On March 25th 2013, we had the opportunity to use a Proof Testing Sled capable of pulling up to 44,000 pounds and recording test data via specialized software. This machine is owned and operated by B/A Products in Columbia, Maryland. A special thanks to Fritz for his assistance and technical expertise in completing these tests.
Five different tests where performed, documented, photographed, and videoed. I did my best to simulate real life use of the hooks and document the results for all to see. I think the results show not only the quality of the materials used, but the strength of the design and construction as well.
Below are the five videos, for more detailed descriptions and still pictures of each test please visit the Proof Testing page at Ken's Bolt on Grab Hooks Proof Testing
Test #1: Testing a Clevis Mount (BOCM) mounted to a 1/2" thick plate.
Test #2: Testing a Bolt-On Grab Hook (BOGH) mounted to a 1/2" thick plate.
Test #3: Testing a Bolt-On Grab Hook (BOGH) mounted to a 10 gauge thick plate to simulate the average thickness of a bucket.
NO Backing plate was used in this test, there is no evidence of the bolts pulling out, but the holes where elongated slightly.