Power-Style™ QED-2 Switchboards
Section 4—Installation
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Anchoring for Seismic Qualifications
QED-2 equipment that is seismically certified has been qualified to the site-specific
seismic requirements of the listed model building codes and/or standards. Optional
construction features may be required, depending on the location of the installation and
the particular code and/or standard of interest. Seismic certificates of compliance are
provided with all seismically certified QED-2 equipment. To maintain the validity of this
certification, anchorage of equipment to the primary building structure is required.
Responsibility for Mitigation
of Seismic Damage
For the purposes of the model building codes, QED-2 equipment are considered
nonstructural building components. Equipment capacity was determined from triaxial
seismic shake table test results as defined in the International Code Counsel
Evaluation Service (ICCES) Acceptance Criteria for Seismic Qualification Testing of
Nonstructural Components (AC156). Unless otherwise indicated, an equipment
importance factor of 1.5 (Ip = 1.5) was used, indicating that equipment functionality was
verified before and after shaker table seismic simulation testing. This importance factor
is indicative of critical facilities where maximizing the probability of post event
functionality is a priority. ASCE/SEI 7 recognizes AC 156 as an appropriate
methodology for qualifying equipment to its requirements.
Incoming and outgoing cable and conduit must also be considered as related but
independent systems. They must be designed and restrained to withstand the forces
generated by the seismic event without increasing the load transferred to the
equipment. This system must be able to transfer the loads created by a seismic
event to the load-bearing path of the building structural system.
Maintaining Seismic
Certification
Seismic qualification of nonstructural components by Schneider Electric is just one
link in the total chain of responsibility required to maximize the probability that the
equipment will be intact and functional after a seismic event. During a seismic event,
the equipment must be able to transfer the loads that are created through the
mounting pad and anchorage to the load-bearing path of the building structural
system. The design engineer of record is responsible for detailing the equipment
connection and anchorage requirements for the given installation. The installer and
manufacturers of the anchorage restraint system are responsible for assuring that
the mounting requirements are met. Schneider Electric is not responsible for the
specification and performance of these systems.
