User manual

Table Of Contents
Page 350 of 458 Installing earthquake bracing
NN43021-310 Standard 02.02 October 2008
Procedure 64
Drilling concrete floors
1 Using the equipment room floor plan mark the position of all of the
columns.
2 Center-punch each of the hole centers.
3 Using a carbide-tipped drill bit, hammer drill the holes to the size and
depth shown in Table 63 on page 350.
Note: Special care should be taken in drilling the holes. The holes have
to be drilled straight and perpendicular to the floor surface in order for the
anchors to be installed correctly. The drill fixture kit can aid this process.
4 Should you hit reinforcing bar or the hole breaks through, abandon that
hole and use the secondary hole location indicated in the anchor hole
template.
5 Remove any debris from the holes with a blowout bulb or compressed air.
Use a vacuum to dispose of the debris.
6 If the mounting plates are not to be installed immediately, cover the
anchor holes to prevent debris from falling into them.
End of Procedure
IMPORTANT!
This procedure applies only to installations into concrete
floors.
Table 63
Anchor hole sizes
Kit Order Code Hole diameter Hole depth
A NT8D64BE 25.4 mm (1 in.) 78.7 mm (3.1 in.)
B NT8D64CF 24 mm (15/16 in.) 125 mm (4 15/16 in.)