1、BRITISH STANDARD BS 7669-3: 1994 Vehicle restraint systems Part 3: Guide to t he installation, inspection and repair of safety fencesBS7669-3:1994 This British Standard, having been prepared under the direction of the Technical Committee B/509, was publishedunder the authority ofthe Standards Board
2、and comesinto effect on 15 September1994 BSI 04-1999 The following BSI references relate to the work on this standard: Committee reference B/509/12 Draft for comment 90/14988 DC ISBN 0 580 22178 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted
3、 by Technical Committee B/509, Road equipment, to Subcommittee B/509/12, Vehicle safety fences and barriers, upon which the following bodies were represented: Association of Safety Fencing Contractors British Cement Association British Steel Industry County Surveyors Society Department of Transport
4、(Transport Research Laboratory) Fencing Contractors Association Fencing Industries Association Institution of Civil Engineers Institution of Highways and Transportation Royal Society for the Prevention of Accidents The Highways Agency of the Department of Transport Amendments issued since publicatio
5、n Amd. No. Date CommentsBS7669-3:1994 BSI 04-1999 i Contents Page Committees responsible Inside front cover Foreword iii Section 1. General 1.1 Scope 1 1.2 References 1 1.3 Definitions 1 1.4 Health and safety 1 1.5 Dealing with services 1 1.6 Setting out 1 1.7 Achievement of torque and tension value
6、s 2 Section 2. Installation procedures for erection of new safety fences 2.1 Tensioned corrugated beam 4 2.2 Untensioned corrugated beam 14 2.3 Open box beam 17 2.4 Rectangular hollow section beam 27 2.5 Wire rope safety fence 31 Section 3. User guide to inspection of new and in-service safety fence
7、s 3.1 General 36 3.2 Procedure for adding existing safety fences to an inspection programme 36 3.3 Routine inspection programme 38 3.4 Detailed inspection programme 38 3.5 Other recommendations 54 Section 4. Repair of safety fences 4.1 General 59 4.2 Scope of repair work 59 4.3 Procedure for repairs
8、 61 Section 5. Transportation and storage of materials 5.1 Delivery 63 5.2 Handling 63 5.3 Storage/packing 63 Section 6. Training 6.1 Training courses 64 6.2 National register 64 Annex A (informative) Quality assurance 65 Annex B (informative) Post foundation test 68 Annex C (normative) List of draw
9、ings 75 Figure 1 Beam/rope height illustrations for new installations 3 Figure 2 Single sided tensioned corrugated beam (verge) 5 Figure 3 Tensioned corrugated beam (TCB) lap joint assembly arrangements 8 Figure 4 Double sided tensioned corrugated beam (central reserve) 10 Figure 5 Tensioned corruga
10、ted beam full height anchorages 13 Figure 6 Untensioned corrugated beam (verge) 15 Figure 7 Single sided open box beam (verge) 18 Figure 8 Connecting bolt detail for open box beam 20 Figure 9 Double sided open box beam (central reserve) 22BS7669-3:1994 ii BSI 04-1999 Page Figure 10 Double rail, sing
11、le sided open box beam (verge) 25 Figure 11 Rectangular hollow section,100mm 100mm (verge) 28 Figure 12 Rectangular hollow section,200mm 100mm (verge) 29 Figure 13 Wire rope safety fence (central reserve) 32 Figure 14 Wire rope tension meter 34 Figure 15 Inspection procedures in relation to approved
12、 practices 36 Figure 16 Planned inspection and maintenance flow chart 37 Figure 17 Frequency of safety inspections 39 Figure 18 Example of a routine inspection form 40 Figure 19 Frequency of detailed inspections 41 Figure 20 Questionnaire form for a detailed inspection of a tensionedcorrugated beam
13、safety fence 42 Figure 21 Questionnaire form for a detailed inspection of an untensioned corrugated beam safety fence 45 Figure 22 Questionnaire form for a detailed inspection of an open box beam safety fence 47 Figure 23 Questionnaire form for a detailed inspection of a tensioned rectangular hollow
14、 section safety fence 48 Figure 24 Questionnaire form for a detailed inspection of a wire rope safety fence 52 Figure 25 Set-back and clearance adjacent to structures (verge) 56 Figure 26 Set-back and clearance adjacent to structures (central reserve) 57 Figure A.1 Example of a form for notification
15、 of complaints 66 Figure A.2 Example of a form for written confirmation of verbal instructions 67 Figure B.1 Pull mode100 32 and110 50 “Z” section steel posts 69 Figure B.2 Push mode100 32 and110 50 “Z” section steel posts 70 Figure B.3 Pull mode125 90 “Z” section steel posts 71 Figure B.4 Push mode
16、125 90 “Z” section steel and150 150 timber posts 72 Figure B.5 Safety fence post foundation test results 74 Table 1 Torque for single sided tensioned corrugated beam 7 Table 2 Torque for double sided tensioned corrugated beam 12 Table 3 Tension for wire rope safety fence 35 Table 4 Measurement of cl
17、earance from fixed objects to safety fence 55 Table 5 Training modules for safety fence erectors 64 List of references Inside back coverBS7669-3:1994 BSI 04-1999 iii Foreword This Part of BS7669 has been prepared under the direction of Technical Committee B/509 Road Equipment. Over the last25 years
18、the Department of Transport, the Transport Research Laboratory, British Standards Institution and other organizations have been involved in research, testing, design and the preparation of specifications and standards for vehicle restraint systems such as safety fences, barriers and bridge parapets.
19、 Much of this work has been published in the form of Transport Research Laboratory reports, drawings, specifications and standards. Over recent years, particularly since the introduction of quality assurance schemes for both the manufacture of components and the erection of safety fences and parapet
20、s, the need for additional advice, guidance and background information has been highlighted. In1988 the Department of Transport and British Standards Institution agreed to the preparation of a comprehensive British Standard or Reference Manual on vehicle restraint systems. A steering group of repres
21、entatives from the British Standards Institution, Department of Transport and Transport Research Laboratory was formed to supervise the project and the following terms of reference were formulated: “To prepare the draft of a comprehensive document on safety fences, barriers and bridge parapets cover
22、ing research and development, design, specification, manufacture, installation, repair and maintenance.” It was decided to split the Reference Manual into several Parts and the following groups were formed: a) Working Group 1 Part 1 (in preparation), dealing with the fundamentals of safety fences, b
23、arriers, parapets and transitions b) Working Group 2 Part 2 (in preparation), dealing with the specification and layout of safety fences and barriers c) Working Group 3 Part 3, dealing with the installation, inspection and repair of safety fences d) Working Group 3 Part 4 (in preparation), dealing w
24、ith the installation, inspection and repair of safety barriers e) Working Group 4 Part 5 (future work), dealing with all aspects of bridge parapets A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct
25、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 to iv, pages1to 76, an inside back cover and a back cover. This standard has been updated (see copyright d
26、ate) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover.iv blankBS7669-3:1994 BSI 04-1999 1 Section 1. General 1.1 Scope This Part of BS7669 provides guidance on the installation and erection procedures for vehicle safety fences. It is al
27、so designed as a follow-on to in-service inspection and for use following damage to fences. NOTEThis guide includes supplementary commentaries to assist in its use and understanding. 1.2 References 1.2.1 Normative references This Part of BS7669 incorporates, by reference, provisions from specific ed
28、itions of other publications. These normative references are cited at the appropriate points in the text and the publications are listed on the inside back cover. Subsequent amendments to, or revisions of, any of these publications apply to this Part of BS7669 only when incorporated in it by updatin
29、g or revision. 1.2.2 Informative references This Part of BS7669 refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made to the latest editions. 1.
30、3 Definitions For the purposes of this Part of BS7669 the definitions given in the following Parts of BS6579 apply: BS6579-1:1988, BS6579-3:1988, BS6579-4:1990, BS6579-5:1986, BS6579-6:1988, and BS6579-7:1989. 1.4 Health and safety 1.4.1 The investigation and implementation of safety fence projects,
31、 including inspection and repair works, require personnel to work on the highway. All personnel including those dealing with the design and supervision functions should seek to ensure that safe working practices can be achieved and adopted at all times. No operation should cause danger to employer,
32、employee, contractor, subcontractor or any member of the public. Inconvenience should be kept to the minimum by careful preplanning of the works. The contractor should ensure that the Engineer is provided with the name of the contractors nominated representative who will have site management respons
33、ibility for the safety fence work. 1.4.2 Publications available on safety include: a) Health and Safety at Work etc. Act19741; b) Traffic Signs Manual Chapter8, specifically, Traffic Safety Measures and Signs for Roadworks and Temporary Situations 2; c) Safety at Roadworks, Notes for Guidance 3; d)
34、Planning for Safety Guidance Notes for the Health and Safety of Workers at In-service Motorway Roadworks Sites 4; e) Control of Substances Hazardous to Health Regulations,1988, as amended by SI1990 No.2026,19905; f) Construction (Lifting Operations) Regulations19616; g) Construction (General Provisi
35、ons) Regulations19617. 1.4.3 The Engineer, contractor and employer responsible for the project should ensure compliance with the above guidance/manuals whereby problems can be minimized by consideration of items such as: a) interference with the public utility apparatus or other underground services
36、 national/local Highway Authority and Utilities Committee (HAUC) arrangements; b) implementation of health and safety manuals protective clothing, head, limb, lungand eye protection, safe working practices (including materials); c) the general needs of the public clear signing, maintenance of traffi
37、c flow, protection of workers and night/weekend working; d) arrangements made for dealing with emergencies contact with local emergency services. 1.5 Dealing with services Before any work is commenced or marking pins are driven through the highway surface, details of all underground services and equ
38、ipment should be obtained and shown on the working drawings. Where necessary, services may need to be diverted by the appropriate authority to accommodate the agreed safety fence layout. In all cases, the service authority should mark out the position of their services on the ground using the agreed
39、 HAUC colour code system, prior to any safety fence work commencing. 1.6 Setting out Before safety fence erection work commences, the engineer should agree the setting out for: a) terminal sections/flares; b) straight and curved safety fences; c) the type of safety fence, including post and foundati
40、ons (and antiglare screen fencing fixings, if specified) in relation to all locations;BS7669-3:1994 2 BSI 04-1999 d) the location of tensioner assemblies, adjuster assemblies, expansion assemblies and expansion joints; e) the location of reinforcement (preferably utilizing a cover meter) and waterpr
41、oofing materials where surface-mounted posts are to be installed; f) the beam/rope height (seeFigure 1). The engineer should also ensure that posts do not coincide with underground chambers, services, manhole covers etc., especially where post spacing is at half standard centres. 1.7 Achievement of
42、torque and tension values Torque should be measured with a calibrated torque wrench in accordance with BS6703:1988. Tension in a wire rope should be measured with a calibrated rope tension indicator. COMMENTARY. Instruments should be calibrated at least annually.BS 7669-3:1994 BSI 04-1999 3 *NOTEIn
43、the “up to 1500” category measurement is from carriageway level not top of kerb Figure 1 Beam/rope height illustrations for new installationsBS7669-3:1994 4 BSI 04-1999 Section 2. Installation procedures for erection of safety fences 2.1 Tensioned corrugated beam 2.1.1 Single sided tensioned corruga
44、ted beam (Figure 2) 2.1.1.1 Mark out a) Mark out a datum and establish the set-back. COMMENTARY. On finished wearing course, for example. Alternatively the datum could be a bridge parapet, etc. b) Mark out connection between types of safety fence. c) Mark out flared ends. d) Mark out anchorages. COM
45、MENTARY. This should be done relative to bridge parapet, direction of safety fence or expansion joint anchorage. e) Mark out types of posts. 2.1.1.2 For driven posts a) Establish post centre referenced from the datum. COMMENTARY. Where a non-standard beam is authorized, post centre should be confirm
46、ed with the Engineer. b) Establish height datum. c) Ensure that post is the correct type. d) Ensure that the radiused edge of post faces oncoming traffic. COMMENTARY. Line of beams may be laid out along the setting out line as a guide for the post-driving rig provided care is taken to avoid damage t
47、o the beams. e) Drive post to specified height. COMMENTARY. One method of achieving this is by sighting onto a traveller. 2.1.1.3 Concrete foundations a) Establish post centre referenced from the datum and excavate foundation. Dispose of excess arisings. COMMENTARY. Ensure that the drawing and the s
48、pecification for type of foundation are as prescribed by the client and confirm whether post is to be placed into a galvanized socket. b) Place concrete, vibrate and compact. c) Ensure that post is the correct type. d) Ensure that radiused edge of post faces oncoming traffic. e) Set post and/or sock
49、et and reinforcing ring in wet concrete to the specified height, set-back and post centre. COMMENTARY. Ensure that post and/or socket and reinforcing ring remain in the correct position. f) Recompact concrete. Slope concrete away from post/socket to prevent formation of corrosion pockets. Finish to level and cure. g) Install post in socket and fill void with a non-setting passive filler to a level slightly above the top of the socket. 2.1.1.4 Filter drain
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