- Amy -
By any chance was this a JLG aerial lift? If so, start doing some heavy
investigating as they had a big issue with sheared bolts last summer, maybe
spring. Where the problem comes into play is that the turntable bolts are
usually concealed by a cover plate. To truly inspect the bolts you have to remove
the cover plate and most people do NOT do that before each shift. However,
that is mandated by ANSI and OSHA if my memory serves me correctly.
If you can get your hands on the manual it will tell you specifically how
often to replace the bolts in their entirety according to the manufacturer.
Those buckets put an extraordinary amount of pressure on the turntable and
shearing is a very serious concern. Water seeps under the plate and rusting is
quite common among other things. Also, as previously stated, the integrity of
the actual bolts might have been compromised by the bolt maker. One thing I
am quite certain of though is that if you can get your hands on the
manufacturer's maintenance/operating manual you will learn a lot of information and
you will be shocked at the rules. They are some of the strictest in the
industry because of the safety factors involved.
Another issue based on something said earlier. The employee who was in the
bucket was supposed to be certified, I believe. Certification requires
training. Although there is no training in the world that will protect you when
the shearing actually happens, I believe if he wasn't properly trained and
certified, something the employer definitely knew, that would fall smack dab on
the shoulders of the employer in the eyes of the jury.
You can find the OSHA and ANSI rules here -
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