ISO 13799:2020

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 13799
ISO/TC 8/SC 4
Ships and marine technology —
Secretariat: SAC
Ship's mooring and towing fittings —
Voting begins on:
2020­05­27 Recessed bitts (casting type)
Voting terminates on:
2020­07­22
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 13799:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
©
NATIONAL REGULATIONS. ISO 2020

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ISO/FDIS 13799:2020(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
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Published in Switzerland
ii © ISO 2020 – All rights reserved

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ISO/FDIS 13799:2020(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 1
4.1 Type . 1
4.2 Nominal sizes . 2
5 Dimensions . 2
6 Materials . 2
7 Construction . 2
8 Manufacturing and inspection . 2
9 Marking . 2
Annex A (normative) Basis for strength assessment of recessed bitts (casting type) .6
Bibliography . 8
© ISO 2020 – All rights reserved iii

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ISO/FDIS 13799:2020(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 non­governmental, 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 of 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
www .iso .org/ iso/ foreword .html.
This document was prepared Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee
SC 4, Outfitting and deck machinery.
This second edition cancels and replaces the first edition (ISO 13799:2012), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— the definition of SWL (3.1) has been reworded;
— the mark numbers in Figure 1 have been amended;
— technical information on FEM has been added in A.3.1.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

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ISO/FDIS 13799:2020(E)

Introduction
The recessed bitt is a type of ship’s towing fitting installed on the side shell of the ship.
Recessed bitts are normally provided to easily attach the towing lines where the height of the mooring
deck is too high.
© ISO 2020 – All rights reserved v

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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 13799:2020(E)
Ships and marine technology — Ship's mooring and towing
fittings — Recessed bitts (casting
...