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ISO 9788:2017

(Main)

Air cargo — Double stud tie-down fittings — Design and testing requirements

Air cargo — Double stud tie-down fittings — Design and testing requirements

ISO 9788:2017 specifies the geometry, performance and testing requirements for a double stud tie-down fitting assembly, having a load capacity of 22 250 N (5 000 lbf), when installed in rail or track conforming to ISO 7166. Other materials than those specified can alternatively be used, provided the performance and testing requirements of this document are complied with. Double stud tie-down fittings are intended to be used as either: a) loose items to be attached to an air cargo pallet's track or an aircraft's floor rail in order to constitute a tie-down arrangement together with cargo restraint straps meeting the requirements of ISO 16049-1 or cargo restraint slings (steel cables) meeting the requirements of ISO 20291-1, b) or permanently attached tie-down components of pallet nets meeting the requirements of ISO 4115 or ISO 4170. In this case, where deemed appropriate, the stud geometry can alternatively conform to ISO 7166, and the breaking strength requirement can be limited to the value necessary to meet the net's airworthiness approval/certification in accordance with ISO 21100. Single stud tie-down fittings are not covered by this document. They nevertheless can, where deemed appropriate, use the same stud geometry alternatively to the stud configuration specified in applicable ISO 7166.

Fret aérien — Ferrures d'arrimage à pion double — Exigences de conception et d'essais

General Information

Status
Published
Publication Date
30-Nov-2017
ICS
49.120 - Cargo equipment
Technical Committee
ISO/TC 20/SC 9 - Air cargo and ground equipment
Drafting Committee
ISO/TC 20/SC 9 - Air cargo and ground equipment
Current Stage
9093 - International Standard confirmed
Completion Date
30-Aug-2023
Ref Project

Relations

Revises
ISO 9788:1990 - Air cargo equipment — Cast components of double stud fitting assembly with a load capacity of 22 250 N (5 000 lbf), for aircraft cargo restraint
Effective Date
30-Jan-2016

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ISO 9788:2017 - Air cargo -- Double stud tie-down fittings -- Design and testing requirements
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INTERNATIONAL ISO
STANDARD 9788
Second edition
2017-12
Air cargo — Double stud tie-down
fittings — Design and testing
requirements
Fret aérien — Ferrures d'arrimage à pion double — Exigences de
conception et d'essais
Reference number
ISO 9788:2017(E)
©
ISO 2017

---------------------- Page: 1 ----------------------
ISO 9788:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 9788:2017(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 Configuration . 2
4.2 Materials . 5
4.3 Load requirements . 6
5 Certification and testing . 6
5.1 Certification . 6
5.2 Testing . 6
5.2.1 General. 6
5.2.2 Sampling — Cast components . 7
5.2.3 Load test . 7
5.2.4 Retests . 7
6 Designation . 7
7 Identification . 7
8 Quality control . 8
8.1 Design and production . 8
8.2 Operation . 8
Bibliography .10
© ISO 2017 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 9788:2017(E)

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, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles,
Subcommittee SC 9, Air cargo and ground equipment.
This second edition cancels and replaces the first edition (ISO 9788:1990), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— change in title to reflect the amended scope;
— expansion of scope to cover complete double-stud fittings, regardless of material used, instead of
only their cast components;
— new Figure 4, examples of ring shapes;
— drawing attention in 4.2.4 to zinc chromate’s toxicity; and
— addition of a new Clause 8 on Quality Control.
iv © ISO 2017 – All rights reserved

---------------------- Page: 4 ----------------------
ISO 9788:2017(E)

Introduction
This document specifies the design, performance and testing requirements for double stud tie-
down fittings intended to be used for cargo restraint on board civil transport aircraft. At the time of
publication, no formal Civil Aviation Authority approval (certification) procedure applicable to tie-
down fittings.
The civil aviation requirements referred to in this document are those concerning certification
of transport aircraft and appliances to be installed aboard them, and constitute the set of design
and operation requirements internationally agreed in application of International Civil Aviation
Organization (ICAO) Annexes 6, Operation of aircraft and 8, Airworthiness of aircraft, to the Convention
on International Civil Aviation. This document provides one means of compliance for double stud tie-
down fittings.
Throughout this document, the minimum essential criteria are identified by use of the key word “shall”.
Recommended criteria are identified by use of the key word “should” and, while not mandatory, are
considered to be of primary importance in providing safe restraint arrangements on board aircraft.
Deviation from recommended criteria should only occur after careful consideration and thorough
service evaluation have shown alternate methods to provide an equivalent level of safety.
Dimensions and tolerances are expressed in millimetres.
© ISO 2017 – All rights reserved v

---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 9788:2017(E)
Air cargo — Double stud tie-down fittings — Design and
testing requirements
1 Scope
This document specifies the geometry, performance and testing requirements for a double stud tie-
down fitting assembly, having a load capacity of 22 250 N (5 000 lbf), when installed in rail or track
conforming to ISO 7166.
Other materials than those specified can alternatively be used, provided the performance and testing
requirements of this document are complied with.
Double stud tie-down fittings are intended to be used as either:
a) loose items to be attached to an air cargo pallet’s track or an aircraft’s floor rail in order to
constitute a tie-down arrangement together with cargo restraint straps meeting the requirements
of ISO 16049-1 or cargo restraint slings (steel cables) meeting the requirements of ISO 20291-1,
b) or permanently attached tie-down components of pallet nets meeting the requirements of ISO 4115
or ISO 4170.
In this case, where deemed appropriate, the stud geometry can alternatively conform to ISO 7166, and
the breaking strength requirement can be limited to the value necessary to meet the net’s airworthiness
approval/certification in accordance with ISO 21100.
Single stud tie-down fittings are not covered by this document.
They nevertheless can, where deemed appropriate, use the same stud geometry alternatively to the
stud configuration specified in applicable ISO 7166.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 3951, Sampling procedures and charts for inspection by variables for percent nonconforming
ISO 5922, Malleable cast iron
ISO 6982, Metallic materials — Tensile testing
ISO 7166, Aircraft — Rail and stud configuration for passenger equipment and cargo restraint
ISO 10254, Air cargo and ground equipment — Vocabulary
ISO 16049-1:2013, Air cargo equipment — Restraint straps — Part 1: Design criteria and testing methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 10254 and the following apply.
© ISO 2017 – All rights reserved 1

---------------------- Page: 6 ----------------------
ISO 9788:2017(E)

ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http://
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