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1、BRITISH STANDARD BS 7376:1990 Specification for Inclusion of glass in the construction of tables or trolleys Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 15:02:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7376:1990 This British Standard, having been prepa
2、red under the direction of the Consumer and Contract Goods Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 30 November 1990 BSI 02-1999 The following BSI references relate to the work on this standard: Committee reference CCM/48 Draft for co
3、mment 90/36169 DC ISBN 0 580 19017 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Consumer and Contract Goods Standards Policy Committee (CCM/-) to Technical Committee CCM/48, upon which the following bodies were represented: Associat
4、ion for Consumer Research (ACRE) British Association for Accident and Emergency Medicine British Contract Furnishing Association British Furniture Manufacturers Federation British Shops and Stores Association (BSSA) Child Accident Prevention Trust Consumer Policy Committee of BSI Deparment of Trade
5、and Industry (Consumer Safety Unit, C A Division) Faculty of Medicine, Leeds University Flat Glass Manufacturers Association Furniture Industry Research Association Glass and Glazing Federation Ice (Ergonomics) Institute of Trading Standards Administration Royal Society for the Prevention of Acciden
6、ts Society of Glass Technology Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 15:02:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7376:1990 BSI 02-1999i Contents Page Committees responsibleInside front
7、 cover Forewordii 1Scope1 2Definitions1 3Trolleys that contain a heating device1 4Tables or trolleys that do not contain a heating device but which include glass in their construction1 5Marking3 Table 1 Minimum BS 6206 classification and nominal thicknesses for glass that is not supported over its e
8、ntire area2 Table 2 Nominal thicknesses for glass that is supported over its entire area2 Table 3 Tolerance on nominal thickness for toughened, annealed and film backed glass3 Publications referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec
9、 08 15:02:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7376:1990 ii BSI 02-1999 Foreword This British Standard has been prepared under the direction of the Consumer and Contract Goods Standards Policy Committee at the request of the Department of Trade and Industrys Consumer Safety Unit. The pur
10、pose of this British Standard is to provide designers, manufacturers, retailers, consumers and other interested parties with performance requirements that should minimize the risks of serious accidents with glass in tables or trolleys. It is anticipated that BS 6250-2 will be amended to require that
11、 when glass is included in the construction of a table or trolley, the table or trolley will comply with this new British Standard. The technical committee responsible for this British Standard intends to publish further British Standards concerning glass in or associated with furniture. This Britis
12、h Standard calls for the use of test procedures that may be injurious to health if adequate precautions are not taken by the person carrying out the test. It in no way absolves those responsible for testing from statutory obligations relating to health and safety. A British Standard does not purport
13、 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 cove
14、r, pages i and ii, pages 1 to 4, 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: London South Bank University, London South Ban
15、k University, Fri Dec 08 15:02:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7376:1990 BSI 02-19991 1 Scope This British Standard specifies general requirements, performance requirements and thickness requirements necessary to ensure reasonable safety of flat glass, greater than 0.02 m2, included
16、 in the construction of tables or trolleys, and takes account of the forseeable use of the table or trolley. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this British Standard the following definitions apply. 2
17、.1 toughened glass glass, the surface of which has been rapidly cooled from near the softening point so that a residual compressive stress remains in the surface after complete cooling NOTE 1This process increases the thermal and mechanical strength of the glass and tends to make it shatter into sma
18、ller and less angular fragments than an ordinary glass when it is subject to a breaking stress. NOTE 2Toughened glass is also known as tempered glass. 2.2 annealed glass glass which has been heated to the annealing temperature to remove internal stresses and cooled under controlled conditions NOTE 1
19、When broken, annealed glass tends to break into dagger-like shards. NOTE 2Annealed glass is sometimes referred to as ordinary glass. 2.3 laminated glass two or more layers of glass permanently bonded together by one or more interlayers of plastics and considered as one piece of glass NOTEThe fractur
20、e characteristics of laminated glass are similar to those of the type of glass present in the laminate. Impact energy can be absorbed by the interlayers of plastics intended to hold together pieces of glass when broken. 2.4 film backed glass glass to which a film of flexible plastics has been applie
21、d NOTEThe working surface of film backed glass is the glass surface. 2.5 nominal thickness the thickness of glass prior to edge working or surface decoration 2.6 decorated glass glass, the surface of which has been worked, for example by acid etching or embossing, sandblasting, brilliant cutting or
22、engraving, to give a decorative effect (see BS 3447) or has been fired with enamels or screen printed 2.7 cast glass glass manufactured by the rolling process NOTECast glass is also known as patterned glass. 3 Trolleys that contain a heating device All flat glass components of trolleys that contain
23、a heating device shall comply with BS 3193. 4 Tables or trolleys that do not contain a heating device but which include glass in their construction 4.1 Edgework and bevelling The edge of glass used in the construction of tables or trolleys shall be edge worked or bevelled (see Table 1 of BS 952-2).
24、The edge of laminated or film backed glass shall be protected from moisture. 4.2 Contact with other materials NOTE 1It is recommended that hard materials likely to cause surface damage should not be in contact with the glass. There shall be no metal to glass, stone to glass, or glass to glass contac
25、t in tables or trolleys. These materials shall be separated by at least 0.5 mm. NOTE 2Allowance should be made for any difference in co-efficients of thermal expansion of glass and the surrounding components of the table or trolley, having regard to manufacturing tolerances on the dimensions of the
26、glass. 4.3 Film backed glass When film backed glass is used in the construction of a table or trolley the glass surface shall be the working surface. 4.4 Support of glass 4.4.1 When the glass is moved to extreme positions in any direction horizontally it shall overlap all supports simultaneously by
27、at least 6 mm. 4.4.2 The minimum horizontal area of each support shall be 36 mm2. 4.4.3 When glass is unsupported at its edges, for example in a pedestal table, the table or trolley shall pass the vertical and horizontal static load tests given in BS 4875-5 at test level 2 and the stability tests de
28、scribed in BS 4875-6. NOTEThe interpretation of results is explained in BS 4875-5 and BS 4875-6. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 15:02:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7376:1990 2 BSI 02-1999 4.5 Construction and performance tests
29、 4.5.1 General Tables or trolleys incorporating suckers or cups to retain the glass or to provide buffer contact points shall comply with 4.5.3. Other tables or trolleys shall comply with either 4.5.2 or 4.5.3. 4.5.2 Construction 4.5.2.1 Glass not supported over its entire area 4.5.2.1.1 Annealed gl
30、ass shall be supported for not less than 50 % of its perimeter; the support shall be in at least two non-adjacent regions and shall be not more than 100 mm from the edge of the glass. 4.5.2.1.2 Toughened, laminated or annealed glass, shall comply with the relevant nominal thickness and relevant BS 6
31、206 classification given in Table 1. 4.5.2.1.3 When film backed glass is part of a table or trolley, the table or trolley shall comply with 4.5.3. 4.5.2.2 Glass supported over its entire area 4.5.2.2.1 Glass, which has an area no greater than 1.5 m2, shall comply with the relevant nominal thickness
32、given in Table 2. Glass which has an area greater than 1.5 m2, shall be either toughened glass with a nominal thickness of at least 4 mm or laminated glass with a nominal thickness of at least 4.4 mm. 4.5.2.2.2 When annealed glass is part of a table or trolley, the table or trolley, with the glass r
33、emoved but a non-structural compensating weight equivalent to that of the glass replacing the glass, shall pass the horizontal static load, vertical impact and horizontal fatigue tests given in BS 4875-5 at test level 3. NOTEThe interpretation of results is explained in BS 4875-5. 4.5.2.3 Nominal th
34、ickness tolerance The tolerance on nominal thickness (see 2.5) of toughened, annealed and film backed glass, and of the individual layers of glass in laminated structures, shall be as given in Table 3 when determined by the method described in BS 952-1. The tolerance on nominal thickness of laminate
35、d glass shall not exceed the sum of the tolerances of the individual layers of glass in the laminate. Table 1 Minimum BS 6206 classification and nominal thicknesses for glass that is not supported over its entire area (see 4.5.2.1) Table 2 Nominal thicknesses for glass that is supported over its ent
36、ire area (see 4.5.2.2) Area of glassMinimum BS 6206 classification Nominal thickness (see 4.5.2.3) Toughened glassLaminated glassAnnealed glass m2mmmmmm # 0.25class C$4.0$6.4$ 10.0 0.25 to # 0.50class C$5.0$6.4$ 10.0 0.50 to # 0.75class C$6.0$6.4$ 12.0 0.75 to # 1.50class B$8.0$8.4$ 15.0 1.50class A
37、$ 10.0$ 10.4$ 19.0 Area of glassNominal thickness (see 4.5.2.3) Annealed glassToughened glassLaminated glassFilm backed glass m2mmmmmmmm # 0.5$ 4.0$ 4.0$ 4.4$ 4.0 0.5 to # 1.0$ 5.0$ 4.0$ 4.4$ 4.0 1.0 to # 1.5$ 6.0$ 4.0$ 4.4$ 4.0 1.5see 4.5.2.2.1$ 4.0$ 4.4see 4.5.2.2.1 Licensed Copy: London South Ban
38、k University, London South Bank University, Fri Dec 08 15:02:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7376:1990 BSI 02-19993 Table 3 Tolerance on nominal thickness for toughened, annealed and film backed glass 4.5.3 Performance tests NOTEThe interpretation of results is given in BS 4875-5. 4
39、.5.3.1 When glass that complies with class A of BS 6206 is part of a table or trolley, the table or trolley shall pass the vertical static load and vertical impact tests given in BS 4875-5 at test level 2, except that in the vertical impact test rectangular tops shall also be impacted 10 times at te
40、st level 2 as close as possible to the corner and 10 times at test level 2 at their geometric centre. For non-rectangular tables, see 4.5.3.3. 4.5.3.2 When glass that does not comply with class A of BS 6206 is part of a table or trolley, the table or trolley shall pass the vertical static load and v
41、ertical impact tests given in BS 4875-5 at test level 5 and the stability tests described in BS 4875-6, except that in the vertical impact test rectangular tops shall also be impacted 10 times at test level 5 as close as possible to the corner and 10 times at test level 5 at their geometric centre.
42、For non-rectangular tables, see 4.5.3.3. 4.5.3.3 When a “longest span” (see BS 4875-5) does not exist, for example as in a round table, the “centre of the edge of the longest span” shall be a point on the periphery as far away from points of support as possible. 5 Marking 5.1 Where this British Stan
43、dard requires glass that complies with BS 6206 class A, B or C the glass shall be marked in accordance with BS 6206. 5.2 Tables or trolleys shall be clearly marked with the following information either permanently or on an adhesive label which cannot be removed without destroying the label: a) the n
44、umber and date of this British Standard, i.e. BS 7376:19901); b) the furniture manufacturers or suppliers (i.e. agent, importer or retailer) name and address; c) a means of identifying the item of furniture, for example the model number, and batch number or date of manufacture; d) details of the gla
45、ss incorporated into the table or trolley, i.e. nominal thickness, whether annealed, laminated, film backed or toughened, and whether or not it complies with BS 6206 class A, B or C; e) the following statement: “If the glass is chipped or broken replace with glass of the type described on this label
46、. Consult the furniture manufacturer, retailer, or agent with regard to obtaining a manufacturing specification of shape for replacement glass quoting the model number, and batch number or date of manufacture of the table or trolley”. This label shall be applied by the furniture manufacturer. NOTE 1
47、Where possible this label should not be applied to glass components. NOTE 2The label should not be removed by retailers or by persons delivering the table or trolley. NOTE 3It is important for the label to be visible at point of sale and visible on receipt by the consumer. 5.3 Furniture manufacturer
48、s shall give additional information concerning the use and care of the table or trolley in an instruction leaflet or swing ticket, see 5.4 and 5.5. 5.4 For tables or trolleys that do not contain a heating device the additional information described in 5.3 shall include the following: “WARNING a) Do
49、not place very hot or very cold items on the glass surface(s) unless adequately thick table mats are used to prevent such items from coming into contact with the glass. b) Do not sit or stand upon the glass surface(s). c) Do not use the glass as a chopping surface. Do not strike the glass with hard or pointed items. d) When cleaning glass panels use a damp cloth or leather with washing up liquid or soft soap if necessary; do not use washing powders or any other substances containing abrasives since these substances scratch glass.” Nominal thicknessTolerance on nomi