Structural System Performance Objectives
Performance Parameters
Minimum Analysis Procedures
Seismic Use
Performance
Ground Motion
Performance
Linear Elastic
Linear Elastic
Group
Level
Objective
with R Factors
with m Factors
2/3 MCE (A)1
√
I
LS(1)
1A
2/3 MCE (A)1
√2
√3
II
SE(2)
2A
MCE (B)1
√2
√3
IIIH
SE(2)
2B
MCE (B)1
√2
√3
IIIE
IO(3)
3B
1
MCE refers to the spectral ordinate values from the Maximum Considered Earthquake spectral
acceleration maps that accompany FEMA 302.
2
All buildings will be initially designed to comply with Performance Objective 1A using a linear elastic
analysis with R factors. This will establish the member sizes required to check compliance with the m
factor criteria for the enhanced performance objectives.
3
For certain buildings in Seismic Design Categories C, D, E, & F, the minimum analysis method to be used
may be a nonlinear static (or pushover) procedure. See paragraph 5-4b to determine when nonlinear
analysis procedures are required.
4
For buildings in Seismic Design Categories A and B, the analysis for enhanced performance objectives
may be performed with the applicable ground motion and a linear elastic analysis with the R and I factors
from Table 7-1 and the I factors from FEMA 302.
Table 4-4. Structural System Performance Objectives
4-10
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