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DBS3900 LampSite
Installation Guide

7 Installing a pRRU3901

Issue 08 (2016-05-30)

Huawei Proprietary and Confidential

Installing a pRRU3901 on a ceiling

When a pRRU3901 is installed on a ceiling, installation modes vary with the quality of the
ceiling, as shown in Table 7-3.

Table 7-3

Ceiling-mounted suggestion

Installation
Mode

Requirements

Mounting Brackets

Installation
Diagram

Installing the
pRRU3901 on
a ceiling by
drilling holes

For details, see
7.4.3 Installing
a pRRU3901
on a Ceiling.



The ceiling, such
as a concrete
ceiling, can bear
a load at least
four times the
weight of the
pRRU3901.



The screws must
be tightened with
a torque of 10
N·m. This
ensures the
screws work
properly and the
ceiling remains
intact without
cracks in it.

1.  Plate
2.  Screw (M6X50)
3.  Plastic expansion

sleeve

4. Flat washer

Installing the
pRRU3901 on
a ceiling using
a V clamp
through an
attachment
plate

For details, see
7.4.5 Installing
a pRRU3901
on a Plate.



The ceiling, such
as a concrete
ceiling, can bear
a load at least
four times the
weight of the
pRRU3901.



The thickness of
the ceiling is less
than 80 mm.

1.  Plate
2.  V clamp
3.  Bolt (M6X80)

Installing the
pRRU3901 on
a pole

For details, see
7.4.4 Installing
a pRRU3901
on a Pole.

A pole under the
ceiling can bear a
load at least four
times the weight of
the pRRU3901.

Installing the
pRRU3901 on
a keel

For details, see
7.4.6 Installing
a pRRU3901

A keel under the
ceiling can bear a
load at least four
times the weight of
the pRRU3901.