Nortel Networks 1000M warranty Procedure Drilling concrete floors

Page 348 of 456 Installing earthquake bracing

Procedure 64

Drilling concrete floors

IMPORTANT!

This procedure applies only to installations into concrete floors.

1Using the equipment room floor plan mark the position of all of the columns.

2Center-punch each of the hole centers.

3Using a carbide-tipped drill bit, hammer drill the holes to the size and depth shown in Table 63 on page 348.

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.)

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.

4Should you hit reinforcing bar or the hole breaks through, abandon that hole and use the secondary hole location indicated in the anchor hole template.

5Remove any debris from the holes with a blowout bulb or compressed air. Use a vacuum to dispose of the debris.

6If the mounting plates are not to be installed immediately, cover the anchor holes to prevent debris from falling into them.

End of Procedure

NN43021-310 Standard 02.01 December 2007