ISO 19355:2016

Overview

ISO 19355:2016 - Ships and marine technology - Marine cranes - Structural requirements sets out structural design and construction rules for metal marine cranes used in harbour or sheltered-water conditions. The standard focuses on shipboard and floating cranes including deck cranes, floating/grab cranes, engine-room and provision cranes (including floating docks). It defines material, welding, bolting, access and structural-strength checks to ensure safety, fatigue resistance and compliance with classification societies.

Keywords: ISO 19355:2016, marine cranes, structural requirements, shipboard cranes, floating cranes

Key topics

• Scope and exclusions
  • Applies to deck cranes, floating/grab cranes, engine-room and provision cranes in harbour conditions.
  • Explicitly excludes extreme ambient temperatures (below −20 °C or above +45 °C), accident/collision loads, multi-crane lifts, lifting accessories, hand-powered cranes, shore-side cargo cranes, portable onboard cranes, and certain lifesaving appliance lifting appliances.
• Materials
  • Selection of steels and connecting materials must suit load characteristics, ambient temperature and member thickness; main structural materials require manufacturer certification and testing.
• Welding
  • Welding specifications, welder qualification and traceability are required. Quality levels for imperfections shall comply with ISO 5817 (Grades B, C, D). Nondestructive testing (NDT) and visual inspection levels depend on structural importance and joint type.
• High‑strength bolted connections
  • Bolts inspected per ISO 6157-1; contact surfaces must be clean and untreated unless specified; tightening with calibrated torque wrenches and documented records required.
• Access and cabins
  • Operator cabins must meet ISO 8566‑1 and ISO 8566‑4; access routes, ladders, platforms and handrails required for inspection/maintenance positions.
• Structural strength checks
  • Requires statics, dynamics and stress analysis. Allowable stresses are derived from material yield strength using condition-dependent safety factors (examples: n = 1.5 for no-wind working condition; n = 1.33 for working with wind; n = 1.15 for non-working or special loads). Design checks include member stresses, buckling, local plate stability and overall jib stability.

Keywords: welding inspection, high-strength bolts, structural strength check, crane jib stability, fatigue strength

Applications

• Design and fabrication of shipboard and floating cranes for harbour usage
• Class, shipyard and OEM design reviews and approval processes
• Procurement specifications for marine crane manufacturers
• Welding/NDT planning and bolting installation procedures on cranes

Who uses this standard

• Shipbuilders, crane manufacturers and naval architects
• Classification societies and marine surveyors
• Structural and mechanical engineers responsible for crane design and certification
• QA/QC, welding and NDT teams in shipyards

Related standards

• ISO 19354 - Marine cranes - General requirements
• ISO 3818 / ISO 3828, ISO 4306‑1 - Vocabulary and symbols for cranes/shipboard machinery
• ISO 5817 - Welding quality levels
• ISO 8566‑1 / ISO 8566‑4 - Crane cabins
• ISO 6157‑1 - High‑strength bolt inspection

For procurement or design guidance, reference ISO 19355:2016 together with classification society rules and the related ISO documents listed above.