Page 346 of 456 Installing earthquake bracing
Next, each column must also be secured to the floor. This is accomplished by installing one of two available anchor kits. Select the anchor kit by comparing the site requirements to Table 62 on page 346. This table shows that either anchor kit can be used to meet the CALIFORNIA OSHPD specification, but only Kit B meets the BELLCORE specification. For those installations where neither specification is required, Kit A is recommended due to its shallower concrete requirement.
Both anchor kits can be used in hardrock concrete as long as the compressive strength exceeds 20.7 MPa (3000 psi). Only Kit A can be used in lightweight aggregate concrete with a compressive strength greater than 27.6 MPa (4000 psi). The floor parameters for your installation can usually be found in the engineering building drawings.
Table 62
Seismic Anchor Kit
Kit | Seismic | BELLCORE | CAL | Concrete | Light- | |
Anchor Kit | OSHPD | thk (min) | weight | |||
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A | NT8D64BE | No | Yes | 90 mm | Yes | |
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| (3.5 in.) |
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B | NT8D64CE | Yes | Yes | 180 mm | No | |
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| (7 in.) |
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The kits listed in Table 62 on page 346 contain commercially available mounting hardware. You have the option of purchasing the contents directly from the manufacturer (using the listing below) or ordering the kits directly from Nortel.
•Kit A (NT8D64BE) contains four of each of the following items:
—Hilti HDI 3/4 in., box of 25, manufacturer part # 457564 (Hilti Corporation (918)
—Hex head bolt, 3/4 in.
