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FW: Daul System Vs. Hybrid System

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My understanding of a "dual system" is that there are two LLRS's in a given
DIRECTION.  For example, a shearwall system (coupled or cantilevered) and a
SMRF, not necessarily in the same line, but competing for loads when the
building is displaced in a particular direction.  Looking at it this way, a
building with a perimeter SMRF and an interior elevator core would satisfy
the dual system definition, as would a SMRF throughout a building that has
some bays infilled with concrete walls.

Regarding the "hybrid system", I'm not familiar with the definition.

Hope this helps.

T. Eric Gillham PE

-----Original Message-----
From: Joseph Harouni [mailto:yosi_h(--nospam--at)msn.com]
Sent: Saturday, July 07, 2001 5:24 AM
To: seaint(--nospam--at)seaint.org
Subject: Daul System Vs. Hybrid System


Hi,
Section 1629.6.5 of UBC (LABC) talks about two systems resisting the lateral
loads.
1. Are we talking about Daul System, where we have two systems in ONE LINE
of resisting the load or two different systems, each one in a DIFFERENT LINE
of resistance in a 3 dimensional building?
2. Moreover, is the definition of Hybrid System one of the definitions I
have given above?
Thanks,
Joseph Harouni


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