Spreader beams must be load tested after construction to what percentage of the WLL?

Spreader beams must be load tested after construction to what percentage of the WLL?

• A. 100%
• B. 110%
• C. 125%
• D. 150%

Answer: (C)

Spreader beams are tested after fabrication to confirm they can handle more than their normal working load. The standard proof test is set at 125% of the Working Load Limit. This 25% extra capacity provides a safety margin to reveal hidden defects in the beam, welds, and connections, and to verify that everything holds together and deflects within acceptable limits under load. If the beam passes at 125%, it gives confidence the equipment will perform safely during actual use and when occasional overloads occur. Testing to 100% would offer no margin to detect flaws, 110% isn’t the standard threshold, and 150% would place excessive stress beyond typical requirement.

Spreader beams are tested after fabrication to confirm they can handle more than their normal working load. The standard proof test is set at 125% of the Working Load Limit. This 25% extra capacity provides a safety margin to reveal hidden defects in the beam, welds, and connections, and to verify that everything holds together and deflects within acceptable limits under load. If the beam passes at 125%, it gives confidence the equipment will perform safely during actual use and when occasional overloads occur. Testing to 100% would offer no margin to detect flaws, 110% isn’t the standard threshold, and 150% would place excessive stress beyond typical requirement.