...
How
...
do
...
the
...
importance
...
factors
...
within
...
ETABS
...
relate?
...
Extended
...
Question:
...
There
...
is
...
an
...
importance
...
factor,
...
within
...
the
...
Shear
...
Wall
...
Design
...
Preferences
...
form,
...
which
...
defaults
...
to
...
1.0.
...
How
...
does
...
this
...
importance
...
factor
...
relate
...
to
...
the
...
Wind
...
and
...
Seismic
...
Load
...
Generator
...
importance
...
factor?
...
If
...
I
...
have
...
1.15
...
for
...
the
...
wind
...
importance
...
factor,
...
should
...
I
...
increase
...
the
...
value
...
listed
...
in
...
on
...
the
...
Shear
...
Wall
...
Design
...
Preferences
...
form?
...
Answer:
...
The
...
importance
...
factor
...
I
...
,
...
and
...
the
...
system
...
Deflection
...
Amplification
...
factor
...
Cd
...
,
...
specified
...
within
...
the
...
ETABS
...
Wall
...
Pier
...
/
...
Spandrel
...
Design
...
Preferences
...
form,
...
are
...
used
...
for
...
boundary-element
...
design.
...
These
...
values
...
are
...
independent
...
of
...
Auto-generated
...
Seismic
...
Load
...
specifications.
...
I
...
and
...
Cd
...
control
...
design
...
displacement
...
du
...
,
...
which
...
in
...
turn
...
controls
...
the
...
neutral-axis
...
equation
...
for
...
shear-wall
...
boundary
...
elements.
...
This
...
...
formulation
...
is
...
based
...
on
...
the
...
requirements
...
of
...
ACI
...
318-05
...
Section
...
21.6.6.
...
Additional
...
details
...
and
...
an
...
overview
...
are
...
given
...
in
...
the
...
materials
...
available
...
through
...
Help
...
>
...
Documentations
...
and
...
Tutorials
...
>
...
Shear
...
wall
...
design>
...
ACI
...
318-05
...
>
...
Wall
...
Pier
...
boundary
...
Element.
...
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