Crane Load Testing Standards - Why It Is Required and How It Is Done

Crane load testing is a process mandated by international standards and Thai law to confirm that a crane can safely handle loads up to its rated capacity. It must generally be performed both before initial operation and after any significant repair or modification.

Testing is divided into two main types: Static Load Test, which uses a test load of 125% of rated capacity held for 10 minutes to verify that the structure and load-bearing components show no permanent deformation; and Dynamic Load Test, which uses 110% of rated capacity to test hoisting, long travel, and cross travel, verifying the operation of all systems.

During testing, engineers inspect: wire rope elongation, brake function, every limit switch, overload protection systems, motor and gearbox operation, and any abnormal noise or vibration.

After successful testing, a Load Test Certificate is issued detailing the crane specifications, rated capacity, test loads, and inspection results. This document must be retained for the entire service life of the crane.

D2 Cranes performs load testing on every crane it installs, with complete certification documentation. We also provide load testing services for existing cranes in compliance with legal requirements.