Overview
ISO 5488:2015 - Ships and marine technology - Accommodation ladders - specifies safety, design, manufacturing and testing requirements for accommodation ladders used on merchant ships (excluding passenger ships). The standard also covers accommodation ladders used in combination with pilot ladders (referred to as pilot accommodation ladders) and sets minimum dimensions, structural loads, material and surface treatment, testing, inspection and marking requirements to enable safe embarkation and disembarkation of crew and pilots.
Key topics and technical requirements
The standard addresses both functional design and verification. Key technical points include:
- Types covered: revolving-platform ladders, fixed-platform ladders, single-, multi- and telescopic constructions.
- Dimensions:
- Effective walking width: 600 mm.
- Nominal length ranges: 3.6 m to 18 m in 0.6 m steps; above 18 m in 0.7 m increments.
- Step spacing: 300–350 mm (300 mm for ≤18 m nominal length).
- Handrail height: ≥ 1 000 mm (two handrails evenly spaced).
- Distance between stanchions: ≤ 1 500 mm.
- Angles of use:
- Designed for safe horizontal use; safe operation up to 55° from horizontal.
- Pilot accommodation ladders: safe operation up to 45° (per IMO A.1045(27)).
- Design and loadings:
- Steps: uniform load 735 N per step; individual steps must withstand a central point load of 735 N.
- Pilot ladders: additional requirement of 1 470 N on two intermediate steps simultaneously.
- Access/intermediate platforms: 4 000 N/m² uniform loading.
- Handrails: side loading 500 N/m without permanent deformation.
- Safety factor: 2× yield point for steel and 2× 0.2% proof stress for aluminium.
- Materials & surface:
- Recommended materials: structural steel (e.g., Fe360B) or aluminium alloys (e.g., AW‑Al Mg5, AW‑Al MgSi).
- Steel: anti‑corrosion treatment; aluminium: anodic oxidation; measures to prevent galvanic corrosion.
- Manufacture, testing and inspection:
- Prototype testing, inspection and marking requirements are specified (including strength of pivots, suspension points and anti‑twist ladder frames).
Applications and who uses it
ISO 5488 is essential for:
- Shipowners and shipyards specifying accommodation ladder design and acceptance criteria.
- Marine equipment manufacturers and designers producing accommodation and pilot accommodation ladders.
- Classification societies, port authorities, ship operators, marine inspectors and procurement teams verifying compliance and safe transfer arrangements.
- Safety managers and crew responsible for maintenance and safe use of access systems.
Related standards
Normative references include ISO 209, ISO 630-1, ISO 2408 and IMO Resolution A.1045(27) - useful for material properties, wire‑rope requirements and pilot transfer arrangements.
