antenna installation guideline

7/30/2019 Antenna Installation Guideline

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TABLE OF CONTENTS

Introduction

Installation of Side Strut

Proper Mounting of Side Strut

Wrong Mounting of Side Strut

Affects of Wrong Mounting of Side Strut

Examples of Wrong Installation Works

Solutions

Conclusions


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INTRODUCTION

For protection against antenna shifting and deflection due to

harsh weather, side strut is used to reinforce the antenna assembly.

Misalignment is the most common problem encountered as a

result of poor side strut installation.

The purpose of this document is to provide additional

information and guide for the correct installation and mounting of

side strut.


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INSTALLATION OF SIDE STRUT

- Mount the end of the antenna side strut parallel as possible to the

antenna direction.

- The deviation angle should be 25o in any direction

- Consider the offset of the antenna in order to position the side

strut.


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INSTALLATION OF SIDE STRUT

Side strut

Example 4ft ANT


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PROPER MOUNTING OF SIDE STRUT

25o

25o

ODU

SIDE STRUT PIPE

25o Zone

POLE MOUNTING STRUCTURE

ANT. MOUNTING STRUCTURE

STRUT MOUNTING STRUCTURE

SIDE STRUT Fixing

Zone ( within 25o

)

Far end from mount

pole.

TOWER

The Axis of movementANT. MOUNTING POLE


Running

direction by

strong wind

The Axis area of movementANT. MOUNTING POLE


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WRONG MOUNTING OF SIDE STRUT

POLE MOUNTING STRUCTURE

ANT. MOUNTING STRUCTURE


TOWER

25o

25o

SIDE STRUT PIPE

Strut Fixing Zone

Impossible to setting Side Strut

Running direction

by strong wind

Axis zone


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AFFECTS OF WRONG MOUNTING OF SIDE

STRUT

1) The antenna leaves away from the tower.

2) With wrong offset, mounting of side strut become impossible to

attain.

3) Twisting and tearing of tower membrane from high wind pressure.

4) Damage of the lightning arrestor increases on Antenna and ODU.

5) Antenna Installation / orientation is more difficult

6) Disconnection and lose of connectors from wind pressure and

vibration


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EXAMPLE OF WRONG INSTALLATION WORKS

Antenna Mounting: Good

Side Strut Mounting: No Good

- Strut is mounted almost 90o

Antenna Mounting: No Good

Side Strut Mounting: No Good- Strut mounted on top


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EXAMPLE OF WRONG INSTALLATION WORKS

Antenna Mounting: No Good

Side Strut Mounting: No good

- strut is mounted at bottom

Antenna Mounting: No GoodSide strut Mounting: No Good

- strut is mounted almost 45o


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SOLUTIONS

Solution 1:

- Mount in same tower leg.

- Change offset (from Leftto right)

Solution 2:

- Mount in adjacent leg.

- Dont change offset


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CONCLUSION

With proper installation of the side strut and correct offset, therisk of deforming, misaligning the antennas and traffic outages

will be eliminated.

Always mount the side strut in parallel to antenna direction for

maximum stability.

antenna installation guideline

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