Ships and marine technology - Ship's mooring and towing fittings - Pedestal fairleads

This document specifies the nominal sizes, dimensions and materials, as well as construction, manufacturing and marking requirements, for pedestal fairleads installed to lead the mooring rope of a ship.

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

General Information

Status
Published
Publication Date
27-Aug-2020
Current Stage
9060 - Close of review
Completion Date
04-Mar-2031

Relations

Effective Date
06-Jun-2022
Effective Date
30-Sep-2017

Overview

ISO 13776:2020 - Ships and marine technology - Ship's mooring and towing fittings - Pedestal fairleads specifies the nominal sizes, dimensions, materials, construction, manufacturing, inspection and marking requirements for pedestal fairleads used to lead a ship’s mooring rope. The standard defines preferred roller diameters, dimensional tables and strength assessment principles to ensure safe, durable pedestal fairleads for shipboard mooring and towing operations.

Key topics and technical requirements

  • Nominal sizes and dimensions: Pedestal fairleads are defined by the roller outside diameter (D). Nominal roller sizes in ISO 13776:2020 are 150, 200, 250, 300, 350, 400, 450 and 500 mm. Detailed dimensional tables and assembly figures are provided.
  • Materials: Manufacture from weldable steel plates with a minimum yield point of 235 N/mm².
  • Manufacturing & inspection:
    • All surfaces, including welds, must be free from visible flaws.
    • Surfaces contacting ropes must be free from roughness or irregularities that could abrade mooring ropes.
    • External anti‑corrosion protective coating is required.
  • Strength assessment (Annex A):
    • Design evaluated using simple beam theory.
    • Load cases include rope deflection through the throat of the roller (180°) and other deflection angles.
    • Allowable stresses: bending limited to 85% of yield stress, shear limited to 60% of yield stress.
    • Wear and corrosion allowances are incorporated in the stress criteria.
  • Marking & SWL (Safe Working Load):
    • SWL must be noted in the ship’s towing and mooring plan (see IMO MSC/Circ.1175).
    • The actual on‑board SWL must consider under‑deck reinforcement and shall not exceed the SWL indicated by the standard.
    • Pedestal fairleads must be clearly marked with SWL in tonnes (e.g., “SWL XXX t”) by weld bead or equivalent, placed so it is not obscured during operation.
  • References: ISO 13755 (steel rollers) and IMO guidance are cited; dimensional and SWL tables are included for design and reference.

Applications and users

ISO 13776:2020 is used for:

  • Shipbuilders and shipyards specifying and installing mooring fittings.
  • Manufacturers of mooring hardware and pedestal fairleads for design, fabrication and quality control.
  • Naval architects and marine engineers for structural design and integration with deck reinforcement.
  • Classification societies, port authorities and ship operators for inspection, certification and safe mooring procedures.
  • Procurement teams preparing technical specifications and compliance documentation.

Related standards

  • ISO 13755 - Steel rollers (used with pedestal fairleads)
  • IMO MSC/Circ.1175 - Guidance on shipboard towing and mooring equipment
  • Additional guidance: ISO 2408, IACS UR A2, OCIMF Mooring Equipment Guidelines (MEG4)

Keywords: ISO 13776:2020, pedestal fairleads, ship mooring fittings, SWL, mooring rope, marine technology, shipboard fittings.

Standard

ISO 13776:2020 - Ships and marine technology — Ship's mooring and towing fittings — Pedestal fairleads Released:8/28/2020

English language
8 pages
sale 15% off
Preview
sale 15% off
Preview

Frequently Asked Questions

ISO 13776:2020 is a standard published by the International Organization for Standardization (ISO). Its full title is "Ships and marine technology - Ship's mooring and towing fittings - Pedestal fairleads". This standard covers: This document specifies the nominal sizes, dimensions and materials, as well as construction, manufacturing and marking requirements, for pedestal fairleads installed to lead the mooring rope of a ship.

This document specifies the nominal sizes, dimensions and materials, as well as construction, manufacturing and marking requirements, for pedestal fairleads installed to lead the mooring rope of a ship.

ISO 13776:2020 is classified under the following ICS (International Classification for Standards) categories: 47.020.50 - Deck equipment and installations. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO 13776:2020 has the following relationships with other standards: It is inter standard links to ISO 17751-2:2023, ISO 13776:2012. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

ISO 13776:2020 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


INTERNATIONAL ISO
STANDARD 13776
Second edition
2020-08
Ships and marine technology —
Ship's mooring and towing fittings —
Pedestal fairleads
Navires et technologie maritime — Corps-morts et ferrures de
remorquage de navires — Chaumards à piédestal
Reference number
©
ISO 2020
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Nominal sizes . 1
5 Dimensions . 1
6 Materials . 1
7 Manufacturing and inspection . 2
8 Marking . 2
Annex A (normative) Basis for strength assessment of pedestal fairleads . 6
Bibliography . 8
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 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 13776:2012), 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.
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

Introduction
The pedestal fairlead is a type of ship’s mooring fitting installed on board to lead and change the
mooring rope.
INTERNATIONAL STANDARD ISO 13776:2020(E)
Ships and marine technology — Ship's mooring and towing
fittings — Pedestal fairleads
1 Scope
This document specifies the nominal sizes, dimensions and materials, as well as construction,
manufacturing and marking requirements, for pedestal fairleads installed to lead the mooring rope
of a ship.
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
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

Loading comments...