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Western Iowa | Just a couple thoughts...
Were they hand tightened or did a cordless impact get used? I have been surprised how many helpers I have had want to tighten those up with an impact gun, not realizing that is a no-no. They never hold if you do that.
A lot of helpers also don't tighten them down enough when doing it by hand. If the hole is the correct size and you are using a good quality anchor bolt, you should be able to tighten them down hard. Bolt should break before the bolt would ever pull out.
The one in your picture has a nylon lock nut on it. I have never used those in that application and not really sure you should. I wonder if it makes it harder to tighten down? Maybe it makes no difference? IDK
Only other time I have had those red head type bolts fail in a gate situation is if the gate can swing around far enough to hit the concrete wall the hinges are bolted down to. The amount of leverage a gate has is incredible 3-4 inches from the mount when the gate is 12-16ft long. 3/8 bolts don't cut it, need to do at least 1/2 if not 5/8. | |
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concrete lags coming loose
