BS MA 78-1978 Specification for aluminium shore gangways《铝制靠岸跳板规范》.pdf

1、BRITISH STANDARD MARINE SERIES CONFIRMED DECEMBER1998 BS MA 78:1978 Specification for Aluminium shore gangways UDC 629.12.046:699.71BSMA78:1978 This BritishStandard, having been prepared under the directionof the Shipbuilding andMarine Standards Committee, was published underthe authority of theExec

2、utive Board on 28April1978 BSI02-2000 The following BSI references relate to the work on this standard: Committee reference SME/2 Draft for comment76/74018DC ISBN 0 580 10036 7 Foreword This BritishStandard has been prepared under the direction of the Shipbuilding and Marine Standards Committee and

3、is based on a proposal of the British Ship Research Association. Ships require a means of ship to shore access which can be safely used by all persons. The aluminium shore gangway provides a lightweight convenient structure which can be used in a horizontal or inclined position up to an angle of30 f

4、rom the horizontal dependent on tidal or freeboard conditions. Special designs of step allow for a more severe angle to be employed than the30 specified. The gangways described in this standard are not intended to carry wheeled traffic such as loaded trolleys, etc. A lightweight gangway for “first p

5、erson ashore” is described in Appendix A. NOTEUsers of this BritishStandard should note that while observing the requirements of the standard they should at the same time ensure compliance with any statutory requirements, rules and regulations as may be applicable to the individual ship concerned. A

6、 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

7、 front cover, an inside front cover, pagesi andii, pages1 to10 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. Amendments issued since publication Amd. No. Date of

8、 issue CommentsBSMA78:1978 BSI 02-2000 i Contents Page Foreword Inside front cover 1 Scope 1 2 References 1 3 Definitions 1 4 Types of gangway 1 5 Materials 1 6 Dimensions 1 7 Design and construction 2 8 Quality of manufacture 4 9 Acceptance tests 4 10 Marking 4 11 Inspection 4 12 Preparation for de

9、spatch 7 13 Information to be supplied by the purchaser 7 14 Information to be supplied by the manufacturer 7 Appendix A Rigid narrow decking two handrail gangway 8 Appendix B Method of test for initial sag and deflection of gangways 10 Figure 1 General arrangement of type A gangway 5 Figure 2 Gener

10、al arrangement of type B gangway 6 Figure 3 General arrangement of type C gangway 9 Table 1 Materials 2 Table 2 Nominal sizes and stowage dimensions of typesAandB(fixedhandguides) 3 Table 3 Nominal sizes and stowage dimensions oftypesAandB(hingedorportable handguides) 4 Table 4 Nominal sizes and sto

11、wage dimensions of type C (fixed handguides) 8 Table 5 Nominal sizes and stowage dimensions of typeC(hingedorportablehandguides) 8ii blankBSMA78:1978 BSI 02-2000 1 1 Scope This BritishStandard specifies requirements for three types of aluminium ship to shore gangway which are only for the use of per

12、sons to embark or disembark safely. 2 References This standard makes reference to the following standards publications BS729, Hot dip galvanized coatings on iron and steel articles. BS1161, Aluminium and aluminium alloy sections. BS1470, Wrought aluminium and aluminium alloys for general engineering

13、 purposes plate, sheet and strip. BS1473, Wrought aluminium and aluminium alloys for general engineering purposes rivet, bolt and screw stock. BS1474, Wrought aluminium and aluminium alloys for general engineering purposes bars, extruded round tubes and sections. BS1486, Lubricating nipples Part1: L

14、ubricating nipples and adaptors for use on machinery and vehicles. BS2052, Ropes made from coir, hemp, manila and sisal. BS2901, Filler rods and wires for gas-shielded arc welding Part4: Aluminium and aluminium alloys and magnesium alloys. BS4360, Weldable structural steels. BS4928, Man-made fibre r

15、opes Part1: Polyproplene ropes (3-strand hawser laid and 8-strand plaited). BS4942, Short link chain for lifting purposes Part2: Grade M non-calibrated chain. CP118, The structural use of aluminium. 3 Definitions For the purposes of this BritishStandard the following definitions apply. 3.1 gangway a

16、 bridge structure to allow safe embarkation and disembarkation from ship to shore or access to another ship 3.2 side stringers the longitudinal strength members of the gangway to which the cross-members, stanchions, roller or wheels and the lifting lugs etc. are attached 3.3 cross-members the bars,

17、angles or hollow sections which hold the side stringers in position, and provide support for the decking 3.4 decking flat topped corrugated section or plate 3.5 footsteps the bars, rounded hollow sections or hardwood battens fitted proud of the decking or deck plate level to give better foot grip wh

18、en the gangway is inclined from the horizontal position 3.6 hand and intermediate guides the tubes, bars, ropes or chains which protect people from falling from the gangway 3.7 nominal size the length of the gangway between points of support (seeFigure 1, Figure 2 and Figure 3) 4 Types of gangway Th

19、ree types of gangway are specified in this standard; they are as follows: a) type A, rigid-decking two-handrail gangway (seeFigure 1); b) type B, hinged two-handrail gangway (seeFigure 2); c) type C, rigid-narrow-decking two-handrail gangway (seeFigure 3 and Appendix A). NOTEThe longer type A gangwa

20、ys with hinged or portable handguides may be made up of sections connected by rigid jointing. For gangways assembled in this way, the preferred number of sections is given in Table 3. 5 Materials The materials shall comply with the requirements of Table 1. Other materials may be used provided they h

21、ave equivalent strength and are compatible with the structural use of aluminium as specified in CP118. 6 Dimensions 6.1 Gangways shall be designed to the nominal sizes shown in Table 2 or Table 3 for types A and B and Table 4 and Table 5 for type C. 6.2 The minimum width between side stringers shall

22、 be as indicated in Figure 1, Figure 2 and Figure 3.BSMA78:1978 2 BSI 02-2000 7 Design and construction 7.1 Design parameters 7.1.1 Design loading. The assembly, comprising side stringers, cross-members and decking shall be designed to withstand a uniform deck loading of4000N/m 2 . 7.1.2 Factor of s

23、afety. The allowable stress used in the design of the gangway with the loading specified in7.1.1 shall be determined by applying a factor of safety of2 on the0.2% proof stress of aluminium. 7.1.3 Construction. The design and construction shall be in accordance with CP118. 7.2 Side stringers. Side st

24、ringers shall be constructed from welded, extruded hollow or rolled sections, or from plate or from any combination of these. 7.3 Cross-members. Cross-members attached to the side stringers shall be capable of supporting the deck or deck plates. 7.4 Decking. The decking shall comprise either continu

25、ous-flat-topped longitudinal corrugated section or individual flat-plate surfaces, which may have a non-slip coating. 7.5 Footsteps. Footsteps of50mm 50mm hardwood shall be secured to the top of the decking at regular centre to centre intervals of not less than400mm. Alternatively, the footsteps may

26、 be constructed from extruded aluminium sections secured to the stringers or the decking, and raised above decking level by a minimum of30mm, in which case the minimum longitudinal length of flat decking between adjacent footsteps shall be350mm. Table 1 Materials Reference a Component Material BS nu

27、mber Remarks 1 Side stringers Aluminium BS 1161 BS 1470 BS 1473 BS 1474 H30 alloy 2 Cross-members Aluminium BS 1470 BS 1474 H30 alloy 3 Decking or deck plates Aluminium BS 1470 orBS1474 H30 alloy 4 Footsteps Aluminium, Hardwood BS 1474 H30 alloy 5 Rollers Wheels Carbon steel Carbon steel with solid

28、tyres BS 4360 Grade43A Ribbed or flat tread 6 Stanchions Aluminium Carbon steel BS 1161 orBS 1474 BS 4360 H30 alloy Grade43A 7 Handguides: handrail handrope handchain handwire, plastic coated Aluminium section Sisal or manila Polypropylene Steel PVC coated guard-wire rope BS 1474 BS 2052 BS 4928 BS

29、4942-2 See7.7 Seenote to7.7 a) Galvanized 8 Securing device Sisal or manila Polypropylene Polypropylene staple fibre BS 2052 BS 4928-1 BS 4928-1 Seenote to7.7 a) 9 Toeboards Aluminium Hardwood BS 1474 H30 alloy a The reference numbers in this table refer to parts of Figure 1, Figure 2 and Figure 3.B

30、SMA78:1978 BSI 02-2000 3 7.6 Stanchions. Stanchions shall be constructed from carbon steel or aluminium to a height that complies with Figure 1, Figure 2 and Figure 3. They shall be fitted at regular intervals along the gangway, with a maximum permitted interval of1500mm. Stanchions shall be erected

31、 vertically with the gangway horizontal and shall be of one of the following types: a) fixed; b) hinged, with provision made to prevent inadvertent collapse; c) portable, with securement to prevent accidental displacement from the socket or base support. Galvanized stanchions, where specified, shall

32、 comply with the requirements of BS729. 7.7 Hand and intermediate guides. Hand and intermediate guides for the gangway shall be provided which comply with Figure 1, Figure 2 and Figure 3, and shall be of one of the following types. a) Continuous and adequately tensioned sisal, manila or polypropylen

33、e or plastic covered wire-rope of16mm minimum diameter. NOTEFor polypropylene ropes evidence is required from manufacturers that the rope is fully protected against actinic degradation to withstand two years exposure on a ship operating in or through the tropics. b) Galvanized steel chain provided w

34、ith adequate means of tensioning. c) Continuous rigid-aluminium-solid or hollow section for use with fixed or portable stanchions. d) Continuous rigid-aluminium-solid or hollow section for the handguides of hinged stanchions, with the intermediate guides as in7.7 a). 7.8 Toeboards. Toeboards, to a h

35、eight of at least150mm above the decking level, shall be fitted at each side of the gangway. 7.9 Roller or wheels. A roller or wheels of110mm minimum diameter shall be positioned at one end of the gangway. Rollers or wheels shall be self-lubricated or fitted with a lubricating nipple which complies

36、with the requirements of BS1486-1, and shall have guards provided for foot protection when the ship moves. 7.10 Securing devices. Suitable attachments shall be provided on both sides of the gangway in order to connect the securing devices (seeFigure 1, Figure 2 and Figure 3). 7.11 Lifting lugs. The

37、gangway shall be provided with four lifting lugs securely attached to the stringers and positioned to give an even lift. 7.12 Angle of use. The construction of the gangway shall allow for usage at any angle of inclination from the horizontal plane to30 from the horizontal. Table 2 Nominal sizes and

38、stowage dimensions of types A and B (fixed handguides) Nominal size Maximum stowage dimensions of uncrated gangways with fixed handguides, mm Maximum overall length Maximum overall width Maximum depth (fixed handguides) Type A Type B Type A Type B Type A Type B 3000 3750 3500 650 650 1400 Made up fr

39、om two nominal sizes. Use maximum depth dimensions for type A gangway for relevant sections 4500 5250 5000 650 650 1400 6000 6750 6600 650 650 1500 7500 8250 8100 650 650 1500 9000 9750 9600 650 650 1500 12000 12750 12600 800 800 1600 15000 15750 15600 800 800 1750 18000 18750 18600 800 800 1900 210

40、00 21750 21600 800 800 2050 24000 24750 24600 800 800 2200 27000 27750 27600 800 800 2400 30000 30750 30600 800 800 2600BSMA78:1978 4 BSI 02-2000 Table 3 Nominal sizes and stowage dimensions of types A and B (hinged orportablehandguides) NOTEIf greater angles of inclination are required, the purchas

41、er shall specify the maximum angle to the manufacturer. 8 Quality of manufacture 8.1 The assembly, comprising side stringers, cross-members, and decking, together with all ancillary fittings, shall be visibly free from defects and distortion. 8.2 All components shall be free from exposed rough or sh

42、arp edges likely to cause injury. 8.3 Preparation, welding, riveting or bolting of aluminium structures shall conform to the recommendations of CP118, in order that the permissible design stresses are not exceeded. Filler wire for welding shall comply with the requirements of BS2901-4. 9 Acceptance

43、tests The following tests shall be carried out at the manufacturers works. 9.1 Manufacturers type test. One gangway of each nominal size and type shall be tested in accordance with Appendix B and a test certificate made available to the purchaser on request. 9.2 Individual test. Each gangway shall b

44、e fully assembled with all fittings comprising the dead load (i.e.the fully erected gangway) and tested as follows: a) lifting by lifting lugs; b) measurement of initial sag (seeAppendix B); c) preparation for stowage and checking of stowage dimensions. 10 Marking Each gangway shall be permanently m

45、arked by means of a rating plate prominently displayed. The rating plate shall contain such information as is relevant to the gangway, including the following: a) manufacturers name or trade mark, type number and serial number; b) number of this BritishStandard i.e.BS MA78; c) type of gangway i.e.A,

46、 B or C; d) nominal size; e) maximum permitted angle of use. 11 Inspection 11.1 Gangways subjected to a type test shall be inspected to ensure that there are no signs of residual weakness or damage. 11.2 All gangways shall be visually checked to ensure that: a) there is no distortion of the side str

47、ingers; b) the decking or deck plates are adequately secured; c) the roller or wheels revolve freely; Nominal size Maximum stowage dimensions of uncrated gangways with hinged or portable handguides, mm Maximum overall length Maximum overall width Maximum depth (stanchions removed or folded flat) Typ

48、e A a Type B Type A Type B Type A Type B 3000 4500 6000 7500 9000 3750 5250 6750 8250 9750 3500 5000 6600 8100 9600 650 650 650 650 650 650 650 650 650 650 1 section 300 300 350 350 400 Made up from two nominal sizes.Use maximum depth dimensions for type A gangway for relevant sections 12000 15000 1

49、8000 12750 15750 18750 12600 15600 18600 800 800 800 800 800 800 2 sections 700 800 900 21000 24000 27000 30000 21750 24750 27750 30750 21600 24600 27600 30600 800 800 800 800 800 800 800 800 3 sections 1000 1100 1200 1300 a Stowed lengths may be shorter if rigid-joint extendable gangways are used. The preferred number of sections of type A gangways assembled in this way is shown in column6. BSMA78:1978 BSI 02-2000 5 d) if applicable, the stanchions, hand and intermediate guides can be easily erected in