Huawei RRU3971 Installation Manual page 84

Figure 7-38 Drilling holes and inserting expansion anchor bolts
(1) M10×80 bolt
1.
2.
3.
4.
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
Issue ()
(2) Nut
Use a hammer drill with a Ф12 bit to drill holes vertically at the marked anchor points with
the depth ranging from 55 mm (2.17 in.) to 60 mm (2.36 in.), use a vacuum cleaner to clear
the dust out from inside and around the holes, and measure the distances between holes. If
any of the hole is beyond the acceptable range, mark a new anchor point and drill a new
hole.
NOTICE
Take proper safety measures to protect your eyes and respiratory tract against the dust
before drilling holes.
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 into the hole completely.
Tighten and then loosen the expansion bolt, and remove the M10 bolt, spring washer, and
flat washer in sequence.
NOTICE
After dismantling an expansion anchor bolt, ensure that the top of the expansion sleeve is
on the same level as the wall. Otherwise, the device cannot be installed on the wall evenly
and securely.
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(3) Spring washer (4) Flat washer
7 Installing the RRU
(5) Expansion sleeve
Figure 7-39.
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