RadioFrame Networks Inc DH2 사용자 설명서
Method of Procedure
Pre-Installation
Pre-Installation
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RFN_3.1 Beta
Selected anchors shall meet standards set forth in NESS (Network Equipment
Building
Systems) TR-64 and ASTM (American Society For Testing and
Materials) 488-90 for earthquake compliance. This testing evaluates anchors for
bolt failure from shearing and from pullout or slippage. Compliance with these
standards requires that the anchor not allow a standard top heavy 7 ft. (2.2 m)
rack to have a deflection greater than 3 in. (7.6 cm) at the top of the frame. This
compliance will also adhere to Bellcore Technical Specifications AU-434 for
earthquake concrete expansion anchors.
standards requires that the anchor not allow a standard top heavy 7 ft. (2.2 m)
rack to have a deflection greater than 3 in. (7.6 cm) at the top of the frame. This
compliance will also adhere to Bellcore Technical Specifications AU-434 for
earthquake concrete expansion anchors.
Anchor selection criteria shall comply with all general requirements for standard
concrete anchors plus meet the above seismic requirements. All seismic
anchoring shall be enhanced with top cabinet or rack bracing.
concrete anchors plus meet the above seismic requirements. All seismic
anchoring shall be enhanced with top cabinet or rack bracing.
Seismic Considerations
All RadioFrame Networks equipment is seismically rated to withstand vibrations
of a Level 3 earthquake. The property owner is responsible for any damage to
RFN equipment due to building or rack structures that are not rated to withstand
vibrations of a Level 3 earthquake, or not secured to withstand vibrations of a
Zone 4 earthquake.
of a Level 3 earthquake. The property owner is responsible for any damage to
RFN equipment due to building or rack structures that are not rated to withstand
vibrations of a Level 3 earthquake, or not secured to withstand vibrations of a
Zone 4 earthquake.
Site protection from earthquakes may be required in certain areas. Typically, this
would be an area having historical data indicating a Moment Magnitude rating of
3 or 4. Note that areas other than historically prone areas may need
consideration. Obviously, addressing such concerns results in increased costs of
equipment installation.
would be an area having historical data indicating a Moment Magnitude rating of
3 or 4. Note that areas other than historically prone areas may need
consideration. Obviously, addressing such concerns results in increased costs of
equipment installation.
A certified architect specializing in earthquake-resistant installation shall be
consulted for seismic designs and recommendations in areas where the potential
loss of the site may outweigh associated costs of earthquake-resistant design. In
the United States, it is recommended to consult the US Geological Survey for
more information regarding earthquake probability and historical data for various
areas. In other areas, similar consultation should be done.
consulted for seismic designs and recommendations in areas where the potential
loss of the site may outweigh associated costs of earthquake-resistant design. In
the United States, it is recommended to consult the US Geological Survey for
more information regarding earthquake probability and historical data for various
areas. In other areas, similar consultation should be done.
•
The US Geological Survey information can be accessed at:
http://geohazards.cr.usgs.gov
http://geohazards.cr.usgs.gov
•
Seismic maps are available at:
http: //www.neic.cr.usgs.gov
http: //www.neic.cr.usgs.gov
Earthquake-resistant design should be contracted to a firm specializing in such
work. However, the following general considerations need to be observed and
factored into a seismic design program:
work. However, the following general considerations need to be observed and
factored into a seismic design program:
•
Equipment shall not be secured to both the shelter walls and floors, since
dissimilar movement between these surfaces is likely in an earthquake.
dissimilar movement between these surfaces is likely in an earthquake.
•
Mounting should provide for some "sway" in the overall equipment mounting,
thereby absorbing the energy of an earthquake. This is typically
accomplished by rigid mounting of racked equipment or cabinets at the base,
while semi-rigidly attaching the rack top using 1/8 in (3.2 cm) diameter steel
thereby absorbing the energy of an earthquake. This is typically
accomplished by rigid mounting of racked equipment or cabinets at the base,
while semi-rigidly attaching the rack top using 1/8 in (3.2 cm) diameter steel