1、BRITISH STANDARD AEROSPACE SERIES BS 2C 8:1988 ISO 7166:1985 (Superseding British Standard C 8) Specification for Rail and stud configuration for aircraft passenger equipment and cargo restraint ISO title: Aircraft Rail and stud configuration for passenger equipment and cargo restraint UDC 629.7.046
2、 219:684.434.7BS2C8:1988 This British Standard, having been prepared under the directionof the Aerospace Standards Committee, was published under the authority ofthe Board of BSI and comes intoeffect on 29 February 1988 BSI 11-1999 The following BSI references relate to the work on this standard: Co
3、mmittee reference ACE/57 Draft for comment 84/72725 DC ISBN 0 580 16518 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Aerospace Standards Committee (ACE/-) to Technical Committee ACE/57, upon which the following bodies were represent
4、ed: Association of Webbing Load Restraint Equipment Manufacturers British Airways British Caledonian Airways British Narrow Fabrics Association Civil Aviation Authority (Airworthiness Division) Ministry of Defence Society of British Aerospace Companies Limited Amendments issued since publication Amd
5、. No. Date of issue CommentsBS2C8:1988 BSI 11-1999 i Contents Page Committees responsible Inside front cover National foreword ii 0 Introduction 1 1 Scope and field of application 1 2 References 1 3 Dimensional requirements 1 4 Strength requirements 1 Figure 1 Rail 2 Figure 2 Stud fitting 3 Publicat
6、ions referred to Inside back coverBS2C8:1988 ii BSI 11-1999 National foreword This British Standard, published under the direction of the Aerospace Standards Committee, is a revision of British Standard C8:1969, which is withdrawn. It is identical with ISO7166:1985 “Aircraft Rail and stud configurat
7、ion for passenger equipment and cargo restraint”, published by the International Organization for Standardization (ISO). ISO7166 was produced as a result of international discussion in which the UK took an active part. Terminology and conventions. The text of the International Standard has been appr
8、oved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. The comma has been used as a decimal marker. In British Standards it is current p
9、ractice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. Cross-references. The Technical Committee has reviewed the provisions of ISO4170 and ISO4171, to which referen
10、ce is made in the text, and has decided that they are acceptable for use in conjunction with this standard. There are no corresponding British Standards to ISO4170 and ISO4171. NOTEThe latest revision of an Aerospace Series standard is indicated by a prefix number. A British Standard does not purpor
11、t 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 cov
12、er, pages i and ii, pages1to4, 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.BS2C8:1988 BSI 11-1999 1 0 Introduction This International Stand
13、ard specifies the geometry of aircraft floor rails which are normally set longitudinally into an aircraft floor structure. Seats, galleys, bulkheads and other removable or adjustable equipment are normally secured into the seat rails by means of studs. This concept is also widely used in the air car
14、go field for the restraint of cargo: the most frequent application being in the attachment of cargo nets to pallets (seeISO4170 and ISO4171). 1 Scope and field of application 1.1 This International Standard specifies the geometry and the partial dimensions of rails and studs used for securing passen
15、ger equipment and for cargo restraint, necessary to ensure interchangeability of these items. 1.2 Individual strength requirements will determine the complete rail shape, such as incorporating the standard section integrally into an I-beam extrusion. 1.3 The overall shape of the studs above the top
16、of the rail will depend upon the application. The upper portion may be cylindrical to fit into the tubular structure of a seat or galley unit. Alternatively, it may have a ring attached to serve as a tiedown point for a rope or strap. 1.4 The rail imparts loads in the upward, downward, sideward, for
17、ward and aft directions. Forward and aft loads are applied to the track by means of a “shear plug”, a part of the pin assembly (or structure to which the stud is joined) which engages in the rail notches 20,8mm (0.800in) in diameter, but this is not included in this International Standard. In the ca
18、se of seat attachment or similar application, the downward load is applied to the upper face of the rail by a fitting which is also part of the seat, but this is not included in this International Standard. 2 References ISO 4170, Interline air cargo pallet nets. ISO 4171, Interline air cargo pallets
19、. NOTEISO Recommendation R837, Aircraft seat rails and pins, provided only for single stud fittings. Furthermore, most of the worlds passenger aircraft, and virtually all cargo equipment, used rail and stud configurations based on the USA military specification MS.33601A. 3 Dimensional requirements
20、3.1 The dimensions and tolerances of the rail and studs shall conform toFigure 1 andFigure 2. 3.2 Sharp edges and corners shall be removed. 3.3 The stud fitting may have one pair of lips, formed by the diameter B, and, in this case, it is known as a single stud fitting. 3.4 Figure 2 shows a double s
21、tud fitting. Multiple stud fittings may have up to5pairs of lips (or5studs). 4 Strength requirements This International Standard is concerned only with the configuration of rails and studs. The load carrying capacity will be determined by the strength of the materials from which the items are manufa
22、ctured and by the strength of the structure to which they are attached.BS2C8:1988 2 BSI 11-1999 Dimension mm in A* 25,4 1.00 B 19,7 20,0 0.776 0.787 C 10,7 11,4 0.421 0.449 D 20,3 20,8 0.799 0.819 E 7,6 8,0 0.299 0.310 F 3,9 3,5 0.154 0.133 * Tolerance of 0,1 mm (0.004 in) on 1 pitch. G ref. 1,3 1,0
23、 0.051 0.039 Tolerance of 0,5 mm (0.020 in) on 100 pitches. 10,5 to 15,5 R 1 0,3 0,8 0.012 0.031 R 2 1,3 1,8 0.051 0.071 R 3 Full Full NOTE 1Diameter B and slot centreline D shall be coincident with slot centreline C to within 0,13 mm (0.005 in). NOTE 2All faces shall be within 0,5 of the specified
24、position relative to the upper surface of the rail. NOTE 3For low-weight or low-load applications dimensions E and F may be reduced by 0,76 to 1,02 mm (0.03 to 0.04 in) and the rail shall be specified accordingly as a “lightweight rail”. Figure 1 RailBS2C8:1988 BSI 11-1999 3 Dimension mm in A a 9,8
25、9,7 0.386 0.382 B a 18,8 18,3 0.740 0.721 C 3,3 3,2 0.130 0.126 D b 25,5 25,3 1.004 0.996 c 8,5 to 10,5 R 1 1,8 1,5 0.071 0.059 R 2 1,5 1,2 0.059 0.047 R 3 0,8 0,5 0.031 0.020 a Diameters A and B shall be concentric to within 0,13 mm (0.005 in). b The tolerance on successive D dimensions shall not b
26、e cumulative for multiple stud fittings. All studs shall be within 0,1 mm (0.004 in) of the specified position relative to the datum stud. c The angular variation for those surfaces defined by angle E shall be within 0,5 of the specified plane relative to the lower surface of the stud. Figure 2 Stud
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