Performance Objective 1A.
The step-by-step
objective are illustrated by the flow chart in Figure 4-
procedures are similar to those in Table 4-6, and a
1.
flow chart illustrates these procedures in Figure 4-3.
b.
Enhanced Performance Objectives.
(3)
Performance Objective 3B (Immediate
Occupancy
for
Essential
Facilities).
This
(1) Performance Objective 2A (Safe Egress
performance objective for Seismic Use Group IIIE is
for Special Occupancy). This performance objective,
the most demanding objective applicable to buildings
for Seismic Use Group II, uses the same ground
governed by this document. The step-by-step design
motion as in Performance Objective 1A in Paragraph
and analysis procedures described in Table 4-7 and
4-11a above. Step-by-step procedures for analysis
the
flow
chart
in
Figure
4-4
illustrate
the
and design are provided in Table 4-6. Note that if
implementation of nonlinear elastic static analysis for
proper consideration is given in the selection of the
this objective.
analytical procedure for Performance Objective 1A,
the seismic effects may be scaled for compliance
with the prescribed acceptance criteria in Chapter 6.
4-12. Performance Objectives for Nonstructural
The design and analysis procedures for this
Systems and Components.
performance objective are illustrated by the flow
chart in Figure 4-2.
The
minimum
performance
objective
for
nonstructural systems and components will be similar
(2) Performance Objective 2B (Safe Egress
to structural Performance Objective 1A, as described
for Hazardous Occupancy and safe post-earthquake
in
the
preceding
paragraph
of
this
chapter.
protection of hazardous materials stored in these
Compliance with the provisions of Chapter 6 of
buildings). This performance objective, for Seismic
FEMA 302 will be considered as fulfilling this
Use Group IIIH, uses the same performance level as
minimum performance objective.
Provisions for
Performance Objective 2A, but requires this level of
enhanced performance objective and additional
performance for Ground Motion B (3/4 MCE). The
requirements
for
nonstructural
systems
and
seismic response effects for this ground motion can
components are provided in Chapter 10 of this
also be scaled from the initial analysis for
document.
4-13
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