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- To: seaint(--nospam--at)seaint.org
- Subject: R for building/non building/ sub system
- From: "Vasu, Ravi" <Ravi.Vasu(--nospam--at)jacobs.com>
- Date: Mon, 13 Jan 2003 18:47:29 -0500
Title: R for building/non building/ sub system
Please refer to the " seismic guidelines for design of petrochemical faclities". section 18.104.22.168 for non building
structure & section 4.2.4 for subsystem.
1. The question is when do we consider a steel structure supporting a small vessel & exchanger in a two or three storied structure
(30 to 40' height) as a BUILDING STRUCTURE, so that we use R from table 16-N?
If the equipment wt. is less than 0.25(wt. of the structure), do we need to always consider lower R of equipment vs. the structure?
(appendix A, case 3 & 4) irrespective of the height or area (or 'building structure')
3. It looks like most of the structures supporting a vessel/exchanger fall in 'subsystems'. What should be the R for this?
I appreciate your time on this.
Ravi Vasu, P.E.,
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