concrete pole

8/12/2019 Concrete Pole

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U T I L I T Y P O L E S


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StressCrete is the registered trade mark

of StressCrete Ltd., an Ontario corpora-

tion and StressCrete Inc., an Alabama

corporation. StressCrete poles have

been in use throughout North Americasince 1953.

It is our objective to use the most

advanced technical knowledge available,

plus state of the art equipment to manu-

facture the highest quality product pos-

sible. It is also our goal to offer our cus-

tomers the highest level of service and

technical backup possible. Our product

is available through an experienced and

PRIDE INOUR PEOPLE. PRIDE INOUR PRODUCT.

well educated team of manufacturers

agents who service utility, contractor

and distributor accounts.

Our product is a centrifugally cast rein-forced concrete pole; commonly referred

to as a Spun Pole. It combines ele-

gance with durability and surpasses most

other materials in economy. It meets the

CSA and ASTM standards for spun con-

crete poles, as well as our own specifica-

tions which are more demanding. The

spinning process introduces qualities

into the concrete which cannot be

obtained by more conventional casting

methods. It provides a higher density and

greater strength concrete which is more

resistant to freeze-thaw and scaling by

de-icers. As well, the centrifugal casting

process automatically forms a hollow

raceway inside the pole thereby providing

a smooth conduit for electrical cables.

All our poles are custom made whatev-

er the design. An individual work order is

issued to the plant, a copy is sent to thecustomer and one held in our files.

Production is geared to your order

specification and delivery requirements.

Poles are readily available in a full

range of lengths, strengths, colors, finish-

es and cross-sections for a multitude of

uses such as lighting, power distribution,

transmission, traffic, traction and commu-

nication towers.

Most poles may be equipped with steel

base plates for flush mounting installations,

although direct embedment is the norm.

Our Companies

Our Policy

Our Product

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engineering staff will be pleased to assist you inestablishing and designing for the appropriate loads.

There are three common ways used to select poles fordistribution and transmission use. As all our products arecustom designed, owners have a choice as to theirpreferred method.

Satisfying the Applied Design Loads

Spun Concrete - The Ideal Utility Pole

A Spun concrete pole like any pole supportingconductors, has loads applied by line tension, changesof line direction, wind, and where applicable, ice load-ings on both the conductors and the pole itself.

Because of their durability and reliability, spun concretepoles have a favorable load factor specified in ANSItransmission and distribution line requirements. Our

The crisp clean lines and light gray color of spun concrete poles are pleasing tothe eye.

Spun concrete poles give a street a more formal look than wood poles. This projectsa progressive image for both the utility and the municipality and enhances the valueof adjoining property.

Appearance

Experience has shown, that during its long life, a spun concrete pole ismaintenance free.

Concrete, unlike other materials, suffers no loss of strength over the years, beingresistant to woodpeckers, insects, fire, rot and corrosion.

Its durability in soil permits the economy of direct burial without the use ofcontaminating chemical treatments.

As an inert material, it can be recycled or accepted as clean fill, when its longlife is over.

Durability

Spun concrete poles are manufactured in a wide range of strengths and sizes, to fillmany needs.

By choosing appropriate classes, angle and termination poles can remain unguyedthereby saving space and eliminating clutter.

Spun concrete poles are manufactured to guaranteed minimum strengths, takingthe guess work out of line design.

Strength & Availability

The hollow raceway of spun concrete poles makes them ideal for joint useapplications, such as streetlighting, telephone and cable TV.

The ability to add handholes and wiring access openings increases versatility. Exact placement of prefabricated holes, inserts or couplings can reduce rigging

time by as much as 50%. In highly visible areas, where a particular architectural appearance is critical, a

Decor color can be supplied. As a manufactured product spun concrete poles are readily available, and supply

does not depend upon the vagaries of nature. The stiffness of spun poles make them particularly suitable for angle and

termination poles subjected to permanent transverse load.

Added Features

The use of spun concrete poles for electrical power transfer has many advantages over other materials.

Since 1953


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When concrete poles are substituted in areas where theprior experience has been obtained using wood poles, itis important to note the following:

Because wood is a naturally grown product, with naturaldefects, such as splits and knots, strength is defined as

the average strength of all poles of that species anddimension, at the time of installation. Since some polesin a batch will have strengths less than the average (upto 30% less) and since there is a further deteriorationwith time, a particular wood pole could have a strengthof only one half the specified average new strength ofthe class.

A. Selection by Experience

B. Selection by Tip Load Computation

In contrast, the strength of concrete poles is defined asa minimum strength, which does not vary with time.Poles are designed and manufactured so that all poleswill exceed the specified minimum strength which willbe present for the life of each pole.

In theory, therefore, concrete poles strengths could benumerically specified as half of those specified for awood pole line and be equally effective when installed.In fact, most owners do not go this far. It is commonpractise to specify a concrete pole, which has anumerical strength value two classes lower than wouldbe traditionally used for a similar wood pole application.

Poles are grouped in alphabetically labelled classes

which have a bending capacity appropriate to the designrequirements.

The class is defined in terms of a guaranteed minimumultimate transverse load applied 2 ft. down from the tipof the pole. All poles which can sustain the same tip loadhave the same class. This should not be confused withthe classification systems used with other materials suchas wood. As explained in the previous section "SelectionBy Experience" wood poles are classed according to anaverage, not minimum ultimate transverse load as withspun concrete.

The ground line moment capacity will, of course, depend

on the length of the pole, since that moment is theproduct of the class ultimate load and the distancebetween the point of application (2 ft. from the tip), andthe ground line.

Nevertheless, for applications where all poles havethe same or similar length, some owners have becomeaccustomed to the practise of specifying ground linemoment, when ordering. If so requested we will bepleased to fill orders placed this way.

CDEFGH

120015001900240030003700

5.36.78.510.713.316.5

JKLMNO

4500540064007500870010000

20.024.028.533.438.744.5

Class Min. UltimateTransverse load

(lbs.) (KN)

Class Min. UltimateTransverse load

(lbs.) (KN)

Standard Spun Concrete Utility Pole Classes

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NOTES:

1. ALL LOADS SHOWN IN POUNDS2. ALL LOADS INCLUDE APPROPRIATE LOAD OCF'S.3. IN ADDITION TO THE LOAD CONDITIONS SHOWN THE

STRUCTURE SHALL WITHSTAND:A. A 10 PSF WIND APPLIED TO THE POLE SHAFT

& ALL ATTACHMENTS AT THE MOST CRITICALDIRECTION, WITH NO WIRES ATTACHED.

B. A HORIZONTAL LOAD OF 2800 POUNDS PERPENDICULARTO THE OF THE INSULATORS & APPLIED AT THEWIRE ATTACHMENT POINT. APPLY TO ANY ONE INSULATOR.

C. A VERTICAL LOAD OF 2800 POUNDS AT THE END OFANY ONE INSULATOR.

4. DEFINITION OF LOAD DIRECTION:

VERTICAL LOAD

HORIZONTAL LOAD ALONG THE X-AXIS,PARALLEL TO THE OF INSULATOR.

HORIZONTAL LOAD ALONG THE Y-AXIS,PERPENDICULAR TO OF INSULATOR.

5. "WIND ON POLE" LOAD SHALL BE APPLIED UNIFORMLYALONG THE POLE SHAFT AT THE MOST CRITICAL HORIZONTALDIRECTION.

CL

For higher voltage lines, with large conductor spacingsand multiple circuits, there may be major reactionsdistributed over a substantial length of the pole. Theremay also be many different load combinations along aline, depending on pole spacing and line angles.

For such applications it is usual for the customer to

order by specifying a "load tree", for each pole loading

C. Selection by Load Tree

Example of Typical Load Tree

variation along the line. Alternatively, we can computesuch a tree from data provided by the purchaser.

We have a standard computer program set up to acceptmultiple elevations at which loads can be applied, sothat the required capacity of the pole can be accuratelycomputed along its whole length. We will be pleased, to

discuss the use of this program to meet any individualowners specification.

CL

CL

450

10 PSF ONPOLE

GROUNDCLEARANCE

EMBE

DMENT

7' 0"

41' 9"

6' 0"

6' 0"

9' 0"

450

450

740

740

740

450

620

Since 1953


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PoleCatalogueNumber

Spun Concrete Distribution Poles

Distribution Poles

Spun concrete distribution poles are generally selectedby strength class (Tip Load Computation). We stronglyrecommend you read "Satisfying The Applied DesignLoads" located on the previous page.

While it is standard practise to locate and cast neededholes, apertures, inserts etc. at the time of production,many utilities minimize the likelihood of future fielddrilling by adding extra holes to allow for later expansion

of the service. This practise can appreciably add to thealready considerable versatility of spun concrete polesand is both simple and inexpensive.

The catalogue numbers of the more common sizes andstrength classes along with accompanying technicaldetails are shown below. If the pole you require is notshown, please call your local representative or our salesoffice.

E - 300 - CPR - G

E - 300 - DPR - G

E - 300 - EPR - G

E - 300 - FPR - G

E - 350 - CPR - G

E - 350 - DPR - G

E - 350 - EPR - F

E - 350 - FPR - G

E - 400 - CPR - G

E - 400 - DPR - G

E - 400 - EPR - G

E - 400 - FPR - G

E - 450 - DPR - G

E - 450 - EPR - G

E - 450 - FPR - G

E - 450 - GPR - G

E - 500 - DPR - G

E - 500 - EPR - G

E - 500 - FPR - G

E - 500 - GPR - G

E - 500 - HPR - G

E - 550 - DPR - G

E - 550 - EPR - G

E - 550 - FPR - G

E - 550 - GPR - H

E - 550 - HPR - G

E - 600 - FPR - G

E - 600 - GPR - G

E - 600 - HPR - G

E - 650 - FPR - G

E - 650 - GPR - G

E - 650 - HPR - G

E - 700 - FPR - G

E - 700 - GPR - G

E - 700 - HPR - G

30' 0"

30' 0"

30' 0"

30' 0"

35' 0"

35' 0"

35' 0"

35' 0"

40' 0"

40' 0"

40' 0"

40' 0"

45' 0"

45' 0"

45' 0"

45' 0"

50' 0"

50' 0"

50' 0"

50' 0"

50' 0"

55' 0"

55' 0"

55' 0"

55' 0"

55' 0"

60' 0"

60' 0"

60' 0"

65' 0"

65' 0"

65' 0"

70' 0"

70' 0"

70' 0"

C

D

E

F

C

D

E

F

C

D

E

F

D

E

F

G

D

E

F

G

H

D

E

F

G

H

F

G

H

F

G

H

F

G

H

27.6

34.5

43.7

55.2

33.0

41.2

52.2

66.0

38.4

48.0

60.8

76.8

54.7

69.3

91.2

109.5

61.5

77.9

98.4

123.0

151.7

68.2

86.4

109.2

136.5

168.3

120.0

150.0

185.0

130.8

163.5

201.6

141.6

177.0

218.3

5

4

3

2

5

4

3

2

5

4

3

2

4

3

2

1

4

3

2

1

H1

4

3

2

1

H1

2

1

H1

2

1

H1

2

1

H1

25' 0"

25' 0"

25' 0"

25' 0"

29' 6"

29' 6"

29' 6"

29' 6"

34' 0"

34' 0"

34' 0"

34' 0"

38' 6"

38' 6"

38' 6"

38' 6"

43' 0"

43' 0"

43' 0"

43' 0"

43' 0"

47' 6"

47' 6"

47' 6"

47' 6"

47' 6"

52' 0"

52' 0"

52' 0"

56' 6"

56' 6"

56' 6"

61' 0"

61' 0"

61' 0"

5' 0"

5' 0"

5' 0"

5' 0"

5' 6"

5' 6"

5' 6"

5' 6"

6' 0"

6' 0"

6' 0"

6' 0"

6' 6"

6' 6"

6' 6"

6' 6"

7' 0"

7' 0"

7' 0"

7' 0"

7' 0"

7' 6"

7' 6"

7' 6"

7' 6"

7' 6"

8' 0"

8' 0"

8' 0"

8' 6"

8' 6"

8' 6"

9' 0"

9' 0"

9' 0"

6.5"

6.5"

6.5"

6.5"

6.5"

6.5"

6.5"

6.5"

6.5"

6.5"

6.5"

6.5"

6.5"

6.5"

6.5"

8.25"

6.5"

6.5"

6.5"

8.25"

8.25"

6.5"

6.5"

6.5"

8.25"

8.25"

6.5"

8.25"

8.25"

6.5"

8.25"

8.25"

6.5"

8.25"

8.25"

11.9"

11.9"

11.9"

11.9"

12.8"

12.8"

12.8"

12.8"

13.7"

13.7"

13.7"

13.7"

14.6"

14.6"

14.6"

16.35"

15.5"

15.5"

15.5"

17.25"

17.25"

16.4"

16.4"

16.4"

18.15"

18.15"

17.3"

19.05"

19.05"

18.2"

19.05"

19.05"

19.1"

20.85"

20.85"

1740

1755

1760

1955

2225

2250

2280

2435

2685

2715

2745

3000

3220

3230

3560

4235

3850

3865

4150

4970

5060

4455

4480

4900

5750

5875

5680

6550

6675

6310

7440

7510

7255

8365

8445

NominalPole

Length(ft.)

UltimateMomentAt Grade(K - ft.)

Equiv.Wood

PoleClass *1

AboveGradePole

Height(ft.)

BurialDepth *2

PoleTip(in.)

DiameterButt(in.)

NominalPole

Weight(lbs.)

ConcretePoleClass

TYPICAL POLECROSS-SECTION

TYPICAL 45' CLASS E JOINTUSEDISTRIBUTION POLE

* 1 Please read the section "Satisfy the Design loads" especially - "Selection by Experience".

* 2 Burial Depths are assumed at 10% of pole length plus 2 ft.

SLACKLONGITUDINALREINFORCEMENT

MOLD SEAMLINE

SPIRAL REINFORCEMENT

PRESTRESSEDSTAND

Since 1953

.


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desired, the internal raceway may be used to carry thecables rather than banding them to the outside of thepole: this greatly improves appearance. The poles canalso accommodate fuses, arresters and switchgear ifrequired. Non-guyed poles can be designed to accept

angles of up to 90.

If unfamiliar with designing poles of this type, pleasecontact our sales office so the correct pole for yoursituation can be determined. For poles with highimbalanced loads, foundations to suit the load and soilconditions must be considered.

Unguyed Terminal and Angle Poles

High Voltage Transmission Poles

In areas where unsightly back guys are eitherundesirable or impractical, a self-supporting spunconcrete pole is the solution. Spun concrete poles canbe designed and built to such great strengths that theneed for back guying is unnecessary. They give a clean

uncluttered look to the pole line, and minimize landuse as they do not impede walkways, violate privateproperty nor require overhead guys to be strung acrossroadways.

Non-guyed termination poles lend themselves to apleasing transition from overhead to underground. If

Spun concrete pole designs are exceptionally versatile

and an almost unlimited selection of heights andstrengths is available. Spun concrete transmission polesare generally single pore or H-Frame structures.

H-Frame poles are usually selected by strength class(Tip Load Computation) and since concrete poles aregenerally replacing damaged wood poles, the concreteclass can be determined by the owner's previousexperience with wood poles. Please read "Satisfying TheApplied Design Loads" in particular entitled "SelectionBy Experience" located earlier in this section.

Single pole transmission structures, due to the

complexity of the loads being applied are generallycustom designed to individual requirements. It iscommon for the customer to make available a "load treediagram", for each pole loading variation or to supply thedata from which such a "load tree" can be computed.

We would be pleased to consult with you regardingyour needs in this area. Please contact your localrepresentative or call one of our sales offices.

LADDERLUG DETAILHOT DIPPED GALV. STL. ASTM A36, 36 KSI MIN. YIELD STRENGTH

POLEFEATURES

POLESTRUCTURE

SECTION A-A SECTION B-B

Typical Transmission Pole Layout

SPECIFICATIONS

POLE LENGTH

QUANTITY REQUIRED

TIP O.D.

BUTT O.D.

TAPER

NO. OF STRANDS

SIZE OF STRAND

INITIAL PULL PER STRAND

RAM AREA OF JACK

GAUGE READING

MAKE UP REBAR

QUANTITY

SPIRAL

28 DAY STRENGTH/DET. STR.

CONCRETE VOLUME

WEIGHT

CENTRE OF GRAVITY

67' 0"

50

8.25"

19.95'

.18"/LIN/FT.

6

1/2" - 270KSI

13183 Kg

43.3 CM2

320 Kg/cm2

5/8" REBAR 80,000 PSI

(4) - 17'

(4) - 32'

.150 O.D. GALVANIZED

8,000 PSI

48 CU. FT.

7,620 lbs.

45' FROM TIP


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ANOMINAL

HOLE DIA.

Through Holes

Handholes and Coverplates

Wiring Apertures

Utility Pole Accessories

STANDARD HOLE POSITIONING IS 45"TO THE MOLD SEAM LINE. LONGITUDINALREINFORCING STEEL IS POSITIONED AWAYFROM THESE AREAS TO ALLOW FOR FIELDDRILLING IF NECESSARY. WE DO HOWEVERRECOMMEND THAT ALL HOLES BE CASTIN AT TIME OF MANUFACTURE. THIS ISESPECIALLY SO FOR HOLES REQUIREDOFF THE 45" LINE.

OUR STANDARD HANDHOLES ARE COMPOSED OF NON-METALLIC, NON-CONDUCTIVE INJECTION MOLDED MATERIAL AND ARESUPPLIED WITH A CLOSE FITTING INSET COVER OF THE SAME MATERIAL. ALL FASTENERS WILL BE STAINLESS STEEL.

STANDARD

SIZES

1/2"

3/4"

1"

OUR STANDARD HOLE SIZES ARE 1/2", 3/4" AND 1" NOMINAL SIZE.

225

180

135 45

315

0 MOLD SEAM

CLOSEFITTINGCOVERPLATE

STAINLESS STEELFASTENERS

CASTIN HAND HOLE

FRONT VIEW CROSS SECTION

TYPICAL CROSS SECTION

* AVAILABILITY MAY BE GOVERNEDBY DESIGN LIMITATIONS OR PHYSICALCONSTRAINTS.

STANDARD

SIZES

A x B

2 1/2" x 8"

3 1/2" x 10 1/2"

ROUND

APERTURES

A DIA.

1 1/4" DIA.

1 1/2" DIA.

SHAPED

APERTURES

B x C

1 1/2" x 3"

2" x 3"2 1/2" x 5"

3" x 12"

4" x 10"

* 6" x 24"

"A"

"A" DIA. "A" DIA.

"A"

"B"

"C"

"B"

FRONT VIEW CROSS SECTION

ROUNDAPERTURE

CABLEENTRY

.


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Pole Steps

Ladder System (Ladder by Others)

Ladder System (Supplied by StressCrete)

STEPS ARE SET AT 180 TO EACH OTHER EXCEPT ON THE LARGER POLES WHERE THEY MOVE TO 120AT THE POINT WHERE THE POLE DIAMETER SURPASSES 19".

CLIMBING LADDERCAT. NO.: "CL72"*

WORKING LADDERCAT. NO.: "WL72"*

LADDERCLIP

1 1/2"

3 1/2"

1 5/8"

5/8" MIN.

5"

16"16"

72"72"48"

12 3/4"

11 1/4"

LADDER STEP

MOUNTINGLEG

LADDER LUG DETAILHOT DIPPED GALV. STL.

DETAILED BELOW ARE STANDARD TYPES. SPECIFIC L ENGTHS ARE AVAILABLE UPON REQUEST.

* INDICATES LADDER LENGTH IN INCHES. LENGTH MAY VARY WHEN NECESSARY. SIMPLY CHANGE THIS NUMBER TO DESIRED LENGTH.

LADDER CLIP

1/2" BOLT

1/2" INSERT

GALVANIZED 5/8" x 7"LONG STEP BOLTS

COMPLETE WITH LOCKINGNUT, ON 15" CENTERS

CAT. NO.: "PS"

15"

48"typicalspacing

LADDER CLIPSONLY (LADDERBY OTHERS)

CAT. NO.: "LC"

Since 1953


10/12

Cast Aluminum Cable Entrance Covers

Electrical Grounding

Attachment of Grounding System

THE INTERNAL RACEWAY OF SPUN CONCRETE POLES ALLOWS FOR WIRES AND CABLE TO BE RUN INTERNALLY. TO GIVE ANEVEN, SMOOTH TRANSITION WE CAN SUPPLY CAST ALUMINUM CABLE ENTRANCE COVERS WHICH WILL ACCEPT LINES OF 2"DIA. THIS IS VERY POPULAR ON TERMINATION POLES INTO SUBSTATIONS. -SO CLEAN, SO NEAT, SO SIMPLE!!

WHERE ELECTRICAL CONDUCTIVITY IS CONCERNED, A CONCRETE POLE IS IN ESSENCE A STEEL POLE, THUS WE STRONGLYRECOMMEND THAT IT BE GROUNDED. THE LAST LETTER "G" IN THE POLE CATALOGUE NUMBER MEANS THE POLE WILL BESUPPLIED WITH A MEANS TO ELECTRICALLY GROUND IT. DETAILED BELOW ARE TWO METHODS BOTH APPROVED BY THE(CSA) CANADIAN STANDARDS ASSOCIATION.

17"

STANDARD GROUND IN HANDHOLE EXTERNAL GROUND

EXTERNAL

POLE INSERT

SECTIONAL VIEW

CLIP

INTERNAL

GRADE

GROUND WIRE(BY OTHERS)

GROUND WIRE(BY OTHERS)

GROUNDWIRE CLIP

SPACED APPROX.EVERY 10'

ENSURE POLEIS ELECTRICALLY

GROUNDED AS WELL

CAT. NO.: "SBC-25"

CAT. NO.: "IGS" CAT. NO.: "EGS"

#6 COPPERGROUND WIRE

#6 COPPERGROUND WIRE

GROUND LUG TOACCEPT 1/2"GROUND STUD BYOTHERS

OPTIONAL BRASSSPLIT BOLTCONNECTOR (SCREWSINTO 1/2" EXTERNALGROUNDING LUG)

COVERPLATE

HANDHOLE BOX

SECURLEY BONDED TO ACONTINUOUS STEEL BAR

SECURLEY BONDED TO ACONTINUOUS STEEL BAR

CABLE ENTRANCECOVERCAT. NO.: "ACE"

CABLEENTRY

SHAPEDAPERTURE

TYPICAL POLE LAYOUT

2" DIA.OPENING

1/4"INSERTS(ENTRANCE COVER

FASTENERS)

OTHER ACCESSORIES SUCH AS CROSS ARMS, INSULATOR BRACKETS OR ARMS ARE AVAILABLE. FOR MORE INFORMATION PLEASE CONTACT YOUR LOCALREPRESENTATIVE OR ONE OF OUR SALES OFFICES.

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Since 1953


12/12

www.kingluminaire.com www.stresscrete.com

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U TA H

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REGINA

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GREENBAY

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MADISON

NEWORLEANS

JACKSON

MIAMI

TAMPA

JACKSONVILLE

HOUSTON

CHARLOTTE

RICHMONDCHARLESTON

DETROIT

FRANKFORT

CLEVELAND

ERIE

BALTIMORE

PITTSBURGH

KNOXVILLE

AUGUSTABURLINGTON

OTTAWA

TORONTO

CONCORD

ROCHESTER

BOSTON

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CHARLESTON

MONTGOMERY

COLUMBUS

MONTREAL

QUBECCITY

DULUTH

CHICAGO

ST.LOUIS

DALLAS

WINDSOR

Burlington

Jefferson

Atchison

Northport

840 Walkers Line, P.O. Box 7Burlington, Ontario L7R 3X9(905) 632-93011-800-268-7809Fax: (905) 632-8116

1153 State Route 46 NorthP.O. Box 266Jefferson, Ohio 440471-800-268-7809Fax: (905) 632-8116

14503 Wallick RoadAtchison, Kansas 66002(913) 255-31121-800-837-1024Fax: (913) 255-3124

9200 Energy LaneNorthport, Alabama 35476-3442(205) 339-07111-800-435-6563Fax: (205) 339-4840

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