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Proof Load Testing of Lifting Equipment

Proof load testing is designed to ensure that items of lifting equipment can perform to the required standard in accordance with manufacturer’s guidance, by giving it a full strength test. Proof load tests are often needed in addition to the statutory requirements, e.g. LOLER regulations.


When is a Proof Load Test Required?

A proof load test is required on installation of any lifting equipment before the item is brought into service.

There may be other times in the equipment’s life where a proof test is required, e.g.

  • following a weld repair to a structural member
  • after a complete overhaul
  • following an incident
  • periodic lifting equipment testing may be specified in some British standards, e.g. BS7121, applicable to lorry loader cranes

Inspection and Testing Services for Cranes and other Lifting Equipment

Proof load tests on cranes all types of lifting equipment with certification, either on-site or at ISI’s Test House, including:


Chain BlocksMobile access platforms
ChainsMobile crane testing
ExcavatorsOverhead crane testing
Forklift trucksRunways
GantriesScissor lifts
JacksToe jacks
Jib cranesTrolley jacks
Lifting equipmentVehicle lifts
Lifting tackleWeb slings
Lorry loadersWinches
Industrial heavy duty lifting equipment image

Dock Yard Lifting Beam Inspection

Prototype testing

ISI also carry out prototype testing for non-lifting equipment, to test the equipment’s physical properties and strength.

Test House Facility

ISI has a range of specific test rigs, blast screens and specialist test machinery, some of which can be made available for on-site testing. In some cases it may be more suitable to book the item into our testing facility in Nuneaton.

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