Thanks for all the observations and suggestions. I am planning to go the route similar to what LittleInch diagrammed with 9/16" or 5/8" grade 8 coated regular bolts with a backing plate. But I still plan to pursue contacting a state regulatory agency to get those inferior 1/2" SS U bolts pulled...
LittleInch
The U bolts & mounting brackets were loosely assembled over the rectangle cross beam, then moved into the desired position, with the top of the U bolt resting on the top of the rectangle cross beam. At that point, the top mounting nuts were very slightly tightened just to the point...
LittleInch
Also yes but that single picture is unclear as to how the boat "lifting bunks?" are actually attached to the frame and how , if at all, these are tightened. Needs more pictures or a drawing / side on view. Are these bunks designed to slide to fit the particualr boat? Is there any...
Thank you for all your comments and assessments. Besides the $ 1,000.00 plus damage to my one year old boat, I am more concerned with preventing this type of failure for anyone else that may purchase these replacement U bolts from a boat lift parts store like I did. My boat damage can be...
Looking for some insight on a failure of a Stainless Steel Square 1/2" U bolt. 3 1/2" legs and 5 3?4" wide inside. Rated for 5000 pounds capacity with a 20% over factor so 7000 pounds.
Background: this is one of 4 U bolts used on the lifting bunks of a boat hoist that hold up the boat on the...
