1、BRITISH STANDARD BS 952-2:1980 Glass for glazing Part 2: Terminology for work on glass UDC 666.15:698.3:001.4BS952-2:1980 This British Standard, having been prepared under the directionof the Elements and Components (of Diverse Materials)for Buildings Standards Committee, was published under the aut
2、horityofthe Executive Boardand comes into effect on 30April1980 BSI 12-1999 First published March 1941 First revision July 1953 Second revision January 1964 Third revision Part 1 February1978 Third revision Part 2 April 1980 The following BSI references relate to the work on this standard: Committee
3、 reference ECB/4 Draft for comment 70/16666 DC ISBN 0 580 11308 6 Cooperating organizations The Elements and Components (of Diverse Materials) for Buildings Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following Government depart
4、ments and professional and industrial organizations: The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Agrment Board Glass and Glazing Federation* Aluminium Fed
5、eration Health and Safety Executive Asbestos Cement Manufacturers Association Incorporated Association of Architects and Brick Development Association Surveyors* British Ceramic Research Association Institute of Building Control Officers British Hardware Federation Institute of Quality Assurance Bri
6、tish Plastics Federation* Institution of Structural Engineers British Precast Concrete Federation Ltd. Mastic Asphalt Council and Employers British Woodworking Federation* Federation Consumer Standards Advisory Committee of National Council of Building Materials BSI* Producers Convention of Scottish
7、 Local Authorities National Federation of Building Trades Department of the Environment (Building Employers Research Establishment, Princes National Federation of Roofing Contractors Risborough Laboratory) Royal Institute of British Architects* Department of the Environment (Housing and Royal Instit
8、ution of Chartered Surveyors* Construction)* Scottish Development Department Department of the Environment (PSA)* Trades Union Congress Aluminium Window Association Flat Glass Manufacturers Association Architectural Aluminium Association Institution of Municipal Engineers Chief and Assistant Chief F
9、ire Officers Metal Window Federation of Great Britain Association National Association of Shopfitters Department of the Environment (Building National House-building Council Research Establishment) Patent Glazing Conference Department of the Environment (Building Sealant Manufacturers Conference Res
10、earch Establishment, Fire Research Union of Construction, Allied Trades and Station) Technicians Amendments issued since publication Amd. No. Date of issue CommentsBS952-2:1980 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover Foreword ii 1 Scope 1 2 Cutting processes 1 3 Obsc
11、uring processes 8 4 Silvering 9 5 Gilding 9 6 Staining or painting, and firing 9 7 Bending 9 Index 12 Figure 1 Types of brilliant cut 1 Figure 2 Finger slot 1 Figure 3 Standard bends for glass 10 Table 1 Edge work and bevelling 2BS952-2:1980 ii BSI 12-1999 Foreword The first edition of BS952 was pub
12、lished in1941, revised in1953, and again in1964 under the authority of the Glass Industry Standards Committee. The present revision, now under the direction of the Elements and Components (of Diverse Materials) for Buildings Standards Committee, has been published in two separate Parts of which this
13、 is Part2. Part1 “Classification” was published in1978. Part 1 classifies soda-lime-silica glasses for building purposes and gives details of nominal thickness, maximum sizes, approximate weights and tolerances. These glasses are intended for use in accordance with the recommendations of CP152 “Glaz
14、ing and fixing of glass for buildings”. This Part 2 includes illustrated definitions of terms in general use relating to the cutting, working and decorating of glass for building purposes. It is intended to publish, in due course, a Part3, which will include a more detailed technical specification f
15、or glass in building in line with an EEC Directive currently being prepared. 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 conf
16、er immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 12 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 tabl
17、e on the inside front cover.BS952-2:1980 BSI 12-1999 1 1 Scope This Part of this British Standard provides descriptions and illustrations of types of work on glass. The main processes, comprising cutting, obscuring and the various decorating processes, are described. 2 Cutting processes 2.1 Edge wor
18、k and bevelling. Details of edge work and bevelling are given inTable 1. 2.2 Brilliant cutting. A decorative process employed for cutting designs on glass whereby various types of cut (V cuts, edge cuts, panel cuts, round cuts, and decorative motifs such as punts and hollows) are made. The cuts may
19、be subsequently smoothed and polished. The different types of cut are illustrated inFigure 1. 2.3 Finger slotting. A feature obtained on the surface of the glass by allowing the edge of a smooth stone wheel to penetrate the surface. The typical detail of a finger slot is shown inFigure 2. A finger s
20、lot (also known as a “cut sunk finger grip”) is a purely functional surface treatment in glass of virtually all types to facilitate easy sliding of glass doors. Since finger slots are made by the controlled grinding of a wheel into one side of the glass, they vary dimensionally according to the diam
21、eter and width of the wheel. However, a typical size is65mm 20mm 3mm. Finger slots are usually smooth ground, but can be polished. 2.4 Engraving. A decorative process, usually applied to hollow glassware, but sometimes also to flat glass, whereby the surface of the glass is cut by a small revolving
22、wheel with or without an abrasive. The cut may or may not be polished. Figure 1 Types of brilliant cut (not to scale) Figure 2 Finger slot (or cut sunk finger grip) (not to scale)BS952-2:1980 2 BSI 12-1999 Table 1 Edge work and bevelling Term Form Finish Illustration 1. Arris edge A small bevel of w
23、idth not exceeding1.6mm at an angle of approximately45 to the surface of the glass Ground, smoothed or polished 2. Flat edge The cut edge of the glass is flat and the surface edges are slightly arrised Ground, smoothed or polished 3. Round edge The cut edge of the glass is slightly curved to form an
24、 arc of a circle Ground, smoothed or polished 4. Half round Half of the cut edge of the glass is rounded approximately in the form of a quarter circle. The remaining surface edge is slightly rounded Ground, smoothed or polished 5. Full round The cut edge of the glass is rounded approximately in the
25、form of a semi-circle Ground, smoothed or polished 6. Thumb or bullnose The surface edge of the glass is curved in a shape resembling the profile of a thumb Ground, smoothed or polished 7. Bevel The surface edge of the glass is bevelled to3mm or more in width as required. The angle formed by the int
26、ersection of the plane of the bevel with the face of the glass is about7“ The bevel is polished unless otherwise specified. The nose of the bevel is left as cut 8. Mitre bevel The cut edge of the glass is bevelled to an angle of approximately45 (unless otherwise specified); the extreme point is slig
27、htly arrised. If required the knife edge can be slightly radiused to form an arc of a circle when in contact with the corresponding edge of another plate Ground, smoothed or polished 9. Mitre bevel, both sides Both surface edges of the glass are bevelled and, unless otherwise specified, the complete
28、 angle will be approximately68 . The extreme point is slightly rounded Ground, smoothed or polished 10. Steep bevel Any bevel where the angle of bevel is more than7“ and less than45 Ground, smoothed or polishedBS952-2:1980 BSI 12-1999 3 Table 1 Edge work and bevelling Term Form Finish Illustration 1
29、1. Feather edge Any bevelled edge where the bevel is brought as close as practicable to the back edge of the glass The bevel is polished unless otherwise specified 12. Vauxhall or antique bevel The surface edge is bevelled at an angle less than7“ so as to give a very shallow and wide bevel that has
30、no clearly defined back edge The bevel is polished unless otherwise specified. The nose of the bevel is left as cut 13. Bevel both surfaces Both surface edges are bevelled to the usual standard bevel The bevel is polished unless otherwise specified. The nose of the bevel is left as cut 14. Double be
31、vel The surface edge of the glass on one face is bevelled, the bevel consisting of two intersecting planes The bevel is polished unless otherwise specified. The nose of the bevel is left as cut 15. Bevel with edge nose polished The cut edge of the standard bevel is slightly rounded Polished 16. Flat
32、 edge and bevel The surface edge is bevelled at an angle of approximately45 Polished unless otherwise specified 17. Diminishing stop bevel (also known as “stop scallop” or “fade bevel”) A bevel in which only a portion of the surface edge is bevelled, the bevel running out on a small radius Polished
33、unless otherwise specifiedBS952-2:1980 4 BSI 12-1999 Table 1 Edge work and bevelling Term Form Finish Illustration 18. Tapered stop bevel (also known as “stop mitre”) A bevel in which a portion of the surface edge is bevelled, the bevel running out on a straight line at an angle in the cut edge Poli
34、shed unless otherwise specified 19. Taper bevel A bevel tapering over its full length Polished unless otherwise specifiedBS952-2:1980 BSI 12-1999 5 Table 1 Edge work and bevelling Term Form Finish Illustration 20. Beaded bevel (also known as “rope bevel”) A standard bevel having super-imposed on the
35、 line of intersection of the bevel with the surface of the glass a series of brilliant cut shallow grooves Polished unless otherwise specified 21. Scalloped bevel (also known as “spoon bevel”) A series of scallops meeting at the surface edge of the glass Polished unless otherwise specifiedBS952-2:19
36、80 6 BSI 12-1999 Table 1 Edge work and bevelling Term Form Finish Illustration 22. Fluted bevel (also known as “thumb bevel”) A series of flutes (round cuts) meeting each other and running in from the edge of the glass Polished unless otherwise specified 23. Crossed bevel A series of intersecting be
37、vels Polished unless otherwise specifiedBS952-2:1980 BSI 12-1999 7 Table 1 Edge work and bevelling Term Form Finish Illustration 24. Flute and mitre bevel (also known as “thumb and mitre bevel”) A bevel formed to the outline of a thumb with intermediate faceted mitres brilliantly polished Polished u
38、nless otherwise specified 25. Scallop and mitre bevel (also known as “spoon and mitre bevel”) A spooned bevel with intermediate faceted mitres brilliantly polished Polished unless otherwise specifiedBS952-2:1980 8 BSI 12-1999 Table 1 Edge work and bevelling 3 Obscuring processes 3.1 General. These p
39、rocesses involve treatment of the whole or part of the surface of glass after manufacture, whereby vision through the glass is obscured to a varying degree, and the light-diffusing properties of the glass are increased. Decorative effects are also obtained by these processes. 3.2 Sandblasting. A pro
40、cess whereby the surface of glass is obscured by means of a jet of sand or other abrasive propelled against it. The finish will be fine, medium or coarse, according to the pressure of the jet and the nature of the abrasive used. The following terminology is used: 3.3 Grinding. A process whereby the
41、surface of glass is obscured by grinding with an abrasive grit. In general, grinding produces a finer surface than sandblasting, the fineness depending on the nature of the abrasive grit used. The following terminology is used. 3.4 Acid embossing. A process whereby the surface of glass is obscured b
42、y treatment with hydrofluoric acid or its compounds. The degree of obscuration and the character of the surface produced depend upon the number of treatments with acid and the form of acid used. The following terminology is used: Term Form Finish Illustration 26. Festoon bevel A plain bevel having s
43、uper-imposed on the line of intersection of the bevel with the surface of the glass a series of brilliant cut shallow grooves interspaced with deep brilliant cut faceted diamond shaped mitres Polished unless otherwise specified Process Terminology Description Sandblast obscuring Plain sandblast: fin
44、e, medium orcoarse A surface obscured by sandblasting: in general a coarser surface than emery obscured and white in appearance. Shaded sandblast Sandblast obscuration graduated in texture from clear to full obscuration. Peppered sandblast A finely textured sandblast obscuration with a mottled effec
45、t. Grav or modelled sandblast Sandblasted to a series of depths. Process Terminology Description Emery obscuring Emery obscured: fine, medium or coarse A surface obscured by hand grinding: in general a finer surface than sandblast, but not so white in appearance. Process Terminology Description Acid
46、 embossing Clear stipple embossed: fine, medium or coarse A slight obscuration with a texture finish.BS952-2:1980 BSI 12-1999 9 NOTE“Brights” are any portions of the glass that are not treated with acid and that form part of the design. 4 Silvering A process whereby silver is deposited on the glass
47、and covered or coated with a protective medium. The term “silvering” is also used to describe the deposition on glass of other metals, e.g. “gold silvering”, “copper silvering”, etc. 5 Gilding A process employed largely for lettering and decorative work, whereby leaf metal such as gold leaf is appli
48、ed to the surface of glass and coated with a protective medium. 6 Staining or painting, and firing A process whereby glass is first coated with a fusible pigment, and subsequently fired so that the colour becomes permanent. 7 Bending 7.1 General. All forms of annealed flat glass can be bent. Subject
49、 to certain limitations, laminated bent glass and toughened bent glass can be produced. NOTESome types of annealed glass may exhibit changed characteristics in the process of bending (e.g. shade in some coloured glasses). 7.2 Bending curves. Bending curves in common use are as follows (seealsoFigure 3): A. Curves that are bent to a given radius one way of the pane only, which applies to the whole length or width of the pane, and not to one part only, the depth of bend not exceeding one-eighth of the length of the bent side of
