Ships and marine technology — Ship's mooring and towing fittings — Mooring chocks

1 Scope This International Standard specifies the design, size and technical requirements for mooring chocks installed to lead the mooring and towing rope of a ship.

Navires et technologie maritime — Corps-morts et ferrures de remorquage de navires — Chaumards

General Information

Status
Withdrawn
Publication Date
24-Jun-2012
Withdrawal Date
24-Jun-2012
Current Stage
9599 - Withdrawal of International Standard
Completion Date
28-Aug-2020
Ref Project

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ISO 13713:2012 - Ships and marine technology -- Ship's mooring and towing fittings -- Mooring chocks
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INTERNATIONAL ISO
STANDARD 13713
First edition
2012-07-01
Ships and marine technology — Ship’s
mooring and towing fittings — Mooring
chocks
Navires et technologie maritime — Corps-morts et ferrures de
remorquage de navires — Chaumards
Reference number
ISO 13713:2012(E)
©
ISO 2012

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ISO 13713:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved

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ISO 13713:2012(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 . 1
5 Dimensions . 1
6 Materials . 2
7 Construction . 2
8 Manufacturing and inspection . 2
9 Marking . 2
Annex A (informative) Basis for strength assessment of mooring chocks . 7
Bibliography .10
© ISO 2012 – All rights reserved iii

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ISO 13713:2012(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 13713 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee
SC 4, Outfitting and deck machinery.
iv © ISO 2012 – All rights reserved

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ISO 13713:2012(E)
Introduction
The mooring chock is a type of ship’s mooring and towing fitting installed on the shipside to lead the mooring
and towing rope from the ship’s inboard to outboard.
The mooring chocks are normally adopted for ships which use nylon or other synthetic ropes other than wire
ropes considering the small bending ratio (for wire ropes see ISO 13729.)
The tensile strength of rope is reduced depending on bend radius through the chock in accordance with the
rope manufacturer’s guidelines.
© ISO 2012 – All rights reserved v

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INTERNATIONAL STANDARD ISO 13713:2012(E)
Ships and marine technology — Ship’s mooring and towing
fittings — Mooring chocks
1 Scope
This International Standard specifies the design, size and technical requirements for mooring chocks installed
to lead the mooring and towing rope of a ship.
2 Normative references
The following referenced documents are indispensable for the application 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.
IMO Circular MSC/Circ.1175, Guidance on shipboard towing and mooring equipment
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
safe working load
SWL
maximum load in kN on the rope that should normally be applied in service conditions
4 Classification
4.1 Type
The mooring chocks shall be classified by its installation site as follows:
— Type A – Deck-mounted mooring chock;
— Type B – Bulwark-mounted mooring chock.
4.2 Nominal sizes
The nominal sizes, L x H of mooring chocks are denoted by reference to the width and height of the opening of
the chock, in millimetres. For the mooring chocks having the same size, the alphabetical character is followed
by nominal size for the different safe working load (SWL).
The nominal sizes are:
250x200, 300x250, 350x250, 400x250, 450x250, 500x250A, 500x250B
5 Dimensions
Mooring chocks have dimensions and particulars in accordance with Tables 1 and 2, and Figures 1 and 2.
© ISO 2012 – All rights reserved 1

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ISO 13713:2012(E)
6 Materials
The following material shall be used for manufacturing the mooring chocks:
2
— Chock: steel casting material having a yield point of not less than 235 N/mm or equivalent.
The carbon contents of the steel casting are not to be more than 0,23 % considering weldability.
7
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