OSI) International Standard 7166 INTERNATIONALORGANIZATIONFORSTANDARDIZATIONMEKAYHAPOAHAROAH3AOCTAHAPTWAWORGANISATIONINTERNATIONALEDE NORMALISATION Aircraft - Rail and stud configuration for passenger eguipment and cargo restraint Aeronefs - Fixation par rails et tétons des sieges de passagers et du fret First edition - 1985-08-15 UDC 629.7 ISO 7166-1985 (E) Ref. No. ISO7166-1985 (E) Descriptors:aircraft,aircraft equipment,rails,dimensions,shape. Pricebased on3pages fnfd"CGPOT rwintk1nfl Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern mental and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by least 75 % approval by the member bodies voting. International Standard ISO 7166 was prepared by Technical Committee ISO/TC 20, Aircraftandspacevehicles It cancels and replaces ISo Recommendation R 837-1968, of which it constitutes a technical revision. International Organization for Standardization, 1985 Printed in Switzerland INTERNATIONAL STANDARD ISO7166-1985(E) Aircraft - Rail and stud configuration for passenger eguipment and cargo restraint 0 Introduction In thecaseof seat attachment or similar application,the downward load is applied to the upper face of the rail by a This International Standard specifies the geometry of aircraft fitting which is also part of the seat, but this is not included in floor rails which are normally set longitudinally into an aircraft this International Standard. floor structure. Seats, galleys, bulkheads and other removable or adjustable equipment are normally secured into the seat rails by means of studs. 2 References This concept is also widely used in the air cargo field for the ISo 4170, Interline air cargo pallet nets. restraint of cargo:the most frequent application being in the attachment of cargo nets to pallets (see Is0 4170 and ISO 4171, Interline air cargo pallets. ISO 4171). NOTE-ISO Recommendation R 837,Aircraft seat rails and pins, pro vided only for single stud fittings. Furthermore, most of the world's passenger aircraft, and virtually all cargo equipment, used rail and stud Scope and field of application configurations based on theUSA military specification MS.33601A. 1.1 This International Standard specifies the geometry and 3 Dimensional requirements the partial dimensions of rails and studs used for securing passenger equipment and for cargo restraint,necessary to 3.1 The dimensions and tolerances of the rail and studs shall ensure interchangeabilityof these items conform to figures 1 and 2. 1.2Individual strengthrequirementswill determinethecom 3.2 Sharp edges and corners shall be removed. plete rail shape, such as incorporating the standard section integrallyintoanI-beam extrusion. 3.3The 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. 1.3 The overall shape of the studs above the top of the rail will depend upon the application. The upper portion may be 3.4 Figure 2 shows a double stud fitting. Multiple stud fit- tings may have up to 5 pairs of lips (or 5 studs). unit.Aiternatively, it may have a ring attached to serve as a tie- down point for a rope or strap. Strength requirements 1.4 The rail imparts loads in the upward, downward, sideward, forward and aft directions. Forward and aft loads are This International Standard is concerned only with the con- applied to the track by means of a "shear plug", a part of the figuration of rails and studs. The