According to ASME B30.23, to what percentage should the platform and rigging be proof tested?

The correct percentage for proof testing the platform and rigging according to ASME B30.23 is 125%. This specification ensures that the equipment is subjected to a load greater than its rated capacity, which serves as a crucial safety measure. The 125% proof test is designed to identify any potential weaknesses or defects in the material or construction before the equipment is put into service. By applying this higher load, operators can ensure that the rigging and platform will perform safely under normal operating conditions, thereby reducing the risk of failure during actual use.

The choice of 100% represents testing to the maximum rated capacity without any margin for safety, which is insufficient for identifying hidden defects. Testing at 150% or 175% would overstrain the equipment beyond reasonable limits, potentially damaging it and not providing useful feedback within the scope of normal operational conditions. Therefore, the 125% figure strikes the essential balance between safety and practicality, solidifying it as the industry standard in this context.