Load Tests

All new, extensively repaired and altered cranes should be tested before initial use by or under the direction of an appointed person to confirm the load testing of a crane. Test loads shall not be more than 125% of the rated load. The test reports shall be placed on file where readily available to appointed personnel.

Harriman has 16,000 lbs of portable test weights and a test weight skid that weighs 2500 lbs. we have the capability of load testing up to 7.5 Ton cranes with these static weights. We are qualified to load test cranes of all capacities using water weights and other static weight options. Additionally, we have a portable test stand that can be used in our shop or transported to your plant to load test up to 10 Ton hoists, slings, and other lifting apparatuses.

Urban Legend

A common “Urban Legend” is that an item of unknown capacity can be load tested at 125% of the desired load and that a certificate can then be provided that states that this item is certified for the rated load. This is not true.

Proper Design

The act of load testing an item can damage the device being tested if it was not originally designed for the proper load. Load testing should only be performed after a structure, crane, monorail, jib, lifting beam, sling, etc. is known to have been designed to properly support a load and is in good physical and mechanical shape. A full visual inspection is recommended before load testing any item and if the designed load of a device is not known, in most cases reverse engineering can be performed to calculate the strength and capacity of an item.


Oftentimes load tests will be coupled with inspections. For more information on these services, please check out our frequent and periodic crane and hoist program above.

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