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1、BRITISH STANDARD BS 7950:1997 Incorporating Amendments Nos. 1, 2 and 3 Specification for enhanced security performance of windows for domestic applications ICS 91.060.50 ? Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:48:02 GMT+00:00 2007, Uncontrolled Copy
2、, (c) BSI BS 7950:1997 This British Standard, having been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 November 1997 BSI 2007 The following BSI references relate to the work o
3、n this standard: Committee reference B/538/1 Draft for comment 96/103000 DC ISBN 0 580 28948 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee B/538, Doors, windows, shutters, hardware and curtain walling, to Subcommittee
4、 B/538/1, Windows, upon which the following bodies were represented: Association of Builders Hardware Manufacturers British Plastics Federation British Wood Preserving and Damp-proofing Association British Woodworking Federation Centre for Window and Cladding Technology Construction Fixings Associat
5、ion Consumer Policy Committee of BSI Council for Aluminium in Building Department of the Environment (Building Research Establishment) Flat Glass Manufacturers Association Glass and Glazing Federation Guild of Architectural Ironmongers Health and Safety Executive LHC Building Components and Services
6、 National House Building Council Royal Institute of British Architects Society of Chief Architects of Local Authorities Society of Surveying Technicians Steel Window Association Timber Research and Development Association Amendments issued since publication Amd. No.DateComments 1428930 July 2003Addi
7、tion of 3.12 and revision of Annex A 1566618 November 2005Removal of limitation to casement and tilt/turn windows only, addition of top swing windows to Annex A drawings and Annex B table 28 February 2007To address issues relating to vertical sliding windows 16982 Licensed Copy: London South Bank Un
8、iversity, London South Bank University, Thu Mar 01 06:48:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 7950:1997 BSI 2007i Contents Page Committees responsibleInside front cover Forewordii Introduction 1 1Scope 1 2Normative references 1 3Definitions 2 4Sample selection 3 5Testing 3 6Apparatus 4 7
9、Performance requirements 4 Annex A (normative) Test methods 17 Annex B (normative) Standard loading cases Annex C (normative) Loading sequence Table B.1 Standard loading cases 25 Table C.1 Loading point which coincides with a hardware point 26 Table C.2 Loading point which does not coincide with a h
10、ardware point 26 Figure 1 Flow chart of test procedures 5 Figure 2 Typical test arrangement 6 Figure 3 Test sample mounting 7 Figure 4 Parallel-to-plane loading: along the edge 8 Figure 5 Parallel-to-plane loading: at right angles to the edge 9 Figure 6 Parallel-to-plane loading: at a mullion or tra
11、nsom 10 Figure 7 Perpendicular-to-plane loading 11 Figure 8 Typical test bracket 12 Figure 9 Typical outer frame support 13 Figure 10 Typical mullion and transom support 14 Figure 11 Typical loading pad 15 Figure 12 Typical loading bridge 16 Figure A.1 Typical installation of test window into timber
12、 sub-frame 22 Figure A.2 Typical loading sequences 23 List of references 27 25 26 Figure A.3 Loading configuration for a typical vertical sliding window 24 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:48:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 795
13、0:1997 ii BSI 2007 Foreword This British Standard has been prepared under the direction of Subcommittee B/538/1. It supersedes PAS 011:1994, which is withdrawn. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.
14、 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, pages 1 to 27 and a back cover. The BSI copyright notice displayed in this document indicates when the documen
15、t was last issued. Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:48:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 7950:1997 BSI 2007 Introduction The concept of “enhanced security” in this specification is based upon a relationship between resistance to
16、forced entry by human intervention techniques as used by an opportunist intruder and resistance to entry under mechanical loading. This relationship has been identified following an extensive test programme conducted on a range of windows. It is acknowledged that in some cases the assessment of the
17、enhanced security characteristics of windows by predetermined mechanical loading alone may not give a suitable assessment of its resistance to human attack. To avoid this situation the loading test is supplemented with manipulation testing which it is considered cannot be replicated mechanically. It
18、 is intended that this should be an evolving specification reflecting current design requirements and intrusion techniques. Accordingly, it will be subject to review and amendment as necessary. This specification deals with the enhanced security performance of casement, top swing, vertical sliding a
19、nd tilt/turn windows for domestic applications. In most cases other characteristics will also require consideration, for example, safety, means of escape, weathertightness and mechanical performance. 1 Scope This British Standard specifies test methods and acceptance criteria applicable to domestic
20、casement, top swing, vertical sliding and tilt/turn windows which provide enhanced security against unauthorized forced entry. It does not purport to provide a means of assessing total security against unauthorized entry. It is applicable to new windows as manufactured and prior to installation. It
21、is applicable to windows of any material or combination of materials including any hardware covering single and multilight configurations. The ability to gain entry by the breaking of glazing or infill panels is not assessed in this specification. Guidance should be sought into the security of glazi
22、ng. It is applicable to windows with key unlocking hardware. It is also applicable to windows with other than key unlocking hardware when fitted with laminated glass. For the purpose of this standard restrictors are not considered as part of the locking system; such devices are rendered inoperative
23、prior to test. This standard is only applicable to a complete window assembly or range of windows with a specific range of components. It applies to the following window types: a) casement: side hung (open-out and open-in), top hung (open-out), bottom hung (open-in); b) tilt/turn and turn/tilt; c) f
24、ixed light and dummy vent; d) top swing; e) vertical sliding. Compliance with this standard cannot be claimed in respect of individual component parts. 2 Normative references This British Standard incorporates, by dated or undated reference, provisions from other publications. These normative refere
25、nces are made at the appropriate places in the text and the cited publications are listed on the inside back cover. For dated references, only the edition cited applies; any subsequent amendments to or revisions of the cited publication apply to this British Standard only when incorporated in the re
26、ference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 1 Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:48:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 7950:1997 2 BSI
27、2007 3 Definitions For the purposes of this British Standard, the following definitions apply. 3.1 component failure 3.1.1 primary component failure a perpendicular-to-plane deflection of 50 mm or greater NOTE Applicable to a loading point that coincides with a hardware point. 3.1.2 secondary compon
28、ent failure a perpendicular-to-plane deflection of 50 mm or greater followed by an increase in perpendicular-to-plane deflection with no further increase in applied perpendicular-to-plane load NOTE Applicable to a loading point that has previously exhibited primary component failure or to a loading
29、point that does not coincide with a hardware point. 3.2 entry 3.2.1 for windows with key unlocking hardware on all opening lights. The creation of an aperture through which a 500 mm long cylindroid with an elliptical section of 225 mm minor and 380 mm major diameters can pass freely NOTE This simula
30、tes the passage of an intruders body. 3.2.2 for windows with other than key unlocking hardware on any opening light. The creation of an aperture through which a 500 mm long cylinder of 25 mm diameter can pass freely, or an existing aperture through which this body can pass NOTE This simulates the pa
31、ssage of a tool to release the locking mechanism. 3.3 glazing the glass or infill medium 3.4 key unlocking hardware hardware that requires a removable key to effect the unlocking function NOTE The locking function may be effected with or without the key. 3.5 opening corners free corners opposite the
32、 hinge side 3.6 opening face leading face of a vent when opened, i.e. the exterior face of an open-out vent and the interior face of an open-in vent 3.7 plane plane of the glazing 3.8 vent moveable individual glazed unit of a window 3.9 dummy vent vent which is permanently fixed in the closed positi
33、on 3.10 fixed light glazing that is permanently retained within the outer framing members of the window Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:48:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 7950:1997 BSI 20073 3.11 range group of windows with de
34、fined limits of size, type, configuration, hardware, glazing, construction and security features 3.12 technique combination of tools and location NOTE Any change in either the tools or the location constitutes a new technique. 4 Sample selection Two identical windows shall be selected, one for manua
35、l and one for mechanical testing. Sample pairs shall be selected by the test authority and agreed with the supplier/manufacturer. Where a range of windows is to be considered the number and type of samples chosen shall be representative of the product range which the manufacturer/supplier wishes to
36、have assessed. The samples selected shall include the most adverse and vulnerable aspects of the design, size and configuration. The following list, which is not exhaustive, identifies some of the features that may influence the security of the window: a) maximum distance between points which secure
37、 the vent to the outer frame (including dummy vents); b) glazing methods to cover internal, external and channel glazing systems, types of glazing beads, gaskets, security clips, tapes and glazing blocks; c) single and/or double glazing, including thickness; d) reinforcements used in any system; e)
38、hardware: locking and hinge options, fixings and changes with respect to vent size. For the purpose of these tests only, all glass supplied in samples shall be toughened to meet class A of BS 6206. 5 Testing 5.1 Test methods The methods of test shall be as specified in Annex A. 5.2 Assessment Assess
39、ment follows the steps summarized as a flow chart shown in Figure 1. 5.3 Test report The test report shall include at least the following information. a) A concise description of the window including at least the following information, checked before the test: 1) manufacturers name and specific prod
40、uct identification; 2) types of opening lights; 3) materials and, if applicable, their surface treatment; 4) overall width and overall height; 5) method of frame jointing; 6) framing, profile and reinforcement details where applicable; 7) types of beading, gaskets, methods of glazing and any securit
41、y feature present in the glazing rebate; 8) type and thickness of glass and overall thickness of glazing unit; 9) types and details of hardware; Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:48:02 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 7950:1997 4 BS
42、I 2007 10) types and details of hardware fixings; 11) a detailed drawing(s) of the window elevation viewed from the outside, including the positions of the hardware. b) The definition of the window range (see 3.11) applicable to the report including size limitation and window configuration. c) The r
43、esults obtained during each test. d) Diagram of the test apparatus or its reference. e) Laboratory ambient air temperature at the time of test. f) Testing organization, date of test, test engineer and any witnesses. g) A statement that the results are valid only for the conditions under which the te
44、st was conducted and for the specific window range (see 3.11). h) A summary of the result and assessment for the range. 6 Apparatus The test apparatus shall support the sample rigidly. The test frame or additional support shall not overlap the sample frame by more than 10 mm. For both mechanical and
45、 manual tests the sample shall be installed vertically in the test apparatus and secured to prevent movement. A suitable test arrangement is shown in Figure 2. When conducting the manual test the apparatus shall allow for free unrestricted access to the exterior face of the window with the sample mo
46、unted at a height of 800 mm 100 mm from the working floor level to the underside of the sill or sub sill. The outer frame of the window shall be fitted flush with the outer frame of the test apparatus (see Figure 3). When carrying out the mechanical test, the test apparatus shall be provided with th
47、e means of applying and maintaining the loads parallel and perpendicular to the plane of the test sample to within a measured accuracy of 2 %. Perpendicular-to-plane loads shall be controlled to an accuracy of 5 %. In the case of vertical sliding windows parallel-to-plane loads applied in the direct
48、ion of normal opening shall also be controlled to an accuracy of 5 %. Other parallel-to-plane loads shall be controlled to an accuracy of +2 % to 10 %. Typical loading configurations are shown in Figure 4, Figure 5, Figure 6 and Figure 7. A suitable bracket as shown in Figure 8 shall be used to appl
49、y the loads. The apparatus shall provide frame support to prevent perpendicular-to-plane movement of the samples outer frame with respect to the timber subframe. The supported area shall be a minimum of 200 mm in length and 7.5 mm 2.5 mm wide measured from the outer edge of the profile as shown in Figure 9. In addition the apparatus shall provide frame support to prevent parallel-to-plane movement of the timber subframe. The apparatus shall also provi