The force, Fp, shall be applied independently
Ip = 1.5
longitudinally and laterally in combination with
Storage racks in occupancies
service loads associated with the components.
with general access (e.g., warehouses or retail
Horizontal and vertical load effects shall be
stores).
combined as indicated in ASCE 7, substituting Fp for
Ip =
1.5
Components needed for
FEMA 302 shall be taken as equal to 1.0. When
continued operation of an essential facility (Seismic
positive and negative wind loads exceed Fp for
Use Groups IIIE).
nonstructural exterior walls, these wind loads shall
Ip = 1.0
govern the design. Similarly, when building code
All other components.
horizontal loads exceed Fp for interior partitions, the
specified building code loads shall govern the
10-2.
Architectural Components.
design.
a.
Introduction.
This paragraph defines
c.
Seismic Relative Displacement. Relative
architectural
components,
discusses
their
structural displacements that may affect the design of
participation and importance in relation to the
nonstructural systems and components shall be
seismic design of the structural system, and
calculated in accordance with Section 6.1.4 of
prescribes the criteria for their design to resist
FEMA 302.
damage
from
seismic
lateral
forces.
The
fundamental principle and underlying criterion of
d..
Component Importance Factor.
this paragraph are that the design of architectural
Compliance with the provisions in Chapter 6 of
components will be such that they will not collapse
FEMA 302 with Component Importance Factor, Ip,
and cause personal injury due to the accelerations
equal to 1.0 satisfies the acceptance criteria for
and displacements induced by severe seismic
Performance Objective 1A (Life Safety).
For
disturbances, and that the architectural components
buildings with enhanced performance objectives, a
will withstand more frequent but less severe seismic
Component Importance Factor of 1.5 will be
disturbance without excessive damage and economic
assigned to selected nonstructural components as
loss.
follows:
b.
Definition. Architectural components are
Ip =
1.5
Life safety component is
elements such as partitions, stairways, windows,
required to function after an earthquake.
suspended ceilings, parapets, building ornamentation
and appendages, and storage racks. They are called
Ip = 1.5
Component contains or can
architectural because they are not part of the vertical-
damage hazardous contents.
10 5
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