What is a crucial step to verify after making structural changes to a lifting platform?

After making structural changes to a lifting platform, it is essential to undergo a proof test. A proof test involves applying a load that exceeds the maximum anticipated service load to verify that the platform can handle the stress without structural failure. This step ensures that any modifications made have not compromised the integrity or safety of the lifting platform. The proof test serves as a definitive assessment of the platform's capacity and helps to identify any weaknesses that may not have been apparent through visual inspections or regular maintenance.

While regular maintenance checks and visual inspections are important for ongoing safety and functionality, they are not sufficient to confirm the strength and stability of a structure that has been altered. Similarly, submitting designs for approval is crucial during the planning phase but does not replace the necessity of conducting an actual proof test once the modifications are completed.