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AISC Seismic 97

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Title: FW: OMF Design in Seismic Zone 4
For members in southern California who needs to get a copy of the 1997 AISC Seismic Provisions and Supplement No. 1, you can pick up a FREE copy at ICBO in Whittier.  You can also pick up a copy at any ICBO or SEAOSC Seminars where ICBO has a booth. 
 
For people who is not in the area, you can order one by calling ICBO Publication Department (800) 423-6587 and request on by mailed to you.  However, there will be a $7.50 shipping & handling charge.  Please mention item No. AISC97 when you place your order.
 
This information is provide by Mark Johnson of ICBO, Directors of Operations.  Please note that quantities may be limited.
 
Y. Henry Huang
-----Original Message-----
From: Charlie Carter [mailto:carter(--nospam--at)aiscmail.com]
Sent: Thursday, December 09, 1999 8:09 PM
To: 'seaint(--nospam--at)seaint.org'
Subject: FW: OMF Design in Seismic Zone 4

I'll take a crack at answering the connection detailing side of your inquiry.

The moment connection details in the AISC Manual are intended for wind and low-seismic applications, which means any case where you are permitted to (and choose to) use R equal to or less than 3. That generally corresponds to design and construction in accordance with the AISC Specification for Structural Steel Buildings, but not necessarily to the AISC Seismic Provisions.

Since you specifically stated that you are designing an OMF (which has R = 4), you'll have to meet the requirements in the AISC Specification for Structural Steel Buildings as well as the slightly more stringent ones in the AISC Seismic Provisions for Structural Steel Buildings. See Part I, Section 11 therein. Keep an eye on the SAC documents that are now available and shortly to be available as you will find some useful information for OMF design and construction in those as well.

Please note (as a side issue for completeness) that the 1997 AISC Seismic Provisions should be used in conjunction with the 1999 Supplement No. 1, which can be downloaded from www.aisc.org at this link.

<http://www.aisc.org/documents.asp?mode=docdetail&doc=153>

Hope this helps.

Charlie "BUST" Carter