 6.3.2, for roller waves, when measured according to 6.3.3 and for edge lift, when measured according to 6.3.4 are given in Tables 4 and 5. These values only apply to heat strengthened glass without holes and/or notches and/or cut-outs. Table 4 — Maximum values of overall bow and roller wave distortion for horizontally heat strengthened glass

Glass Type Maximum value for distortion Overall bow mm/m Roller Wave mm Uncoated float glass in accordance with EN 572-1 and EN 572-2 3,0 0,3 Others a

4,0 0,5 Dependant upon the wave length of the roller wave an appropriate length of gauge has to be used. a For enamelled glass which is not covered over the whole surface the manufacturer should be consulted.

SIST EN 1863-1:2012

EN 1863-1:2011 (E) 18 Table 5 — Maximum values for edge lift for horizontal heat strengthening Type of glass Thickness of glass mm Maximum values mm Uncoated float glass in accordance with EN 572-1 and EN 572-2 3 0,5 4 to 5 0,4 6 to 12 0,3 Others a all 0,5 Dependant upon the wave length of the roller wave an appropriate length of gauge has to be used.a For enamelled glass which is not covered over the whole surface the manufacturer should be consulted.

6.3.7 Limitation on overall bow and local distortion for vertically heat strengthened glass The maximum allowable values for the overall bow, when measured according to 6.3.2 and the local distortion, when measured according to 6.3.5 are given in Table 6. These values only apply to heat strengthened glass without holes and/or notches and/or

...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Steklo v gradbeništvu - Toplotno utrjevano natrij-kalcijevo silikatno steklo - 1. del: Definicija in opisGlas im Bauwesen - Teilvorgespanntes Kalknatronglas - Teil 1: Definition und BeschreibungVerre dans la construction - Verre de silicate sodo-calcique durci thermiquement - Partie 1: Définition et descriptionGlass in building - Heat strengthened soda lime silicate glass - Part 1: Definition and description81.040.20Steklo v gradbeništvuGlass in buildingICS:Ta slovenski standard je istoveten z:FprEN 1863-1kSIST FprEN 1863-1:2011en,fr,de01-maj-2011kSIST FprEN 1863-1:2011SLOVENSKI

STANDARD
kSIST FprEN 1863-1:2011
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 1863-1
March 2011 ICS 81.040.20 Will supersede EN 1863-1:2000English Version

Glass in building - Heat strengthened soda lime silicate glass - Part 1: Definition and description

Verre dans la construction - Verre de silicate sodo-calcique durci thermiquement - Partie 1: Définition et description

Glas im Bauwesen - Teilvorgespanntes Kalknatronglas - Teil 1: Definition und Beschreibung This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee CEN/TC 129.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
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B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. FprEN 1863-1:2011: EkSIST FprEN 1863-1:2011

FprEN 1863-1:2011 (E) 2 Contents Page Foreword ..............................................................................................................................................................4Introduction .........................................................................................................................................................51 Scope ......................................................................................................................................................62 Normative references ............................................................................................................................63 Terms and definitions ...........................................................................................................................64 Glass products .......................................................................................................................................75 Fracture characteristics ........................................................................................................................86 Dimensions and tolerances ..................................................................................................................86.1 Nominal thickness and thickness tolerances .....................................................................................86.2 Width and length (sizes) .......................................................................................................................96.2.1 General ....................................................................................................................................................96.2.2 Maximum and minimum sizes ..............................................................................................................96.2.3 Tolerances and squareness .................................................................................................................96.2.4 Edge deformation produced by the vertical process ...................................................................... 106.3 Flatness ............................................................................................................................................... 116.3.1 General ................................................................................................................................................. 116.3.2 Measurement of overall bow ............................................................................................................. 146.3.3 Measurement of roller wave .............................................................................................................. 156.3.4 Measurement of edge lift (for horizontal heat strengthened only) ................................................ 166.3.5 Measurement of local distortion (for vertical heat strengthened glass only) .............................. 176.3.6 Limitation on overall bow, roller waves and edge lift for horizontal heat strengthened glass ..................................................................................................................................................... 186.3.7 Limitation on overall bow and local distortion for vertical heat strengthened glass .................. 186.3.8 Other distortions ................................................................................................................................. 197 Edge and/or surface work, holes, notches and cut-outs ................................................................ 197.1 Warning ................................................................................................................................................ 197.2 Edge working of glass for toughening ............................................................................................. 197.3 Profiled edges ..................................................................................................................................... 207.4 Round holes ........................................................................................................................................ 207.4.1 General ................................................................................................................................................. 207.4.2 Diameter of holes ................................................................................................................................ 207.4.3 Limitations on position of holes ....................................................................................................... 207.4.4 Tolerances on hole diameters ........................................................................................................... 227.4.5 Tolerances on position of holes ........................................................................................................ 227.5 Holes/others ........................................................................................................................................ 237.6 Notches and cut-outs ......................................................................................................................... 237.7 Shaped panes ...................................................................................................................................... 248 Fragmentation test.............................................................................................................................. 248.1 General ................................................................................................................................................. 248.2 Dimensions and number of test specimens .................................................................................... 248.3 Test procedure .................................................................................................................................... 248.4 Assessment of fragmentation ........................................................................................................... 258.5 Evaluation of fragmentation .............................................................................................................. 279 Other physical characteristics .......................................................................................................... 279.1 Optical distortion ................................................................................................................................ 279.1.1 Heat strengthened soda lime silicate glass produced by vertical toughening ............................ 279.1.2 Heat strengthened soda lime silicate glass produced by horizontal toughening ....................... 27kSIST FprEN 1863-1:2011

FprEN 1863-1:2011 (E) 3 9.2 Anisotropy (iridescence) .................................................................................................................... 279.3 Thermal durability ............................................................................................................................... 289.4 Mechanical strength ............................................................................................................................ 2810 Marking ................................................................................................................................................. 28Annex A (informative)

Curved heat strengthened soda lime silicate glass ................................................ 29Annex B (informative)

Alternative method for the measurement of roller wave distortion ...................... 30B.1 Apparatus ............................................................................................................................................. 30B.2 Method .................................................................................................................................................. 30B.3 Limitations ........................................................................................................................................... 31B.4 Alternative use of apparatus .............................................................................................................. 31 kSIST FprEN 1863-1:2011

FprEN 1863-1:2011 (E) 4 Foreword This document (FprEN 1863-1:2011) has been prepared by Technical Committee CEN/TC 129 “Glass in building”, the secretariat of which is held by NBN. This document is currently submitted to the Unique Acceptance Procedure. This document will supersede EN 1863-1:2000.

kSIST FprEN 1863-1:2011

FprEN 1863-1:2011 (E) 5 Introduction Heat strengthened soda lime silicate glass has a higher resistance to thermal stress and an enhanced mechanical strength when compared to annealed glass. NOTE CEN/TC 129/WG 8 is producing standards for the determination of the design strength of glass and is preparing a design method.

This part of the document does not stand alone. It is a part of one document: — EN 1863-1, Glass in building — Heat strengthened soda lime silicate glass — Part 1: Definition and description; — EN 1863-2, Glass in building — Heat strengthened soda lime silicate glass — Part 2: Evaluation of conformity/Product standard. kSIST FprEN 1863-1:2011

FprEN 1863-1:2011 (E) 6 1 Scope This European Standard specifies tolerances, flatness, edgework, fragmentation and physical and mechanical characteristics of monolithic flat heat strengthened soda lime silicate glass of nominal thicknesses from 3 mm to 12 mm for use in buildings. Information on curved heat strengthened soda lime silicate glass is given in Annex A, but this product does not form part of this standard. Other requirements, not specified in this standard, can apply to heat strengthened soda lime silicate glass which is incorporated into assemblies, e.g. laminated glass or insulating glass units, or undergo an additional treatment, e.g. coating. The additional requirements are specified in the appropriate product standard. Heat strengthened soda lime silicate glass, in this case, does not lose its mechanical or thermal characteristics. This standard does not cover glass sandblasted after toughening. 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. EN 572-1, Glass in building — Basic soda lime silicate glass products — Part 1: Definitions and general physical and mechanical properties EN 572-2, Glass in building — Basic soda lime silicate glass products — Part 2: Float glass EN 572-4, Glass in building — Basic soda lime silicate glass products — Part 4: Drawn sheet glass EN 572-5, Glass in building — Basic soda lime silicate glass products — Part 5: Patterned glass EN 572-8, Glass in building — Basic soda lime silicate glass products — Part 8: Supplied and final cut sizes EN 673, Glass in building — Determination of thermal transmittance (U value) — Calculation method EN 1096-1, Glass in building — Coated glass — Part 1: Definitions and classification 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) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 curved heat strengthened soda lime silicate glass heat strengthened soda lime silicate glass which has been deliberately given a specific profile during manufacture (see Annex A) 3.2 edge deformation deformation of the edge because of the tong marks kSIST FprEN 1863-1:2011

FprEN 1863-1:2011 (E) 7 3.3 edge lift (also referred to as edge dip) distortion produced in horizontal heat strengthened glass, at the leading and trailing edge of the plate. This is a distortion produced by a reduction in surface flatness 3.4 enamelled heat strengthened soda lime silicate glass heat strengthened soda lime silicate glass which has a ceramic frit fired into the surface during the heat strengthening process. After heat strengthening the ceramic frit becomes an integral part of the glass NOTE 1 In the UK, this glass is also known as opaque heat strengthened soda lime silicate glass. NOTE 2 The application of the ceramic frit may be by a continuous process or discontinuous application, e.g. screen printing. The enamelled surface could be partially or wholly. 3.5 flat heat strengthened soda lime silicate glass heat strengthened soda lime silicate glass which has not been deliberately given a specific profile during manufacture 3.6 heat strengthened soda lime silicate glass glass within which a permanent surface compressive stress, additionally to the basic mechanical strength, has been induced by a controlled heating and cooling process in order to give it increased resistance to mechanical and thermal stress and prescribed fracture characteristics NOTE The thermal durability and mechanical strength are generated by the level of surface compression. These properties are not size dependent.

3.7 horizontal process process in which the glass is supported on horizontal rollers 3.8 local distortion local deformation of vertically heat strengthened glass underneath the tong marks 3.9 overall bow deformation of the whole pane of horizontally and vertically heat strengthened glass caused by the heating and cooling process 3.10 roller wave distortion distortion produced in horizontal heat strengthened glass as a result of the glass during toughening process being in contact with the rollers. This is a surface distortion produced by a reduction in surface flatness 3.11 vertical process process in which the glass is suspended by tongs 4 Glass products Heat strengthened soda lime silicate glass is made from a monolithic glass generally corresponding to one of the following standards:  soda lime silicate glass according to EN 572-1; kSIST FprEN 1863-1:2011

FprEN 1863-1:2011 (E) 8  float glass according to EN 572-2;  drawn sheet glass according to EN 572-4;  patterned glass according to EN 572-5;  supplied and final cut sizes according to EN 572-8;  coated glass according to EN 1096-1. Glass of nominal thicknesses between 3 mm and 12 mm other than those covered in the above standards are possible. 5 Fracture characteristics In the event of breakage, heat strengthened soda lime silicate glass fractures in a manner similar to annealed glass (see Clause 8). The fragmentation described in Clause 8 is undertaken on unrestrained test specimens. The fragmentation in service may not always correspond to that determined during the fragmentation test due to the imposition of other stresses, i.e. from fixing or from reprocessing (e.g. laminating). NOTE The fracture characteristics of glass are unaffected by temperatures between – 50 °C and + 100 °C.

6 Dimensions and tolerances

6.1 Nominal thickness and thickness tolerances The nominal thicknesses and thickness tolerances are those given in the relevant product standard (see Clause 4), some of which are reproduced in Table 1.

Table 1 — Nominal thicknesses and thickness tolerances Dimensions in millimetres Nominal Thickness tolerances for glass type thickness d Float Patterned Drawn sheet New antique drawn sheet 3 ± 0,2 ± 0,5 ± 0,2 not manufactured 4 ± 0,2 ± 0,5 ± 0,2 ± 0,3 5 ± 0,2 ± 0,5 ± 0,3 not manufactured 6 ± 0,2 ± 0,5 ± 0,3 ± 0,3 8 ± 0,3 ± 0,8 ± 0,4 not manufactured 10 ± 0,3 ± 1,0 ± 0,5 not manufactured 12 ± 0,3 ± 1,5 ± 0,6 not manufactured

kSIST FprEN 1863-1:2011

FprEN 1863-1:2011 (E) 9 The thickness of a pane shall be determined as for the basic product. The measurement shall be taken at the centres of the 4 sides, and away from the area of any tong marks (see Figure 2), which may be present. 6.2 Width and length (sizes) 6.2.1 General When heat strengthened soda lime silicate glass dimensions are quoted for rectangular panes, the first dimension shall be the width, B, and the second dimension the length, H, as shown in Figure 1. It shall be made clear which dimension is the width, B, and which is the length, H, when related to its installed position.

Figure 1 — Examples of width, B, and length, H, relative to the pane shape NOTE For heat strengthened soda lime silicate glass manufactured from patterned glass, the direction of the pattern should be specified relative to one of the dimensions. 6.2.2 Maximum and minimum sizes For maximum and minimum sizes, the manufacturer should be consulted. 6.2.3 Tolerances and squareness The nominal dimensions for width and length being given, the finished pane shall not be larger than the nominal dimensions increased by the tolerance t, or smaller than the nominal dimensions reduced by the tolerance t. Limits are given in Table 2. The squareness of rectangular glass panes is expressed by the difference between its diagonals.

The difference between the two diagonal lengths of the pane of glass shall not be larger than the deviation limit v as specified in Table 3. kSIST FprEN 1863-1:2011

FprEN 1863-1:2011 (E) 10 Table 2 — Tolerances on width, B, and length, H Dimensions in millimetres Nominal dimension of side,

B or H Tolerance, t nominal glass thickness,
d ≤ 8 nominal glass thickness,
d > 8 ≤ 2000 ± 2,0 ± 3,0 2000 < B or H ≤ 3000 ± 3,0 ± 4,0 > 3000 ± 4,0 ± 5,0

Table 3 — Limit deviations for the difference between diagonals Dimensions in millimetres Limit deviation v on the difference between diagonals Nominal dimension B or H nominal glass thickness, d ≤ 8 nominal glass thickness,

d > 8 ≤ 2000 ≤ 4 ≤ 6 2000 < B or H ≤ 3000 ≤ 6 ≤ 8 > 3000 ≤ 8 ≤ 10

6.2.4 Edge deformation produced by the vertical process The tongs used to suspend the glass during heat strengthening result in surface depressions, known as tong marks (see Figure 2). The centres of the tong marks are situated up to a maximum of 20 mm in from the edge. A deformation of the edge less than 2 mm can be produced in the region of the tong mark and there may also be an area of optical distortion. These deformations are included in the tolerances in Table 2.

Key 1
deformation 2
up to 20 mm 3
tong mark 4

100 mm radius maximum area of optical distortion Figure 2 — Tong mark deformation kSIST FprEN 1863-1:2011

FprEN 1863-1:2011 (E) 11 6.3 Flatness 6.3.1 General By the very nature of the heat strengthening process, it is not possible to obtain a product as flat as annealed glass. This difference in flatness depends on the type of glass, e.g. coated, patterned etc., glass dimensions, i.e. the nominal thickness, the dimensions and the ratio between the dimensions, and the heat strengthening process employed, i.e. vertical or horizontal. There are four kinds of distortion:  overall bow (see Figure 3);  roller wave distortion (for horizontal heat strengthened glass only) (see Figure 4);  edge lift (for horizontal heat strengthened glass only) (see Figure 5); NOTE 1 Overall bow, roller wave and edge lift can, in general, be accommodated by the framing system.  local distortion (for vertical heat strengthened glass only) (see Figure 6). NOTE 2 Local distortion needs to be allowed for within the glazing materials and the weather seals. For special requirements the manufacturers should be consulted.

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