What is a crane load test?
Short answer
| Aspect | Requirement |
|---|---|
| Purpose | Verify safe operation of crane, foundation and supporting structures |
| Overload | 25 % above SWL (min 10 %) |
| Motions tested | Hoist, slew, luff at low speed |
| Variable radius | Tests per load-radius chart |
| Witness | Administration or authorised person |
| Record | Readily available on board |
| Standards | BS 7121-2:2003; ISO 4310 |
- Definition: a load test and inspection to verify the safe operation of the crane or other lifting device, its foundation and supporting structures
- Typical overload: 25 % above SWL (minimum 10 % if reduced)
- Test motions: hoist, slew and luff at low speed; for variable load-radius cranes, tests follow the rated performance/load-radius chart
- When: after erection on board and before placing in service; repeated after modifications; annual visual inspection
- Witness: officer of the Administration or a duly authorised person/organisation
- Record: must be readily available on board
- Standards: BS 7121: Part 2:2003 (Cranes on Water Borne Craft); ISO 4310 Cranes – Test code and procedures
- India: governed under Merchant Shipping Act 2025 as flag State
Full answer
The full answer explains each point step by step, with the regulations and figures behind it and the discussion from other candidates. It is in the MEO Class II section of the Marine One forum, open to members enrolled for the MEO Class II exam.