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Drilling concrete floors
— Flat washer, internal diameter = 0.812", outside diameter = 1.469",
thickness = 0.120", steel material, zinc plate finish
•
Kit B (NT8D64CF) contains four of the following items:
— Hilti HSL M16/25, box of 10, manufacturer part # 665934 (Hilti
Corporation (918) 252-6000)
Finally, to aid installation, four kits have been developed. The seismic anchor
hole template kit (NT8D64BH) provides a mylar template to aid floor
marking. Only one kit is needed for an installation and this kit is reusable.
The following tools are required to drill the holes for the anchor bolts.
•
dark marking pencil
•
center-punch
•
rotary hammer drill
•
carbide-tip drill bit:
— 25.4 mm (1 in.) diameter for Kit A, NT8D64BE
— 24.0 mm (15/16 in.) diameter for Kit B, NT8D64CE
•
blowout bulb or compressed air source
•
hammer or mallet
•
vacuum
DANGER
Wear safety goggles when drilling anchor holes. For
all drilling, use the appropriate tools and follow local
codes. Make sure to obey all safety and warning
precautions provided by the hammer drill and anchor
bolt manufacturers.
Installing earthquake bracing
Large System Installation and Commissioning
Page 331 of 436
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