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Re: Cranes - 2 items

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2.  You can check out Crane Manufacturer's association design and guide
book. (http://www.mhi.org/cmaa).

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)hodgsoneng.ca> 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
> company, which they feel they are going to get. On my own, I am going to 
> do a preliminary design to Canadian requirements, but in the end it has 
> to be designed to Calif requirements and these are new to me.  I will be 
> looking into ASCE but I would appreciate any advice or comments, references, 
> etc. Gary

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