Huawei DBS3900 Installation Manual page 78

RRU3260
Installation Guide
Figure 8-38 Drilling a hole and inserting expansion anchor bolt assemblies
(1) M10x80 bolt
1.
Take proper safety measures to protect your eyes and respiratory tract against the dust before
drilling holes.
2.
3.
4.
After dismantling an expansion anchor bolt, ensure that the top of the expansion tube is on the
same level as the wall. Otherwise, the device cannot be installed on the wall evenly and
securely.
Step 4 Install the pole installation bracket on the expansion anchor bolts, place the flat washers,
spring washers, and nuts through the expansion anchor bolts in sequence, and then use a 16
mm (0.63 in.) torque socket to tighten the nuts to 30 N· m (265.52 lbf· in.), as shown in
8-39.
Issue 05 (2014-06-30)
(2) Nut
Use a hammer drill with a Ф12 bit to drill holes vertically at the marked anchor points.
Ensure that the depth of each hole ranges from 55 mm (2.17 in.) to 60 mm (2.36 in.).
Tighten the expansion anchor bolts slightly and place one vertically into each hole.
Use a rubber mallet to pound the expansion anchor bolt until it goes all the way into the
hole.
Tighten and then loosen the expansion bolt, and remove the M10 bolt, spring washer,
and flat washer in sequence.
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(3) Spring
(4) Flat washer
washer
8 Installing the RU
(5) Expansion
tube
Figure
70