ISO 18824:2024

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

This document specifies the design, size and technical requirements for horizontal roller fairleads installed to brace the mooring rope over other obstacle fittings.

Titre manque

General Information

• Status: Published
• Publication Date: 29-Sep-2024
• ICS: 47.020.50 - Deck equipment and installations
• Technical Committee: ISO/TC 8/SC 4 - Outfitting and deck machinery
• Drafting Committee: ISO/TC 8/SC 4 - Outfitting and deck machinery
• Current Stage: 6060 - International Standard published
• Start Date: 30-Sep-2024
• Due Date: 31-Oct-2025
• Completion Date: 30-Sep-2024

Overview

ISO 18824:2024 is an international standard specifying the design, size, and technical requirements for horizontal roller fairleads used in ship mooring and towing operations. These fittings are installed on vessels to guide and brace mooring ropes over obstacles safely and efficiently. Developed by ISO Technical Committee ISO/TC 8 (Ships and Marine Technology), this standard ensures reliable performance and safety of mooring equipment.

The document covers key aspects such as dimensions, materials, construction, manufacturing, inspection, and marking of horizontal roller fairleads. It applies to their design, production, and onboard inspection and is essential for shipbuilders, marine engineers, and equipment manufacturers.

Key Topics

• Design & Dimensions: Defines nominal sizes (e.g., 200 × 600 mm up to 250 × 1,200 mm), structural elements like rollers, axle, foundation, and bearings, with detailed parameters for safe installation and operation.
• Materials: Specifies materials including steel plates for rollers (minimum yield point 235 N/mm²), round bar axles (minimum 245 N/mm²), and brass or bronze bushings for durability and corrosion resistance.
• Construction Requirements: Covers welded or seamless steel tubes for rollers and pressure-tested axles, ensuring smooth rotation, minimal rope abrasion, and reliable transmission of load to hull structures.
• Manufacturing & Inspection: Calls for flaw-free surfaces, anti-corrosion coatings, lubrication fittings (per ISO 6392-1), and performance tests like smooth rotation and load-bearing capacity.
• Marking & Documentation: Requires clear marking of Safe Working Load (SWL) on fittings and towing/mooring plans for shipmasters, with guidance on load calculations and foundation reinforcement considerations.
• Strength Assessment: Provides basis using finite element analysis and beam theory to evaluate loads and stress limits, including allowance for wear and corrosion, supporting safe operational use.

Applications

ISO 18824:2024 is critical for:

• Shipbuilders and Naval Architects designing mooring and towing systems that meet international safety and performance standards.
• Marine Equipment Manufacturers producing horizontal roller fairleads compliant with quality and engineering specifications.
• Ship Operators and Masters managing mooring operations with correctly rated and inspected equipment, ensuring safety in port maneuvers.
• Classification Societies and Inspectors verifying installation integrity and conformity with international regulations.

The standard helps enhance mooring line management by guiding rope routing over obstacles, reducing rope wear and mechanical stress. Proper installation according to ISO 18824 benefits vessel durability, crew safety, and operational efficiency.

Related Standards

ISO 18824:2024 references several important marine and industrial standards:

• ISO 4200: Plain end steel tubes – relevant for roller tube construction.
• ISO 6392-1: Lubrication fittings – specifies grease nipple types used in fairleads.
• IACS UR A2: Shipboard fittings related to towing and mooring structure requirements.
• IMO MSC.1/Circ.1175/Rev.1: Guidelines for shipboard towing and mooring equipment compliance.

By aligning with these standards, ISO 18824 supports harmonized global practices in marine outfitting and safety.

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Keywords: ISO 18824:2024, horizontal roller fairleads, ship mooring fittings, marine technology standards, mooring rope guidance, ship towing equipment, marine safety standard, shipbuilding compliance, mooring hardware design, steel marine fittings

Standards Content (Sample)

International
Standard
ISO 18824
First edition
Ships and marine technology —
2024-09
Ship's mooring and towing fittings
— Horizontal roller fairleads
Reference number
© ISO 2024
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Nominal sizes . 1
5 Structure and dimension . 1
6 Materials . 3
7 Construction . 3
8 Manufacturing and inspection . 4
9 Marking . . 4
Annex A (informative) Basis for strength assessment of horizontal roller fairleads . 5
Bibliography . 6

iii
Foreword
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This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee
SC 4, Outfitting and deck machinery.
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iv
International Standard ISO 18824:2024(en)
Ships and marine technology — Ship's mooring and towing
fittings — Horizontal roller fairleads
1 Scope
This document specifies the design, size and technical requirements for horizontal roller fairleads installed
to brace the mooring rope over other obstacle fittings.
This document is applicable to the design, manufacture and inspection of horizontal roller fairleads.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
safe working load
SWL
maximum load applied on the rope in service conditions
Note 1 to entry: The SWL is expressed in tonnes (1 t = 9,8kN).
3.2
horizontal roller fairlead
type of mooring fitting installed on board a ship to brace the moorin
...