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Re: UBC'97 "Elements, nonstructural, equipment"

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1997 UBC Equation 32-1 is an upper bounds maximum equation that bounds more than
99% of the recorded roof data in the studies that led to the nonstructural
equations.  As an upper bounds maximum it is conservative in many cases and very
conservative in most cases.  It is offered because it is easy to apply.

Drift criteria for nonstructural is addressed in 1997 UBC Section 1632.4.

Rick Drake, SE
Fluor Daniel, Aliso Viejo

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Attila Beres <Attila.Beres(--nospam--at)Englekirk.com> on 05/06/2000 11:16:39 AM

Please respond to seaint(--nospam--at)seaint.org

To:   Seaint Listserver posting <seaint(--nospam--at)seaint.org>
cc:

Subject:  UBC'97 "Elements, nonstructural, equipment"


Am I seeing this correctly:

1. The seismic force for an item, located at the roof, falling under section
1632, is independent of the dynamic characteristics of the building (unless you
go to a detailed study).  That is, no matter whether it sits on top of a one
story shear wall bldg. or a ten-story moment frame bldg. ?

2. Are deflection or drift limitations imposed for these items, e.g.
cantilevering parapets?

...........................................................................
Attila Beres, PhD, PE
Project Engineer

Robert Englekirk Consulting Structural Engineers, Inc.
Englekirk & Sabol Consulting Structural Engineers, Inc.
2116 Arlington Ave., Los Angeles, CA  90018-1398
323-733-6673, fax -8682        www.englekirk.com

Please note, that all communications from this e-mail address, that are not
directly related to a specific project of REI/ESI are to be considered as my
private opinion, and do not necessarily reflect the opinion of my employer.
...........................................................................