1.4
EQUIPMENT REQUIREMENTS
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NOTE: Seismic control does not guarantee that the
equipment itself is rugged enough to survive
earthquake shaking. When a piece of equipment is
required to remain operational after an earthquake,
the manufacturer should be consulted regarding the
capabilities of the equipment to withstand seismic
loading.
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1.4.1
Rigidly Mounted Equipment
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NOTE: Rigidly mounted equipment is defined as
having a period of vibration of 0.06 seconds or less
for the equipment plus its mounting. Equipment with
a fundamental period greater than 0.06 seconds
should be assumed to be flexibly mounted or nonrigid
and designed in accordance with the next paragraph
below.
List items that may require additional
reinforcements (internally) to prevent permanent
deformation, dislocations, separation of components,
or other damage, which would render the equipment
inoperative for significant periods of time
following a seismic event and to meet the specified
requirements (such as engine-driven generators,
etc., which consist of a number of individual
components built into an assembly by the
manufacturers). For emergency generators include
auxiliary items required for the generator to
operate, such as battery racks and day tanks.
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The following specific items of equipment: [_____] to be furnished under
this contract shall be constructed and assembled to withstand the seismic
forces specified in TI 809-04, Chapter 10. Each item of rigid electrical
equipment shall be entirely located and rigidly attached on one side only
of a building expansion joint. Piping, electrical conduit, etc., which
cross the expansion joint shall be provided with flexible joints that are
capable of accommodating displacements equal to the full width of the joint
in both orthogonal directions.
Engine-Generators
Substations
Switch Boards and Switch Gears
Motor Control Centers
Free Standing Electric Motors
[_____]
1.4.2
Nonrigid or Flexibly-Mounted Equipment
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NOTE: The appropriate lateral force coefficient,
based on the guidelines in Section 13080 SEISMIC
SECTION 16070A
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