Thursday, June 25, 2009

RE: Anchor rod washers

In case you’re unaware…a really good source of answers to questions about steel design and construction is the AISC Steel Solutions Service. This free service provides answers to technical questions usually within 24 hours. You can access the Steel Solutions Center by emailing or calling 866.ask.aisc.


In addition, a lot of information is available in the engineering FAQ section of the AISC website (


Finally, all Engineering Journal and AISC Design Guides are available as free downloads to AISC members; plus, AISC offers all of its codes and specifications as free downloads to everyone. Visit and click on ePubs/freePubs.


Scott Melnick

Vice President

American Institute of Steel Construction

One East Wacker Dr.

Suite 700

Chicago, IL 60601

312.670.8314 (tel)

312.804.1535 (cell)


There's always a solution in steel.





From: SGE Structural []
Sent: Thursday, June 25, 2009 4:07 PM
Subject: Re: Anchor rod washers




This table may (and not necessarily will) work only for the "standard" oversize. 


According to Section "Washer Requirements" (page 14-10), the washer "thickness must be suitable for the forces transferred."  In my understanding, that thickness was the original question.


V. Steve Gordin, SE
Irvine CA



----- Original Message -----

Sent: Thursday, June 25, 2009 14:02

Subject: RE: Anchor rod washers


Table 14-2 in AISC Manual, 13th Edition.  Base plate holes are oversized, washer holes are standard size.


Bill Sherman





From: Drew Morris []
Sent: Thursday, June 25, 2009 2:25 PM
Subject: Anchor rod washers

I am trying to track down the recommended washer plate thickness for anchor rods.  Typically the holes are oversized and I am trying to find the thickness for the washers.  i assume it is some percentage of the rod diameter.  Can anyone direct me to where i can this info?