BS-EN-572-5-1995.pdf

BRITISH STANDARD BS EN 572-5:1995 Glass in building Basic soda lime silicate glass products Part 5: Patterned glass The European Standard EN 572-5:1994 has the status of a British Standard Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 572-5:1995 This British Standard, having been prepared under the direction of the Building and Civil Engineering Sector Board (B/-), was published under the authority of the Standards Board and comes into effect on 15 March 1995 © BSI 03-1999 The following BSI references relate to the work on this standard: Committee reference B/520/1 Draft for comment 91/18125 DC ISBN 0 580 23621 8 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standard FinlandSuomen Standardisoimisliito, r.y. FranceAssociation française de normalisation GermanyDeutsches Institut für Normung e.V. GreeceHellenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxembourgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portuguès da Qualidade SpainAsociación Española de Normalización y Certificación SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 572-5:1995 © BSI 03-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword 2 Text of EN 572-5 3 National annex NA (informative) Committees responsibleInside back cover National annex NB (informative) Cross-referenceInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 572-5:1995 ii © BSI 03-1999 National foreword This Part of BS EN 572 has been prepared by Subcommittee B/520/1 and is the English language version of EN 572-5:1994, Glass in building Basic soda lime silicate glass products Part 5: Patterned glass published by the European Committee for Standardization (CEN). It does not replace any current British Standard. EN 572-5 was produced as a result of international discussions in which the United Kingdom took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 572-5 November 1994 ICS 81.040.20 Descriptors: Construction, glass, glassware, dimensions, dimensional tolerances, appearance, defects, quality, acceptability, designation English version Glass in building Basic soda lime silicate glass products Part 5: Patterned glass Verre dans la construction Produits de base: verre de silicate sodo-calicique Partie 5: Verre imprimé Glas im Bauwesen Basiserzeugnisse aus Kalk-Natronglas Teil 5: Ornamentglas This European Standard was approved by CEN on 1994-11-08. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1994 Copyright reserved to CEN members Ref. No. EN 572-5:1994 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 572-5:1994 © BSI 03-1999 2 Foreword This European Standard has been prepared by the Technical Committee CEN/TC 129, Glass in building, the secretariat of which is held by IBN. CEN/TC 129/WG1, Basic glass products, prepared a working draft based on the document ISO/TC 160 N56 Glass in buildings Basic product Part 5: Cast glass. This document was drawn up by ISO/TC 160, Glass in building. 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 1995, and conflicting national standards shall be withdrawn at the latest by May 1995. According to the Common CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belguim, Denmark, Finalnd, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kindom. Contents Page Foreword2 1 Scope3 2Normative references3 3Definitions3 3.1Length, H, and width, B3 3.2Stock sizes3 3.3Visual faults3 3.4Spherical or quasi-spherical spot faults3 3.5Elongated spot faults3 3.6Linear/extended faults3 3.7Pattern faults3 3.8Deviation of the pattern3 4Dimensional requirements3 4.1Thickness3 4.2Length, width and squareness4 5Quality requirements4 5.1Methods of observation and measurement4 5.2Acceptance levels5 6Designation5 Figure 1 Relationship between length, width and direction of draw3 Figure 2 Determination of length, width and squareness4 Figure 3 Representations of the types of pattern faults5 Table 1 Tolerances on nominal thickness3 Table 2 Tolerances, t, on length, H, and width, B, according to the nominal thickness of the glass4 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 572-5:1994 © BSI 03-19993 1 Scope This Part of this European Standard specifies dimensional and minimum quality requirements (in respect of visual and pattern faults) for patterned glass as defined in EN 572-1, for use in building. This Part of this standard applies only to patterned glass supplied in rectangular panes and in stock sizes. This Part of this standard does not apply to patterned glass in cut sizes for final end use. 2 Normative references This European Standard incorporates by dated or undated references, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 572-1, Glass in building Basic soda lime silicate glass products Part 1: Definitions and general physical and mechanical properties. 3 Definitions For the purposes of this Part of this European Standard, the following definitions apply. 3.1 length, H, and width, B these are defined with reference to the direction of draw of the glass ribbon as shown in Figure 1 3.2 stock sizes glass delivered in the following sizes: Nominal length H: 2 100 mm to 4 500 mm Nominal width B: 1 260 mm to 2 520 mm NOTEThe maximum stock sizes available depend on the manufacturer and the pattern. 3.3 visual faults these are faults which alter the visual quality of the glass. They include spot faults, linear/extended faults and pattern faults 3.4 spherical or quasi-spherical spot faults these are spot faults whose larger dimension is less than or equal to twice the smaller dimension 3.5 elongated spot faults these are spot faults whose larger dimension is more than twice the smaller dimension 3.6 linear/extended faults these faults can be on or in the glass, in the form of deposits, marks or scratches which occupy an extended length or area 3.7 pattern faults these are deviations of the pattern relative to a reference, e.g. line or straight edge 3.8 deviation of the pattern This is a deviation, x, of the pattern 4 Dimensional requirements 4.1 Thickness The actual thickness shall be the average of four measurements, taken to the nearest 0,01 mm, one taken at the thickest and closest point to the centre of each side. Measurement shall be by means of an instrument of the plate gauge type with a diameter of 50 mm ± 5 mm. NOTEThe mechanical resistance of patterned glass is a function of the pattern as well as the thickness. 4.1.1 Tolerances The actual thickness rounded to the nearest 0,1 mm shall not vary from the nominal thickness by more than the tolerances shown in Table 1. Table 1 Tolerances on nominal thickness Figure 1 Relationship between length, width and direction of draw Nominal thicknesses (mm)Tolerances (mm) 3± 0,5 4± 0,5 5± 0,5 6± 0,5 8± 0,8 10± 1,0 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 572-5:1994 4 © BSI 03-1999 4.2 Length, width and squareness The nominal dimensions for length, H and width, B, being given, the pane shall not be larger than a prescribed rectangle resulting from the nominal dimensions increased by the permissible plus tolerance, t, or smaller than a prescribed rectangle reduced by the permissible minus tolerance, t. The sides of the prescribed rectangles shall be parallel to one another and these rectangles shall have a common centre (see Figure 2). The limits of squareness shall also be prescribed by these rectangles. 4.2.1 Tolerances The tolerances, t, (see Figure 2) on the nominal dimensions length, H, and width, B, are dependant on the thickness of the glass and are shown in Table 2. Table 2 Tolerances, t, on length, H, and width, B, according to the nominal thickness of the glass 5 Quality requirements One quality level is considered in this standard. This is determined by evaluation of the visual faults. There are three different types of pattern faults considered which may occur simultaneously. They are shown in Figure 3 and are: out of square; waviness; box. 5.1 Methods of observation and measurement 5.1.1 Visual faults 5.1.1.1 Spot and linear/extended faults The glass pane to be examined is illuminated in conditions approximating to diffuse daylight and is observed in front of a matt grey screen. Place the pane of glass to be examined vertically 3 m in front of and parallel to the screen. Arrange the point of observation 1,5 m from the glass, keeping the direction of observation normal to the glass surface. View the pane of glass, and note the presence of visually disturbing faults. a) Spot faults Measure the dimensions of these faults with a micrometer with graduations in tenths of a millimetre. Note the number, dimensions and concentration of the spot faults. Nominal thickness (mm) Tolerance, t (mm) 3 4 5 6 3 8 10 4 Figure 2 Determination of length, width and squareness Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 572-5:1994 © BSI 03-19995 b) Linear/extended faults Note the number of these faults. 5.1.1.2 Pattern faults A reference, e.g. line or straight edge, is placed on the glass as shown in Figure 3. The deviation, x, of the pattern in relation to this reference is measured. 5.2 Acceptance levels 5.2.1 Spot faults a) Spherical and quasi-spherical spot faults. If the larger dimension is # 2,0 mm, they are acceptable without restriction. If the larger dimension is 2,0 mm and # 5,0 mm, they are acceptable up to 2 in any 1 m × 1 m area. They are not acceptable if the larger dimension is 5,0 mm. b) Elongated spot faults of width # 2,0 mm. If their length is # 4,0 mm, they are acceptable without restriction. If their length is 4,0 mm and # 25,0 mm, they are acceptable if the sum of the lengths is # 100 mm in any 1 m × 1 m area. They are not acceptable if their length is 25,0 mm. c) Elongated spot faults of width 2,0 mm. If the larger dimension is # 8,0 mm, they are acceptable up to 2 in any 1 m × 1 m area. They are not acceptable if the larger dimension is 8,0 mm. 5.2.2 Linear/extended faults The number of allowable faults is an average of 0,05 faults in 20 m2 of glass related to at least 20 tonnes. 5.2.3 Pattern faults The deviation of the pattern, x, (see Figure 3) shall not exceed 12 mm per metre. 6 Designation Patterned glass in compliance with this standard shall be designated respectively by: type; tint (manufacturers reference) or clear; pattern (manufacturers reference); nominal thickness in millimetres; nominal length, H, and width B, in millimetres; reference to this Part of this standard. NOTEThe scale of these drawings is exaggerated to be explicit. Figure 3 Representations of the types of pattern faults Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 572-5:1994 6 © BSI 03-1999 Example Patterned glass, pattern reference “PATTERN”, clear, thickness 4 mm, length 4,50 m, width 1,60 m, intended for use in buildings, is designated as follows: Patterned glass, clear, “PATTERN”, 4 mm, 4 500 mm × 1 600 mm, EN 572-5. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:31:37 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 572-5:1995 © BSI 03-1999 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by Technical Committee B/520, Glass and glazing in buildings, to Subcommittee B/520/1, Basic and transformed glass products, upon which the following bodies were represented: Association of Building Engineers Department of the Environment (Building Research Establishment) Department of the Environment (Construction Directorate) Flat glass Manufacturers Association Glass