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

Re: STEEL: Min. Required Thickness for Anchor Rod Plate Washers

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Here's a SWAG...........1/2 the bolt diiameter but never thinner than 5/16?  

seems about right


On 6/8/05, Adair, Joel <jadair(--nospam--at)> wrote:
> AISC Steel Design Guide 1, "Column Base Plates", indicates that the plate
> washers should be 5/16" to 1/2" thick.  It doesn't, however, provide any
> guidance as to determining the appropriate thickness within that range for a
> specific situation.  I've stewed about this on occasion, but haven't had a
> situation yet where my forces being transmitted were such that I was
> motivated to make a research project out of it.  I typically use 5/16" or
> 3/8" plate washers. 
> -- Joel 
> --------------------------------- 
> Joel Adair, P.E. 
> Halff Associates, Inc. 
> Dallas, Texas 
> ---------------------------------
> -----Original Message-----
> From: Polhemus, Bill [mailto:bill.polhemus(--nospam--at)] 
> Sent: Wednesday, June 08, 2005 4:20 PM
> To: seaint(--nospam--at)
> Subject: STEEL: Min. Required Thickness for Anchor Rod Plate Washers
> I'm looking to include some info in a structural steel specification for
> these plate washers. I'd never really thought much about it before, but this
> could actually be a critical item of performance. 
> The Manual of Steel Construction, 3rd Edition, page 14-10 states "[Plate
> washer] thickness must be suitable for the forces to be transferred." Table
> 14-2 is cited but concerns itself only with the minimum plate size to cover
> the anchor bolt hole. 
> Does anyone have a "rule of thumb" for plate washer thickness for base plate
> anchor rods, ideally as a function of the anchor bolt diameter? 
> I realize I could probably spend a few hours coming up with my own (e.g.
> plate on knife-edge supports with central hole, which IIRC is in "Roark")
> but I haven't the time right now. 
> Any insights would be much appreciated. 
> This email and any files transmitted with it are confidential and intended
> solely for the use of the addressee. If you are not the intended addressee,
> then you have received this email in error and any use, dissemination,
> forwarding, printing, or copying of this email is strictly prohibited.
> Please notify us immediately of your unintended receipt by reply and then
> delete this email and your reply. Tyson Foods, Inc. and its subsidiaries and
> affiliates will not be held liable to any person resulting from the
> unintended or unauthorized use of any information contained in this email or
> as a result of any additions or deletions of information originally
> contained in this email.

******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at:
*   This email was sent to you via Structural Engineers 
*   Association of Southern California (SEAOSC) server. To 
*   subscribe (no fee) or UnSubscribe, please go to:
*   Questions to seaint-ad(--nospam--at) Remember, any email you 
*   send to the list is public domain and may be re-posted 
*   without your permission. Make sure you visit our web 
*   site at: 
******* ****** ****** ****** ******* ****** ****** ********