Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Crane Runway Bracing Vibration

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Bill, Gary,

Actually, if one of the end trucks (or, for that matter, one of the wheels) is misalligned the problem won't go away until the misallignment is corrected. No matter how much structure Gary builds the "crabing" or "racking" will not go away and may, in fact, result in some problem that is worse that vibrating bracing.

I still have a good relationship with my former client who sell, install, and maintain, all manner of cranes. I will pick their brains and see if I can come up with some more ideas.

        Thanks for reminding me of the misallignment problem.


On 08/06/2014 2:11 PM, Polhemus, William wrote:
Observation: The CAUSE might be mechanical, but the PROBLEM is, nonetheless, structural.

That is, the solution will be a structural engineering solution, since it's unlikely the mechanical equipment can be so easily altered or adjusted.
-----Original Message-----
From: seaint-seaosc(--nospam--at) [mailto:seaint-seaosc(--nospam--at)] On
Behalf Of Daryl Richardson Sent: Sunday, June 08, 2014 2:58 PM
To: seaint-seaosc(--nospam--at)
Subject: Re: [SEAINT-SEAOSC] Crane Runway Bracing Vibration

1.) Uneven drive wheel forces which would also cause racking of the bridge, hence, horizontal reactions of the runway beams. If this happens I would expect unanticipated deflections at the top of the columns. It would also mean that the problem is mechanical rather than structural.

Post your message to the list by sending it to: SEAINT-SEAOSC(--nospam--at)

The email messages sent to the list will be saved in an archive on the World Wide Web.
These archives are located at:

To contact the list owner, send your message to:

Sponsored By: Pacific Structural & Forensic Engineers Group, Inc. (PSFEG)

To unsubscribe, switch to/from digest, get on/off vacation, or change your email address, click here.