| Intended use and route | Determine whether the unit will travel internationally as a freight container, move only within a site, or serve as a fixed modular building. | Confirm scope CSC approval is relevant to freight containers within the Convention’s scope; it is not a general building-quality certificate. | Different applications involve different transport, structural, building, and local regulatory requirements. | Ask the supplier to identify the unit’s intended classification and list the approvals required for the planned route and use. |
| CSC safety approval | Inspect the Container Safety Convention (CSC) safety approval plate and confirm that it is permanently affixed and legible. | Verify plate The approval details should correspond to the specific container and be consistent with its records. | The CSC plate provides safety-related information for an approved container; a sales description alone is not proof of approval. | Request clear photographs of the plate and check the approval details with the relevant approval or inspection authority when needed. |
| Plate information | Check the container identification, approval reference, date of manufacture, maximum operating gross mass, and applicable stacking and racking test information. | Values and identification should be readable and consistent with the container’s documentation. Applicable plate particulars depend on the container and approval. | These details help establish identity and the approved operating limits; they must not be assumed from appearance or external dimensions. | Compare the plate with the inspection records and the supplier’s specification. Do not exceed marked limits. |
| Inspection status | Check the container’s examination status under an applicable periodic examination scheme, such as an approved continuous examination programme (ACEP), or a periodic examination system. | Check current status Confirm that the relevant inspection or examination is in date for the planned operation. | CSC approval does not mean that a container remains in safe condition indefinitely; damage and maintenance affect continued use. | Request current examination evidence and inspect for damage, corrosion, unauthorised repairs, and defects before loading or lifting. |
| ISO 1161 corner fittings | Confirm that the corner fittings are specified as compatible with ISO 1161 and that the fittings on the unit match the intended handling and securing equipment. | Verify interface Check the fitting type, position, condition, and dimensional compatibility—not only a statement that the unit is “ISO compatible.” | ISO 1161 specifies requirements for freight-container corner and intermediate fittings. Compatibility supports connection to suitable equipment but does not certify the whole container. | Ask for the fitting specification or inspection evidence. Have a competent person confirm compatibility with the actual twistlocks, lifting devices, or support system. |
| Handling and lifting method | Identify how the module will be lifted, stacked, secured, and supported, including the equipment and contact points involved. | No assumed lift Use only a method and equipment suitable for the unit’s design, condition, and marked limits. | Corner-fitting compatibility alone does not establish that every lifting arrangement or loading condition is safe. | Obtain the manufacturer’s handling instructions and confirm the lifting plan with a qualified lifting or transport professional. |
| Dimensions and interchangeability | Compare the unit’s external dimensions and corner-fitting locations with the receiving vehicle, vessel, rack, foundation, or adjacent modules. | Check the applicable container size/type specification and the actual interface dimensions; do not rely on nominal size alone. | ISO 1161 concerns fittings, while container series dimensions and ratings are addressed by other standards, including ISO 668. | Request a dimensioned drawing and verify clearances, support points, connection spacing, and access at the installation site. |
| Mass and payload | Review maximum gross mass, tare mass, payload, and any stacking or racking limits shown on the plate or in approved documentation. | Use marked ratings Confirm that the proposed cargo and handling loads stay within the applicable approved limits. | Ratings vary by individual container; a rating from another unit or a generic product sheet cannot safely substitute for the unit’s own data. | Calculate loaded mass and load distribution, and confirm compatibility with vehicle, lifting equipment, and site support capacities. |
| Identity and documentation | Match the container identification number on the unit to the CSC plate, inspection records, drawings, and any supplied certificates. | Records match Resolve missing, inconsistent, altered, or unreadable identification before purchase or dispatch. | Traceable records help verify that approvals and inspection evidence apply to the actual unit being evaluated. | Make legible photographs, the inspection history, relevant drawings, and written confirmation of the unit’s condition part of the purchase file. |
| Final purchase decision | Evaluate approval, inspection condition, fitting compatibility, operating limits, documentation, and suitability for the intended application together. | Proceed only when verified Treat missing evidence, damaged fittings, invalid inspection status, or mismatched records as issues requiring resolution. | No single plate, standard, or fitting feature proves that a modular container is suitable for every route or use. | Record the checks and obtain independent technical or regulatory advice where the application, jurisdiction, or load case requires it. |
