ISO 3797:2023
(Main)Ships and marine technology - Vertical steel ladders
Ships and marine technology - Vertical steel ladders
This document specifies the types, structure, dimension and technical requirements for vertical steel ladders to be fitted on board ships. This document applies to design and manufacture of vertical steel ladders.
Navires et technologie maritime — Échelles verticales en acier
General Information
- Status
- Published
- Publication Date
- 07-Aug-2023
- Technical Committee
- ISO/TC 8/SC 8 - Ship design
- Drafting Committee
- ISO/TC 8/SC 8 - Ship design
- Current Stage
- 6060 - International Standard published
- Start Date
- 08-Aug-2023
- Due Date
- 18-Mar-2025
- Completion Date
- 08-Aug-2023
Relations
- Effective Date
- 06-Jun-2022
Overview
ISO 3797:2023 - Ships and marine technology - Vertical steel ladders - specifies the types, structure, dimensions and technical requirements for vertical steel ladders fitted on board ships. It applies to the design and manufacture of ladders used in marine environments and updates the previous 1976 edition by extending types, dimensions and adding fall-protection, material and surface-treatment requirements.
Key topics and technical requirements
- Types: Two ladder types are defined
- Type A: square-bar rungs (see ISO 1035-2)
- Type B: round-bar rungs (see ISO 1035-1)
- Structure & dimensions: Standardized layout (stringers, rungs, supports) with step pitch equal and recommended at 300 mm (range 250–350 mm). Tabled dimensions cover standard widths, rung sizes and stringer profiles.
- Material: Steel to ISO 630-2, minimum grade S235.
- Surface treatment: Protective coatings as appropriate; ladders for ballast tanks must meet PSPC requirements. Edges rounded to R2 mm and hot-dip galvanizing recommended after cleaning per ISO 1461 (coating thickness per ISO 1461).
- Support & fixation: Welding or movable (bolt) connection supports permitted. Each support shall be adequate to sustain 1 000 N with a safety factor of 1:5. Adjacent supports should be no further than 2 500 mm apart to limit vibration.
- Appearance & tolerances: No burrs, dents or cracks; width tolerance ±2 mm (ISO 2768-1). Mass tolerance not to exceed 4% of theoretical weight.
- Safety protection: Fall protection such as ladder hoops (basket or single type) is required/recommended; examples are provided.
Practical applications and users
ISO 3797:2023 is directly relevant to:
- Shipbuilders, shipyards and marine equipment manufacturers specifying and fabricating vertical steel ladders for accommodation, access ways, machinery spaces and tank spaces.
- Naval architects and ship designers incorporating compliant access ladders into vessel plans.
- Procurement and classification personnel who need standardized designation and documentation.
- Safety officers and maintenance teams responsible for inspection, repair and retrofitting of ladders and fall-protection elements.
Benefits include consistent safety, interchangeability of components, corrosion protection guidance and clear designation rules for delivery documentation.
Related standards
- ISO 630-2 (structural steels delivery conditions)
- ISO 1461 (hot-dip galvanizing)
- ISO 1035-1 / ISO 1035-2 (round/square bar dimensions)
- ISO 2768-1 (general tolerances)
- PSPC (ballast tank protective coating requirements)
Example designation: Vertical steel ladder ISO 3797:2023 A22-M-3 600 × 400 (type, rung, connection, length × width).
Frequently Asked Questions
ISO 3797:2023 is a standard published by the International Organization for Standardization (ISO). Its full title is "Ships and marine technology - Vertical steel ladders". This standard covers: This document specifies the types, structure, dimension and technical requirements for vertical steel ladders to be fitted on board ships. This document applies to design and manufacture of vertical steel ladders.
This document specifies the types, structure, dimension and technical requirements for vertical steel ladders to be fitted on board ships. This document applies to design and manufacture of vertical steel ladders.
ISO 3797:2023 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 3797:2023 has the following relationships with other standards: It is inter standard links to ISO 3797:1976. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 3797:2023 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 3797
Second edition
2023-08
Ships and marine technology —
Vertical steel ladders
Navires et technologie maritime — Échelles verticales en acier
Reference number
© ISO 2023
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
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Email: copyright@iso.org
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Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Type, structure and dimensions .1
4.1 Type . 1
4.2 Structure and dimensions . 1
4.2.1 Structure . 1
4.2.2 Dimensions . 2
5 Technical requirement . 3
5.1 Material . 3
5.2 Surface treatment . 3
5.3 Support . 3
5.4 Appearance . 4
5.5 Tolerance . 4
5.6 Safety protection . 4
6 Designation . 6
Bibliography . 7
iii
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This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 8, Ship design.
This second edition canc
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