Overview
ISO 23575:2022 specifies types, dimensions and strength characteristics of marine securing devices used for ro-ro cargoes (roll-on/roll-off ships). The standard covers fixed and portable (loose) fittings, test methods (type and production testing), material and dimensional tolerances, marking, tightness and installation/maintenance guidance. It also notes applicability to road vehicles secured on inland vessels.
Keywords: ISO 23575, marine securing devices, ro-ro cargo securing, lashing points, fixed fittings, MSL
Key topics and technical requirements
- Scope and applicability: Devices for securing ro-ro cargoes in sea transport; reference use for road vehicles on inland vessels.
- Types and categorization: Fixed fittings (D-rings/clamps, flush/raised clover leaf sockets, lashing cups, crinkle bars, raised lashing sockets) and portable/loose fittings. Examples and typical codes in the standard: DR, CL.F4, CL.F2, LC, CB, CL.R4, CL.R2, LS.R3.
- Dimensions and strength: Dimension tables (Tables 2–9) give sizes in mm and strengths in kN. Example MSL (maximum securing load) values from the standard:
- DR/40 - MSL 40 kN; DR/100 - MSL 100 kN; DR/180 - MSL 180 kN
- CL.F4/100 - MSL 100 kN; CL.F4/160 - MSL 160 kN
- LC/75 - MSL 75 kN; LC/100 - MSL 100 kN
- CB/20 - MSL 20 kN; CB/100 - MSL 100 kN
- Layout requirements: For ro-ro lanes, longitudinal spacing of fixed fittings ≤ 2.5 m and transverse spacing ≤ 3.0 m; lane fittings should have MSL ≥ 100 kN.
- Materials and fabrication: Material strength grade and low-temperature impact performance must be compatible with the deck plate; references to ISO 7452, ISO 9013, ISO 2768-1 for tolerances and cutting.
- Testing and inspection:
- Type testing: at least three samples per direction; compliance tests per Clauses 10.4–10.8.
- Production testing to ensure consistent quality.
- Tightness tests and proof loading (e.g., samples subjected to ≥ 1.25 × MSL for tightness testing).
- Test reporting, marking and manufacturer certificates required.
- Installation & maintenance: Informative annexes provide typical securing methods, installation and maintenance guidance.
Practical applications
- Designing and specifying lashing points and securing arrangements on ro-ro decks
- Procuring and certifying fixed and portable securing fittings for ships and inland vessels
- Preparing cargo securing manuals and lashing plans for vehicle stowage
- Performing manufacturer type tests, production checks and shipboard installation verification
- Ensuring compliance with classification societies and port/maritime authorities
Who uses this standard
- Shipowners and ship operators (ro-ro and vehicle carriers)
- Shipbuilders and naval architects
- Manufacturers of marine securing devices and lashing equipment
- Classification societies, port authorities and marine surveyors
- Cargo securing officers and deck crews responsible for ro-ro stowage
Related standards
ISO 23575:2022 is a practical, prescriptive reference for safe, consistent selection, testing and installation of marine securing devices used in ro-ro cargo operations.