] [Thread] [Date] [Author]

[Rick.Drake(--nospam--at)Fluor.com]

You describe the center of the hole being one inch way from the edge in the
direction of loadings.  For 3/4 diameter bolt, the 15/16"hole, is
"oversize" and you only have 17/32" of a steel material resisting the load,
and that's if the hole was exactly punched in the center of the two inch
angle length.  I would hope that both the Engineer-Of-Record and the Agency
would both take ASD Sec. J3.9 (LRFD Sec. J3.4) "pretty literal".

The AISC minimum edge distance (and minimum spacing) requirements in the
direction of load are to ensure that there is enough base material to
accept the load imparted by the bolt without unacceptable shear deformation
or shear fracture.  The minimum edge distances numbers in AISC
specification(s) tables are reasonable for the minimum loads that all
connections must be designed for (service 6 kips, ASD J1.6 or factored 10
kips, LRFD J1.7).

Rick Drake, SE
Fluor, Aliso Viejo, CA
rick.drake(--nospam--at)fluor.com
949-349-5791

*********



                                                                                                                                       
                      Rmhansonsece(--nospam--at)aol.co                                                                                              
                      m                        To: seaint(--nospam--at)seaint.org                                                                   
                      04/30/03 02:22 PM                                                                                                
                      Please respond to        cc:                                                                                     
                      seaint                                                                                                           
                                               Subject:  AISC hole edge distance                                                       
                                                                                                                                       
                                                                                                                                 ..... 
                                                                                                                                       




List,
I would like to find out what limits the edge distance on holes in steel
called by AISC section J.3.9. I have a miss fabricated field condition
where a 15/16" dia hole with a 3/4" dia bolt has been placed in the leg of
a L 3 x 3 x 1/4 angle that is only 2" long. Loads are in the 2" direction
and are shear only. ASD level stress checks for bearing and shear in angle
are at less than 50%. Agency approval reads AISC J.3.9 requirement pretty
literal. Need more ammo.
TIA

Robert Mantor Hanson, SE
Bellflower, CA.






-----------------------------------------------------------------------------------------------------
The information transmitted is intended only for the person
or entity to which it is addressed and may contain confidential
and/or privileged material. If you are not the intended recipient 
of this message you are hereby notified that any use, review,
retransmission, dissemination, distribution, reproduction or any
action taken in reliance upon this message is prohibited. If you 
received this in error, please contact the sender and delete the 
material from any computer.  Any views expressed in this message
are those of the individual sender and may not necessarily reflect 
the views of the company.  
-------------------------------------------------------------------------------------------------------


******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
* 
*   This email was sent to you via Structural Engineers 
*   Association of Southern California (SEAOSC) server. To 
*   subscribe (no fee) or UnSubscribe, please go to:
*
*   http://www.seaint.org/sealist1.asp
*
*   Questions to seaint-ad(--nospam--at)seaint.org. 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: http://www.seaint.org 
******* ****** ****** ****** ******* ****** ****** ********