What is the proof test load percentage for custom designed rigging hardware under OSHA guidelines?

The proof test load percentage for custom designed rigging hardware, according to OSHA guidelines, is set at 125%. This percentage is established to ensure that the rigging hardware can perform safely and effectively under anticipated working conditions. By applying a load that is 125% of the intended working load limit during proof testing, it allows for a safety margin to verify the integrity and reliability of the hardware.

This testing process ensures that the rigging equipment has not only the strength to handle the regular loads it will encounter during operation but also additional capacity to account for unexpected factors that might occur. This process is crucial for maintaining safety standards in the workplace, reducing the likelihood of equipment failure during actual use.

Other percentages, such as 100%, 150%, or 175%, would either suggest insufficient testing or unnecessary excess that does not align with established safety protocols for custom rigging hardware used in various applications. Thus, the 125% figure is both practical and scientifically designed to safeguard users in the field.