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RE: REFERENCE TO HSS MOMENT CONNECTION

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Ben-

Only the connection has to be designed for Omega times the design load,
right?

Regards,

T. William (Bill) Allen, S.E. (CA #2607)
V/F (949) 248-8588
San Juan Capistrano, CA


:-----Original Message-----
:From: Ben Yousefi [mailto:Ben-Yousefi(--nospam--at)ci.santa-monica.ca.us] 
:Sent: Wednesday, July 16, 2003 11:24 AM
:To: seaint(--nospam--at)seaint.org
:Subject: RE: REFERENCE TO HSS MOMENT CONNECTION
:
:
:Bill and Bill
:
:There could be different explanations for why these frame are 
:getting built. The UBC still allows the OMF if it is designed 
:to Omega times the calculated seismic loads. 
:
:My point was that if you want to follow FEMA 350, and not have 
:to resort to testing or overdesigning the frame, there is no 
:prequalified moment connection using HSS members. 
:
:Ben, Yousefi, SE
:Santa Monica, CA
:
:>>> bill(--nospam--at)bsmstructural.com 07/16/03 09:26AM >>>
:Ben,
:
:I'm surprised to hear this.  I have seen MANY HSS to HSS 
:moment frames specified (and installed) by engineers in 
:seismic design regions.  Are the engineers making up this 
:acceptable through use of engineering mechanics?  The engineer 
:that introduced me to this system was originally from Los 
:Angeles who I believe to be a sharp designer.  I just want to 
:have a better understanding of why I have seen this so many 
:times, and designed them as well under the impression this was 
:acceptable.  Thanks.
:
:Bill S. Marczewski
:BSM Structural, LLC
:Astoria, Oregon
:
:
:
:-----Original Message-----
:From: Ben Yousefi [mailto:Ben-Yousefi(--nospam--at)ci.santa-monica.ca.us] 
:Sent: Wednesday, July 16, 2003 7:00 AM
:To: seaint(--nospam--at)seaint.org 
:Subject: Re: REFERENCE TO HSS MOMENT CONNECTION
:
:There is no such thing for seismic design!
:
:Currently there is no approved moment connection type, for 
:seismic application, using HSS section. All the tested 
:connections so far have been with rolled W sections. Even the 
:built up boxes are not approved at this time.
:
:Ben Yousefi, SE
:Santa Monica, CA
:
:
:
:
:
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