Seismic requirements

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Author Message Anonymous   Posted on Friday, August 08, 2003 - 08:29 am:    How are seismic requirements specified? Do you use a Div. 1 Section that provides general information to which each tech Section can refer? Do you delegate actual design of devices [hangers, bracing, etc.] to the vendors and their design professionals? Do you use consultants for this design work? What items do you include or cover with your seismic requirements? Just how extensive do you go with actual design and specifying, or do you mainly rely on issuing design performance criteria? Robert E. Woodburn, RA, CCS, CCCA,CSI Senior Member Username: Bob_woodburn Post Number: 7 Registered: 05-2003 Posted on Friday, August 08, 2003 - 10:09 am:    For one application, see UFGS Section 13080, Seismic Protection for Miscellaneous Equipment, available for free download (along with the SpecsIntact software used to view and edit it) at www.ufgs.org/ufgs/ufgs.htm (It may also be available somewhere as a pdf file.) The notes to specifier in that section explain that it is no longer based on the old standard (which I believe includes the criterion cited) but on a newer standard, TI 809-04, available at www.hnd.usace.army.mil/techinfo/ti/809-04/ti80904.htm The notes to specifier say, in part: "This guide specification covers the requirements for seismic structural elements for protection of mechanical, electrical and miscellaneous equipment. This guide specification will be used in conjunction with Sections 15070 SEISMIC PROTECTION FOR MECHANICAL EQUIPMENT and 16070 SEISMIC PROTECTION FOR ELECTRICAL EQUIPMENT... "The intent of this specification is to provide for adequate resistance to lateral forces induced by earthquakes for listed mechanical, electrical and miscellaneous equipment and systems. The design seismic lateral forces are in addition to the "normal" gravity forces (weight) acting on the components of a system. "Seismic protection will no longer be based on the guidance provided in TM 5-809-10 which includes seismic zone, importance factors, and building categories. Seismic protection design for anchorage and bracing of all equipment will be based on TI 809-04. The designer will ensure that the A-E and/or Contractor has access to TI 809-04. "The designer has 3 options to provide seismic protection for a project: "1) Hire an A-E who will use this section and will submit calculations and drawings stamped by a registered engineer. The Contracting Officer will "accept" the design but the registered engineer (Engineer of Record) will have final responsibility for the adequacy of the structural members and their connections. "2) Issue a contract requiring the Contractor to hire a registered engineer to submit the stamped calculations and drawings in accordance with this section. The contracting Officer will "accept" the design but the registered engineer (Engineer of Record) will have final responsibility for the adequacy of the structural members and their connections. "3) Perform the design in house, in which case the Government designer will have final responsibility for the adequacy of the structural members and their connections. "Regardless of who performs the design, this section, properly edited, must be included in the construction documents to allow the Contractor to install the seismic protection features." Anonymous   Posted on Friday, August 08, 2003 - 12:08 pm:    "www.ufgs.org/ufgs/ufgs.htm" is a dead link Robert E. Woodburn, RA, CCS, CCCA,CSI Senior Member Username: Bob_woodburn Post Number: 8 Registered: 05-2003 Posted on Friday, August 08, 2003 - 12:32 pm:    It should have been www.ccb.org/ufgs/ufgs/htm. Sorry. (By the way, you don't need the SpecsIntact software just to view these: It says "VIEW a section (PDF format) with free AdobeReader by clicking on the section number.") (The cited reference in my post was remembered from a recent message in a related thread -- "Heard of this?" -- my memory may have failed me there, too...was it "exposure" or "importance"?) Ronald L. Geren, RA, CSI, CCS, CCCA New member Username: Specman Post Number: 2 Registered: 03-2003 Posted on Friday, August 08, 2003 - 06:27 pm:    "www.ccb.org/ufgs/ufgs.htm" is the correct URL. There is a dot, not a slash, before "htm". John Regener, AIA, CCS, CCCA, CSI, SCIP Senior Member Username: John_regener Post Number: 99 Registered: 04-2002 Posted on Friday, August 08, 2003 - 08:48 pm:    H-here in Cali-ffornia, w-we just d-d-don't wor-rrry about th-things that sh-sh-shake. Our specs-s-s rely on refer-r-rences to the good ol' b-b-building code. Es-especial-ly-ly for schoo-ools and hospit-itals, Sta-ate agencie-ies have extrem-ely high re-requirements that exce-eeed Feder-eral require-irements. Jerome J. Lazar, RA, CCS, CSI, SCIP Senior Member Username: Lazarcitec Post Number: 12 Registered: 05-2003 Posted on Saturday, August 09, 2003 - 07:32 am:    Building Seismic Safety Council (BSSC) 1997 & 2000 versions of NEHRP Provisions for New Buildings and other Structures is in PDF form and downloadable: http://www.bssconline.org/index.html Dennis Hall (Unregistered Guest) Unregistered guest Posted on Monday, August 18, 2003 - 12:26 pm:    MF 04 will provide space in Div. 1 for per-r-formace req-u-irement t-that apppply to more than one Sect-ion or Division. Sei-m-atic requirements could be spec-i-fied in this one location.