BS EN 15683-1:2013 BSI Standards Publication Glass in building — Thermally toughened soda lime silicate channel shaped safety glass Part 1: Definition and description BS EN 15683-1:2013 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 15683-1:2013 The UK participation in its preparation was entrusted to Technical Committee B/520/1, Basic and transformed glass products A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2013 Published by BSI Standards Limited 2013 ISBN 978 580 80208 ICS 81.040.20 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2013 Amendments issued since publication Date Text affected BS EN 15683-1:2013 EN 15683-1 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM July 2013 ICS 81.040.20 English Version Glass in building - Thermally toughened soda lime silicate channel shaped safety glass - Part 1: Definition and description Verre dans la construction - Verre de silicate sodo-calcique profilé de sécurité trempé thermiquement - Partie : Définition et description Glas im Bauwesen - Thermisch vorgespanntes KalknatronProfilbau-Sicherheitsglas - Teil 1: Definition und Beschreibung This European Standard was approved by CEN on 30 May 2013 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 15683-1:2013: E BS EN 15683-1:2013 EN 15683-1:2013 (E) Contents Page Foreword Introduction Scope Normative references Terms and definitions Glass products .6 Fracture characteristics 6 6.1 6.2 6.2.1 6.2.2 6.3 6.3.1 6.3.2 6.3.3 6.4 6.4.1 6.4.2 6.4.3 Dimensions and tolerances General Dimensions and dimensional tolerances Nominal thickness (c) and thickness tolerances Width, flange height and length (sizes) .6 Shape Flange deviation Squareness of cut, q Tolerances on shape .8 Flatness General Measurement of overall bow Limitation on overall bow 10 Edge working of channel shaped glass before toughening 10 8.1 8.2 8.3 8.4 8.5 8.6 8.7 Fragmentation test 11 General 11 Dimensions and number of test specimens 11 Test procedure 11 Assessment of fragmentation 12 Minimum values from the particle count 12 Selection of the longest particle 13 Maximum length of longest particle 13 9.1 9.2 9.3 9.4 9.5 9.6 Other physical characteristics 13 Optical distortion 13 Anisotropy (iridescence) 13 Thermal durability 13 Profile bending strength 13 Allowable stress 14 Allowable deflection 14 10 Marking 14 Annex A (informative) Example of particle count 15 Bibliography 18 BS EN 15683-1:2013 EN 15683-1:2013 (E) Foreword This document (EN 15683-1:2013) has been prepared by Technical Committee CEN/TC 129 “Glass in Building”, the secretariat of which is held by IBN 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 January 2014, and conflicting national standards shall be withdrawn at the latest by January 2014 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 has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association EN 15683 is composed of the following parts: EN 15683-1, Glass in building — Thermally toughened soda lime silicate channel shaped safety glass — Part 1: Definition and description EN 15683-2, Glass in building — Thermally toughened soda lime silicate channel shaped safety glass — Part 2: Evaluation of conformity/Product standard According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom BS EN 15683-1:2013 EN 15683-1:2013 (E) Introduction Thermally toughened soda lime silicate channel shaped safety glass has a safer breakage behaviour when compared with annealed glass BS EN 15683-1:2013 EN 15683-1:2013 (E) Scope This European Standard specifies tolerances, flatness of web and flanges, flange deviation, edgework, fragmentation and physical and mechanical characteristics of monolithic thermally toughened soda lime silicate channel shaped safety glass for use in buildings Other requirements, not specified in this document, can apply to thermally toughened soda lime silicate channel shaped safety glass, which undergoes an additional treatment, e.g coating The additional requirements are specified in the appropriate product standard EN 15683-2 Thermally toughened soda lime silicate channel shaped safety glass, in this case, does not lose its mechanical or thermal characteristics Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application 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 572-7:2012, Glass in building — Basic soda lime silicate glass products — Part 7: Wired or unwired channel shaped glass EN 1288-4, Glass in building — Determination of the bending strength of glass — Part 4: Testing of channel shaped glass Terms and definitions For the purposes of this document, the following terms and definitions apply 3.1 thermally toughened soda lime silicate channel shaped safety glass glass within which a permanent surface compressive stress has been induced by a controlled heating and cooling process in order to give it greatly increased resistance to mechanical and thermal stress and prescribed fragmentation characteristics Note to entry: The mechanical properties, i.e thermal durability and profile bending strength, and safety properties, i.e fragmentation characteristics, are generated by the level of surface compression These properties not depend on the size of the channel shaped glass 3.2 enamelled thermally toughened soda lime silicate channel shaped safety glass thermally toughened soda lime silicate channel shaped safety glass which has a ceramic frit fired into the surface during the toughening process becoming an integral part of the glass after toughening 3.3 horizontal toughening process in which the glass is supported on horizontal rollers BS EN 15683-1:2013 EN 15683-1:2013 (E) Glass products Thermally toughened soda lime silicate channel shaped safety glass shall be made from a monolithic glass generally corresponding to the following standards: basic soda lime silicate glass products – unwired channel shaped glass according to EN 572-1 and EN 572-7; this may also be coated in accordance with EN 1096-1 Fracture characteristics In the event of breakage, thermally toughened soda lime silicate channel shaped safety glass fractures into numerous small pieces, the edges of which are generally blunt NOTE Fragmentation in service does not always correspond to that described in Clause 8, due to restraint from fixing or due to the cause of fracture Dimensions and tolerances 6.1 General The dimensions of thermally toughened soda lime silicate channel shaped safety glass are shown in Figure These are glass thickness (c), width (B), length (H) and flange height (d) 6.2 Dimensions and dimensional tolerances 6.2.1 Nominal thickness (c) and thickness tolerances The nominal thicknesses and thickness tolerances shall be those given in Table NOTE The tolerances of width, height of flange and thickness are those given in EN 572-7:2012, Table Table of EN 15683-1:2012 was extended by the length H The thickness shall be determined as for the basic product 6.2.2 Width, flange height and length (sizes) 6.2.2.1 General Thermally toughened soda lime silicate channel shaped safety glass dimensions are quoted as follows: the type which defines the width, B, the flange height, d, and the thickness, c; and the length, H EXAMPLE 232/41/6 – 000 The type may be given as a code rather than the full specification BS EN 15683-1:2013 EN 15683-1:2013 (E) Key H B d c length, mm width, mm flange height thickness Figure — Dimensions of a thermally toughened soda lime silicate channel shaped safety glass 6.2.2.2 Maximum and minimum sizes The range of width, B, is from 232 mm to 498 mm and maximum length is 000 mm The maximum available length will depend upon the thermal toughening equipment used; contact the manufacturer 6.2.2.3 Tolerances on dimensions The tolerances on the dimensions shall be those given in Table NOTE The tolerances of width, height of flange and thickness are those given in EN 572-7:2012, Table Table of EN 15683-1:2012 was extended by the length H Table — Nominal dimensions and dimensional tolerances Dimensions in millimetres Width B Height of flange d Thickness c Length H Nominal Tolerance Nominal Tolerance Nominal Tolerance Nominal Tolerance 232 to 498 ± 2,0 41 ± 1,0 ± 0,2 Up to ± 3,0 232 to 331 ± 2,0 60 ± 1,0 ± 0,2 000 6.3 Shape 6.3.1 Flange deviation The deviation of the flange, z, from perpendicular to the web is determined with a right angle, as shown in Figure BS EN 15683-1:2013 EN 15683-1:2013 (E) Key z flange deviation Figure — Determination of flange deviation 6.3.2 Squareness of cut, q The out of squareness of the web and flanges is determined at both cut ends It is measured relative to a plane perpendicular to the direction of draw of the glass at the intersection of the centre line of the web and of the cut edge (see Figure 3) The deviation of the flange plane is measured Key q squareness of cut Figure — Determination of squareness of cut 6.3.3 Tolerances on shape The tolerance on flange deviation, z, shall not exceed 1,0 mm The deviation on squareness of cut, q, shall not exceed 3,0 mm 6.4 Flatness 6.4.1 General By the very nature of the toughening process, it is not possible to obtain a product as flat as annealed glass The difference depends on the nominal thickness, the web and flange dimensions and the length Therefore, a distortion known as overall bow may occur (see Figure 4) NOTE Overall bow can, in general, be accommodated by the framing system BS EN 15683-1:2013 EN 15683-1:2013 (E) Key deformation for calculating overall bow length H Figure — Representation of overall bow 6.4.2 Measurement of overall bow The pane of glass shall be placed in a horizontal position on its side on a flange supported by two loadbearing blocks at the quarter points (see Figure 5) The deformation shall be measured along the middle axis of the web between the cut edges of the channel shaped glass as the maximum distance between a straight metal ruler, or a stretched wire, and the concave surface of the channel shaped glass (see Figure 4) The value for the bow is then expressed as the deformation, in millimetres, divided by the measured length of the channel shaped glass in millimetres The measurement shall be carried out at ambient temperature BS EN 15683-1:2013 EN 15683-1:2013 (E) Dimensions in millimetres Key H length, mm Figure — Support conditions for the measurement of overall bow 6.4.3 Limitation on overall bow The maximum allowable values for the overall bow, when measured according to 6.4.2, shall not exceed mm/m Edge working of channel shaped glass before toughening WARNING — Thermally toughened soda lime silicate channel shaped safety glass shall not be cut, sawed, drilled or edge worked after toughening The cut edges have to be edge worked prior to toughening The simplest type of edge working is the arrissed edge (see Figure 6) Figure — Arrissed edge (with blank spots) 10 BS EN 15683-1:2013 EN 15683-1:2013 (E) Fragmentation test 8.1 General The fragmentation test determines whether the glass breaks in the manner prescribed for a thermally toughened soda lime silicate channel shaped safety glass 8.2 Dimensions and number of test specimens The length (H) of the test specimens shall be 100 mm The width is determined by the glass type The test specimen shall be taped on the external surface to stop the fragments separating but still allowing the specimen to expand when fragmented Five specimens shall be tested 8.3 Test procedure The test specimen is placed web side down on a flat surface Each test specimen shall be impacted, using a pointed steel tool, at a position 13 mm in from the cut edge of the test specimen at the mid-point of that edge, until breakage occurs (see Figure 7) NOTE The fragmentation characteristics of glass are unaffected by temperatures between –50 °C and +100 °C Examples of steel tools are a hammer of about 75 g mass, a spring loaded centre punch, or other similar appliance with a hardened point The radius of curvature of the point should be approximately 0,2 mm The test specimen shall be laid flat on a table without any mechanical constraint In order to prevent scattering of the fragments, the specimen shall be simply held at the edges, e.g by a small frame, adhesive tape etc., so that the fragments remain interlocked after breakage yet extension of the specimen is not hindered Dimensions in millimetres Key B impact point width, mm Figure — Position of impact point 11 BS EN 15683-1:2013 EN 15683-1:2013 (E) 8.4 Assessment of fragmentation The particle count and measuring of the dimensions of the largest particle shall be made between to after fracture An area of radius 100 mm, centred on the impact point, and a border of 25 mm, round the cut edge of the test specimen together with the flanges (see Figure 8), shall be excluded from the assessment The particle count shall be made in the region of coarsest fracture (the aim being to obtain the minimum value) The particle count shall be made by placing a mask of (50 ± 1) mm × (50 ± 1) mm on the test piece (see Annex A) The number of crack-free particles within the mask shall be counted A particle is 'crack-free’ if it does not contain any cracks, which run from one edge to another (see Figure 9) Dimensions in millimetres Key B excluded area width Figure — Area to be excluded from the particle count determination and largest particle measurement Key and particle(s) Figure — Examples of crack-free particles and the assessment regarding the number In the particle count, all particles wholly contained within the area of the mask shall be counted as one particle each and all the particles, which are partially within the mask shall be counted as 1/2 particle each (see Annex A) 8.5 Minimum values from the particle count In order to classify a glass as a thermally toughened soda lime silicate channel shaped safety glass, the particle count of each test specimen shall not be less than the 40 12 BS EN 15683-1:2013 EN 15683-1:2013 (E) 8.6 Selection of the longest particle The longest particle shall be chosen from the body of the test specimen It shall not be in the excluded area (see 8.4) 8.7 Maximum length of longest particle In order to classify the glass as thermally toughened soda lime silicate channel shaped safety glass, the length of the longest particle shall not exceed 100 mm Other physical characteristics 9.1 Optical distortion While the hot glass is in contact with the rollers during the toughening process, a surface distortion is produced by a reduction in surface flatness, known as ‘roller wave’ Roller wave is generally noticed in reflection The web can show signs of small imprints in the surface (‘roller pick-up’) 9.2 Anisotropy (iridescence) The toughening process produces areas of different stress in the cross section of the glass These areas of stress produce a bi-refringent effect in the glass, which is visible in polarised light When thermally toughened soda lime silicate channel shaped safety glass is viewed in polarised light, the areas of stress show up as coloured zones, sometimes known as ‘leopard spots’ Polarised light occurs in normal daylight The amount of polarised light depends on the weather and the angle of the sun The bi-refringent effect is more noticeable either at a glancing angle or through polarised spectacles 9.3 Thermal durability The mechanical properties of thermally toughened soda lime silicate channel shaped safety glass are unchanged for continuous service up to 250 °C and are unaffected by sub-zero temperatures Thermally toughened soda lime silicate channel shaped safety glass is capable of resisting both sudden temperature changes and temperature differentials up to 200 K 9.4 Profile bending strength The value of profile bending strength can only be given as a statistical value associated with a particular probability of breakage and with a particular type of loading Testing shall be in accordance with EN 1288-4 The profile bending strength values apply to quasi-static loading over a short time, e.g wind loading, and relate to a % probability of breakage at the lower limit of the 95 % confidence interval Table — Minimum values for the profile bending strength of thermally toughened soda lime silicate channel shaped safety glass Load direction Minimum values for profile bending strength N/mm2 flange in tension 120 web in tension 66 13 BS EN 15683-1:2013 EN 15683-1:2013 (E) NOTE The values in Table represent the strength of thermally toughened soda lime silicate channel shaped safety glass that meet the requirements of 8.5 9.5 Allowable stress The recommended values for the allowable stress, fg;d, of thermally toughened channel shaped safety glass to be used for calculating the maximum glass length resistant against wind loads and using the calculation method given in EN 1288-4 is given in Table Table — Recommended values for the allowable stress of thermally toughened soda lime silicate channel shaped safety glass Load direction flange in tension web in tension Values for profile bending strength N/mm2 50 27.5 NOTE When engineering formulae or other methods appropriate to the load distribution are used to determine the glass stress imposed by the design load, a different value for the allowable stress may apply For other loads than wind loads different values may also apply 9.6 Allowable deflection There is no specific requirement of glass to limit the deflection of the glass under load Other standards or regulations may require deflection limits for particular applications If required, the allowable deflection, wd, shall be in accordance with the appropriate standard or regulation Consideration should be given to ensuring the glass is not excessively flexible when subjected to applied loads, as this can cause alarm to building users In the absence of any specific requirement, deflections shall be limited to Length/65 10 Marking Thermally toughened soda lime silicate channel shaped safety glass conforming to this document shall be permanently marked The marking shall give the following information: name or trademark of manufacturer; number of this document: EN 15683-1 14 BS EN 15683-1:2013 EN 15683-1:2013 (E) Annex A (informative) Example of particle count Figure A.1 — Example of selecting the area of coarsest fracture Select the area of coarsest fracture, place the template on the test specimen and draw round the template 15 BS EN 15683-1:2013 EN 15683-1:2013 (E) Number of perimeter particles = 32/2 = 16 Figure A.2 — Example of marking and counting Mark and count the perimeter fragments as 1/2 particle each 16 BS EN 15683-1:2013 EN 15683-1:2013 (E) Number of central particles = 53 Total number of particles = 16 + 53 = 69 Figure A.3 — Example for marking and counting of overall particle count for the specimen Mark and count the central fragments and add these to the perimeter count to obtain the particle count for the specimen 17 BS EN 15683-1:2013 EN 15683-1:2013 (E) Bibliography [1] EN 1096-1, Glass in building — Coated glass — Part 1: Definitions and classification [2] EN 12150-1:2000, Glass in building — Thermally toughened soda lime silicate safety glass — Part 1: Definition and description [3] EN 15683-2:2012, Glass in building — Thermally toughened soda lime silicate channel shaped safety glass — Part 2: Evaluation of conformity/Product standard 18 This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About us Revisions We bring together business, industry, government, consumers, innovators and others to shape their combined experience and expertise into standards -based solutions Our British Standards and other publications are updated by amendment or revision The knowledge embodied in our standards has been carefully assembled in a dependable format and refined through our open consultation process Organizations of all sizes and across all sectors choose standards to help them achieve their goals Information on standards 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