Figure 1-17
Drilling holes and installing expansion bolts
(1) M10x80
expansion bolt
(2) Nut
(3) Spring
washer
(4) Flat washer
(5) Expansion
sleeve
1.
Use a hammer drill with Ф12 bore to drill holes vertically at the marked anchor points.
Ensure that the holes have the same depth ranging from 55 mm to 60 mm.
2.
Use a vacuum cleaner to clear the dust from inside and around the holes, and measure
the inter-hole spacing. If the spacing is too wide or too narrow, relocate positions and
drill holes again.
3.
Partially tighten an expansion bolt and vertically insert it into each hole.
4.
Use a rubber mallet to hit the expansion bolts until the entire expansion sleeve is in each
hole.
5.
Remove the M10×80 bolt, nut, spring washer, and flat washer in sequence.
NOTICE
Level the front of each expansion sleeve with the wall after disassembling an expansion bolt.
Otherwise, the mounting bracket will not be securely installed on the wall.
Step 3
Fit the Mounting bracket onto the wall through the four expansion bolts, and use an M10
socket wrench to torque the four expansion bolts to 28 N·m. See
Figure 1-18
.
RRU3931E
Installation Guide
1 RRU3931E Installation Guide
Issue Draft A (2016-03-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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