total lateral seismic force as prescribed by Equation
will be as prescribed in Chapter 6 with the
appropriate m values from Chapter 7.
5.2.6-1 or 5.2.6-2 of FEMA 302, as appropriate.
h.
Lateral Load on Nonstructural Systems and
(b)
Components crossing the isolation
Components Supported by Buildings.
interface. Elements of seismically isolated structures
and nonstructural components, or portions thereof,
that cross the isolation interface, shall be designed to
(1) General. Parts or portions of an isolated
withstand the total maximum displacement.
structure, permanent nonstructural components and
the attachments to them, and the attachments for
(c)
Components below the isolation
permanent equipment supported by a structure shall
interface. Elements of seismically isolated structures
be
designed
to
resist
seismic
forces
and
and nonstructural components, or portions thereof,
displacements as prescribed by this section and the
that are below the isolation interface shall be
applicable requirements of Chapter 10.
Buildings
designed and constructed in accordance with the
with isolation systems should use rigid horizontal
requirements of Section 5.2 of FEMA 302.
diaphragms or bracing systems above and below the
isolator level to provide deformation compatibility
i.
Detailed System Requirements. The isolation
among the resisting structural elements. When the
system and the structural system shall comply with
isolation system is located immediately above the
the material requirements of FEMA 302. In addition,
building foundations, a reinforced concrete slab or a
the isolation system shall comply with the detailed
system of tie beams should be provided for
system requirements of this chapter, and the
displacement compatibility among the footings or
structural system shall comply with the requirements
pile caps.
of this document and the applicable portions of
Section 5.2 of FEMA 302.
(2) Forces and displacements.
j.
Design and Construction Review.
(a) Components at or above the isolation
interface. Elements of seismically isolated structures
(1) General. A design review of the isolation
and nonstructural components, or portions thereof ,
system and related test programs shall be performed
that are at or above the isolation interface shall be
by an independent peer review team of registered
designed to resist a total lateral seismic force equal to
design professionals in the appropriate disciplines,
the maximum dynamic response of the element or
and others experienced in seismic analysis methods
component under consideration.
and the theory and application of seismic isolation.
Exception:
Elements
of
seismically
(2) Isolation system. Isolation system design
isolated structures and nonstructural components or
review shall include, but not be limited to, the
portions thereof are permitted to be designed to resist
following:
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