232269690 Steel Ohtl Poles Characteristic and Advantages

REN Conference 15.10-16.10 Oslo

STEEL OHTL POLES

CHARACTERISTIC

AND

ADVANTAGES

Tadeusz Turzanski

Jean Christophe Andre

Einar Karsten

VALMONTs HISTORY

1946

1954

1959

1960 1990

1981 2000

2001

Presence1970

19801968

founded 1946 in Valley (Nebraska, USA)

started with irrigation

2011: Valmont is listed at the NY stock exchange

with 90 locations and

appr. 10.000 employees

worddwide

Valmont Industries 3

Coatings

Irygtion

Our Markets

Lighting

Sygnaling &Transport

UTILITY

Telecommunikcation

Irigation Systems

What we do

Tubing

Coatings

Telecomm

Masts &Poles

Madrid, Spain

Creuzier-le-Neuf, France

Gelsenkirchen, Germany

Maarheeze, The Netherlands

Rive-de-Gier, FranceBay Minette, Alabama

Uberaba, Brazil

Jebel Ali, Dubai

Johannesburg, South Africa

St. Julie, Quebec,

Chicago, Illinois

Elkhart, Indiana

Minneapolis, Minnesota

Salem, Oregon

Tualatin, OregonAlbany, Oregon

Los Angeles, California

Long Beach, California

McCook, Nebraska

Omaha, Nebraska

Sioux City, Iowa

Waverly, Nebraska

West Point, Nebraska

Plymouth, Indiana

Canada

Berrechid, Morocco

Valley, Nebraska

Brenham, Texas

Monterrey, Mexico

Tulsa, Oklahoma

Jasper, Tennessee

Siedlce, Poland

Charmeil, France

Shanghai, China

Stainton, United Kingdom

Commerce, City, Colorado

Barstow, California

Bellville, TexasMansfield, Texas

Tuscaloosa, Alabama

Claxton, Georgia

Bartow, Florida

Farmington, MinnesotaEl Dorado, Kansas

Selbyville, Delaware

Heshan, China

Kangasniemi, Finland

Kiiu, Estonia

Qingdao, China

VALMONT Poland

ESTABLISHED 1994 as joint

venture VALMONT 70% and

MOSTOSTAL 30%

- Lighting

- High Masts

- Utility

- Telecommunication

- Tramway Poles

TELECOM

Self Supported

TRAMWAYS

Utility Poles

Different Geometry Poles

Steel Pole Basic Features

Tapered tubular shaft and arms

Shaft consists of multiple sections (typical 9-15m long)

High strength alloy steel

Used in 20kv to 750kv lines

Smaller foundation, less components and better

appearance than lattice tower

Steel Pole Variety of Options

Type - tangent, angle, dead-end

Circuit - single, double, multiple


Configuration - single pole, H-frame, Y-frame, X-frame, 3-pole structure


Support - self supporting, guyed


Sections connections: Slip joints, flange joints, and butt weld joints.


Foundations types concrete foundations with anchor bolts, direct embedded, and caisson foundations


Surface protection galvanizing, weathering steel, powder coating

Less Right-of-way

Smaller foundation takes less land

Efficiently placed along highways, roads, rail tracks

Can be installed at locations with very limited space

Better Appearance

Trend of city beautification

Remove visual pollution

Need structure compatible with environment

Bulky clutter lattice tower visually unpleasant

76% public prefer poles over lattice towers

Fast Installation

Typical steel pole only has 15 or less components

Whole structure can be assembled before erection

Multiple structures can be installed in one day

Flexibility in Design

Various structure configuration pole and frame

Different voltage circuits on same pole

Distribution under-built

Multiple circuit in different orientation

Adding lines for telephone, cable TV

Lower Total Installed Cost

Less land and right-of-way cost

Less installation time and cost

Structure cost pole maybe slightly more than tower

Pole has lower total installed cost

Reliable Performance Over Time

Effective corrosion protection

Engineered product

Controlled fabrication process and tolerance

Structural integrity maintained through service life

Full Scale Test

Better Reliability under Extreme Condition

Steel monopole more flexible than lattice tower, concrete or wood pole under heavy loads

In broken conductor case, bigger deflection of steel pole reduces tension in intact span and induces smaller bending moment at base

Round or multi-side profile induces less wind load

In past cases where lattice towers and wood poles failed in hurricane and tornado, no steel poles were damaged

.Height under

lower cross-

arm

Utilisation Lattice refDimension

atGL

Land

occupancy

(m)

Monopole

ref

Dimension

atGL

Land

occupancy

(m)

Land

occupancy

suspension and

small angle

H92 KN T4

H15

2.79m x

2.79m8.6

S3 F10-16-

25 T4 R1dia 0.97 0.94 11%

tension

medium angle

H92 TA T4

H15

3m x

3m9.9

S3 F40-52-

67 T4 R1dia 1.41 2.0 20%

tension large

angle

H92 SS1 T4

H15

4m x

4m17.6

S3 F90-

G15T4 R1dia 1.68 2.8 16%

suspension and

small angle

H92 KN T4

H24

3.92m x

3.92m16.9

S3 F10-16-

25 T4 Ydia 1.21 1.5 9%

tension

medium angle

H92 TA T4

H24

4.26m x

4.26m20

S3 F40-52-

67 T4 Ydia 1.62 2.6 13%

tension large

angle

H92 SS1 T4

H24

5.8m x

5.8m37

S3 F90-

G15T4 Ydia 1.92 3.7 10%

12%109.9 13.5

24m

90kV Single Circuit

Lattice tower MonopoleMonopole vs

lattice in %

15m

Monopoles & Towers land occupancy

Monopole vs

lattice in %

Height under

lower cross-

arm

Utilisation Lattice refDimension

atGL

Land

occupancy

(m)

Monopole

ref

Dimension

atGL

Land

occupancy

(m)

Land

occupancy

suspension and

small angleG4 NT B3 X

6.63m x

6.63m48.4

S2 KNT

H6 Ydia 1.95 3.80 8%

tension

medium angleG4 AS B3 X

7.13m x

7.13m55.921

S2 AS H6

Ydia 2.98 8.9 16%

tension large

angle

G4 S0S1 B3

X

7.13m x

7.13m55.921

S2 S1 H6

Ydia 3.66 13.4 24%

16%

30m

160.2 26.1

225kV Double Circuit

Lattice tower Monopole

European & US standards

EN 50341 1 Overhead electrical lines exceeding AC 45 kV; Part 1:General requirements - Common specifications; a new standard being introduced + NNA (national normative aspects for 20 European countries)

Old national standards still valid = NNAs

Currently most common standard for international projects -ASCE Manual No. 72, "Design of Steel Transmission Pole Structures", Second Edition, 1990 then called ASCE-SEI 48-05

Structural Welding Code - Steel, EN1011; ANSI/AWS D1.1-92, American Welding Society

Material EN 10025; ASTM A36/A36M Specification for Structural Steel;;

Galvanizing, EN 1461; ASTM A123 Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel

Assembly of tapered shafts by slip

joints

Assembly by slip joints

Slip length

Slip joint forcekN

Maxi

816

Mini

408

Mini

1670

Nominal

1820Maxi

1970

mm

OK if values within this

area

Steel Materials

ASTM A572 Grade 65 Ksi (450 Mpa) material for pole shaft.

Special silicon controlled steel (0.06% maximum).

ASTM A572 Grade 50 Ksi (345 Mpa) material for base-plate.

European SS400 and St-52 (355 Mpa) steel.

Major steel suppliers Nucor, Arcelor, Baoshan Steel and Wuhan Steel

Manufacturing

State-of-the-art facilities

Workforce has more than 35 years experience in transmission pole fabrication

Biggest equipment capability for pole making

Shared global technology and best practice

July 2008 47

Other solutions

Pre-cambering and raking

For strong angle poles and for EDS , not for tangent poles

In the cross-arms plan

Steel Transmission Pole Examples

Steel Transmission Pole

Steel Transmission Pole Examples

Substation A-frame, H-frame

Substation Structure

Summery

Unlimited possibility to design the pole

Less elements much quicker erection

Small area of foot print

Beter resistance to extrem loads.

Vandalism protection

Long service life

Less visual pollution - aesthetic design

Thank you

THANK YOU

REN Conference 15.10-16.10 2013 Oslo

232269690 Steel Ohtl Poles Characteristic and Advantages

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Transcript of 232269690 Steel Ohtl Poles Characteristic and Advantages