Presented at Sterlite office

2. INTRODUCTION
 Traditionally overhead transmission lines have
been built on lattice type structures.
 Significant ROW and aesthetics issues have
stalled construction of new transmission line
corridors.
 Solutions with narrow corridors and smaller
footprints became the crying need of the day for
completion of critical transmission corridors.
 Replacement of traditional structures with
monopole kind of structures is a significant step
in this direction.

3.  Less right-of-way
 Small foundations take less land and
hence reduce the foot-print.
 For Example a 132 kV Mono pole
can be erected within a foot print of
2 Mtrs.
 Efficiently erected along Highways
and Railway Lines
ADVANTAGES

4. ADVANTAGES
Monopole
Significant
Wind-Loading
Capacity
Smallest
Footprint of All
tower types
Less
Components,
Fast Installation
Good
Appearance
Flexibility in
design
Higher Reliability
under Extreme
Condition

5.  Steel monopoles are more flexible than
lattice towers
 In case of Broken wire more deflection of
steel pole can reduce the tension in the
intact span and bending moment at the base
 Round and Multi side design can reduce
wind load
 Steel Poles are more effective in case of
tornado or hurricanes
BETTER RELIABILITY UNDER
EXTREME CONDITION

6. Pole type Structure Lattice Structure
Tower Cost Itself More Less
Maintenance Cost Less More
Installation Cost Less More
Design Risk at Joints Less More
Flexibility More Less
Aesthetics Yes --
Land Occupation (ROW) Very Less High
Logistics Less More
Environment friendly Yes --
COMPARISON WITH LATTICE STRUCTURE

7.  Various structure configuration –
monopoles and frames.
 Different voltages and circuits on same
pole.
 Distribution under-built.
 Multiple circuits in different orientation.

8.  Consist of tapered steel tubes that fit over each other to form a
stable pole.
 May be guyed or self supported and be fitted with climbing
rungs where necessary.
 Sections should be made from hollow, heavy duty, thick steel
tubes, flanged steel tubes or low-alloy, high-strength steel.
 Shaft section should be a constant-tapered hollow steel section.
 Slip joints should be designed with suitable engineering
practices.
 Should be made from galvanized hollow steel pipes or high
strength steel
CHARACTERISTICS OF MONOPOLE

9.  Professional Design Team specializing in Transmission Poles
 Expertise of Designing as per all national and international Standards as
 Standards for Designing : Guide Line ASCE – 48 - 11
OUR DESIGN CAPABILITIES

10. MANUFACTURING PROCESS
Raw Material
Testing
Cutting
Molding and
Bending
Welding
Longitudinal
Dimension
Verification
Flange
Welding
Hole DrillingCalibration
Deburring Galvanization Package

11. MANUFACTURING FACILITY
Sheet Cutting Sheet Bending
Punching Welding Galvanizing

12.  Material :Hot rolled coil from Q235 to Q460, ASTM 573 GR65, GR50,
SS400, SS490, ST52-3
 Hot dip galvanized Following BS EN ISO 1461 -1999, ASTM A 123 or
any other standard by client required.
 Welding as per IS 813, AWS D 1.1
 Base Plate ASTM A 633 GRE
KEY SPECIFICATION

13. Steel Monopole sections are easily joined to each other to erect the tower.
STEEL POLE CONNECTION OPTIONS
Slip Joints Flange Joints

14. Erection of Steel Monopoles do not need much of foundation work.
We can erect the monopole by
STEEL POLE FOUNDATION OPTIONS
Concrete
foundation with
anchor bolts
Direct
Embedded
Caisson
Foundation

15. TESTING
Material Testing Dimension Testing
Galvanizing TestingCrack Detections (Welding Test)

16. Load testing can be arranged by the third parties :-
 CPRI (Central Power Research Institute)
 SERC (Structural Engineering Research Centre)
 Richardson & Cruddas
TESTING & VALIDATION

17. Pole Drawings Approved by APTRANSCO
APPROVALS

18. Drawings Approved by ECG, Ghana
APPROVALS

19. COMPARISON BETWEEN CONVENTIONAL LATTICE
TOWER WITH METALLIC CROSS ARM AND POLE
TYPE STRUCTURE WITH INSULATED CROSS ARM
VOLTAGE RATING 132 kV
No. of circuits 2
Wind Zone 5
Wind pressure 182 kg/m2
Conductor ACSR Panther
Earth wire 7/3.15
TYPE OF STRUCTURE : LATTICE TOWER MONOPOLE
Design span : 310 m 150 m
Description : “P" type “DA" type
Overall Height : 26970 mm 16400 mm
Footprint : 5860 mm 1190 mm

20. SUPREME & CO. PVT. LTD.
P-200, BENARAS ROAD, HOWRAH -711108, WEST BENGAL, INDIA
Phone : +91-033-26516701-05
Fax : +91-033-26516706
Email : sales@supreme.in & info@supreme.in
Website : www.supreme.in