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Re: Cranes - 2 items

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Thanks Himanshu,
I have all the CMAA crane publications. I was not specific enough. My big concern is the seismic requirements, as I have never had to work with those requirements specifically for California (or the USA actually). I was not aware of the ASME documents. Do they give an example of EQ loading on a EOT crane or a gantry crane?

On 7/9/2014 8:24 AM, Himanshu Goyal wrote:
2.  You can check out Crane Manufacturer's association design and guide
book. (

Also ASME publishes NOG-1 for gantry cranes - the rules are extensive with design examples.

On Tue, Jul 8, 2014 at 7:23 AM, Gary L. Hodgson and Assoc. <
design(--nospam--at)> wrote:

1. Thanks to all of you who replied to my e-mail about the vibrating X
bracing in the 30 ton crane runway. My customer found that the cause of the problem was vibration in the bridge drives as the crane started up. I have not found the exact cause, as the guy who explained it to me has a BA in history and works as the sales manager. I will try to dig further. Their solution was to decrease the start-up start speed so the motor vibration was less, over or near the columns of the braced bay. Apparently that was good enough for the end customer, as it did reduce the vibration to less annoying levels.

2. One of my customers is quoting a full gantry crane to a California

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