← Return to Plant Pictures Category 4: Testing & Re-Certification As of November 2008 we have installed a larger test bed, 103ft long with a capacity of 1,200,000 lbs (5,340 kN). 2 special lifting sheave blocks for the Navy are proof tested and certified. Swivel Hoist ring for inspection and re-certification. Training of bearing style swivel inspection. Quality inspection breaking strength test on chain sling components. Destruction on a used length of wire rope. Detailed examination of samples tested to destruction. Investigation as to the cause of rope failure. Inspection of a chain sling bridle. We provide Test Certificates with our chain slings.