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Re: x-brace...seismic slenderness (revised)[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)seaoc.org
- Subject: Re: x-brace...seismic slenderness (revised)
- From: "Dave Evans" <DEVANS(--nospam--at)tnhanc.alaska.net>
- Date: Thu, 12 Mar 1998 17:30:24 -0900
- >received: from tnhanc.alaska.net by tnhanc.alaska.net (UUPC/extended 1.12p/sm2) with UUCP for seaoc(--nospam--at)seaoc.org; Thu, 12 Mar 1998 19:15:03 +0900
- Priority: normal
Please trash my first post. In 1994 UBC Special concentric bracing members, the (KL/r) is limited whereas in 1997 UBC Special concentric bracing members, the (L/r) is limited. In both cases, the limit is 1000/root(Fy). The 1996 Blue Book definitions match the 1994 UBC definitions. The section referenced in the 1997 UBC is 2210 Section 10, on page 2-242, in the revisions to the AISC Seismic Provisions. I see it also conflicts with 97 UBC 218.104.22.168. Looks like a typo on pg 2-242. Sorry if this is too far off thread. It's vaguely related, considering the definition of L, unbraced length, as used in these slenderness limits, for x-braces in the out-of-plane mode. Dave Evans, P.E. TNH, Inc.
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