Communication Server Large System Installation and Commissioning

Installing earthquake bracing Page 345 of 456
Communication Server 1000M and Meridian 1 Large System Installation and Commissioning
Selecting the kit
To select the applicable bracing and anchorage kits for your particular
installation, you must first determine the following site requirements:
• Identify system configuration (number of columns and modules per
column).
• Identify specification requirements (BELLCORE or CALIFORNIA
OSHPD).
• Determine site mounting floor parameters (this information can usually
be found in the engineering building drawings):
– concrete type (hardrock or lightweight aggregate),
– minimum concrete compressive strength (megapascals or psi),
– minimum concrete thickness
First, choose the appropriate module bracing kit using Table 61 on page 345.
Select a separate kit for each column of modules. For column expansion
(when an additional module is added to a column which already contains
seismic bracing), use the expansion bracing kit.
Note: The NT8D64CD kit contains neither bracing rods nor tie bars
because these are not needed for single-module installations. The
NT8D64BD kit does not contain mounting plates as these are not needed
for column expansion.
Table 61
Seismic Bracing Kits
Seismic Bracing Kit System configuration
NT8D64CD 1 module
NT8D64CA 2 modules
NT8D64CB 3 modules
NT8D64CC 4 modules
NT8D64BD expansion