towers-140425022025-phpapp02 (1)

72

Transcript of towers-140425022025-phpapp02 (1)

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Classifcationo 

 Towers based

on1)No. oCircuits

a.

Single circuits

towers

b. DC/SC towers

c. DC towersd. MC towers

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2)AOD

a) Susension/Tangent towers !2 

b) S"all angle towers 2 #1$

c) Mediu" angle towers 1$

#%&d) 'arge Angle towers %& #(&

e) Dead end towers (&

)   Transosition towers*+,ar"s)

g)   Secial towers - C MC N0 N0MC

)   ole "ounted ter"ination towers

i)   Mono oles

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SC DC/SC*0/0)

MC*0/0)

N0 *0/0)

A /D*+.2)

3*4) &  *1.%)

0 5*6.1$) '*4.6) %& 

*1.%1)

C7D S*6.6$) M*11.$)

(& 

*%.16+)

0ot ,ar"

8t

0ot

,ar" t

12.24% 12.%$ 12.%

Total

8eigt

Total

eigt

26.%41 %4.+( 26.1

1%2

39

Note: All in

"eters

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'7T TS M/C N0

A A9/AS , & 

0 0S ;   %& 

C CS*4) <*16) (&  *%.%)

D*11)

0ot,ar" 8t 1(.4$ 1=.&4$ 16.+$ 11.6=

Total 8t %%.$ %4.&%$ $1.+ 2=

22& 

39

Note: All in "esters

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N0 MCN0*22&39) MCN0*1%239)

12&" 2$&" %&&"

(&  & %& 7 (&Deg

&  %&  7 (& 

2.2 $.+ %.=%(

1+ 1%.1 12.1$

Special towers

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Mono ole14&"

%& 

7 (& 

0ot ,ar" 8t 1$.4

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>or ri?er crossing susension towers onl@

8eigt*

")

0ase

widt

*0/0) *")

0ot

,ra"*")

t.

*MT)

>ull C 44.2 12.%4 (= %2.$

TrunB C

62.1$ 1&.+ $2.$ 24.=

 C

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%"

("

="

12"

14"

2$"

%&"

Tower etensions:

Eenerall@ etensions are added to te tower at 0otto" section .Cage Ftension is added at cage or dead end towers te etensio

ill be o %" 7 $"

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Nor"al san: %2&" or anter

  %$&" or <ebra and '7Ttowers

  %4&" or Moose and TS

towers   =$&" or C

Actual san

ind san

eigt san:  'et wt. san 7 5igtwt. san

FGui?alent san

Negati?e san

SANS:

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Frection

a) Setting ostubs:

Te"late

B/B & diagonal at Template top

B/B & diagonal at stub top Ram bus shape

Stub cleats wit 07N 2 eac

Ftra cleats to a?oid ailure o

oundation due to tower alling.Treads to bisect

'7A

Te"late eigt at centre oint 7

 Hoining o 2 treads

robe setting

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b) Ater 1+ da@s o curing

0uilt#u "etod:# Tis "etod consist o

erection o towers "e"ber b@ "e"ber. Te +

"ain leg "e"bers o frst section o te tower

are frst erected and gu@ed o. Te cross

braces ten asse"bled. >or asse"bling second

section a ligt gin ole is laced on to o te

corner legs or raising te second section o te

tower. Aterwards te gin ole is sited to to

o second section leg to raise tird section tis

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Section "etod :#

MaHor sections o te tower areasse"bled on te ground and sa"e areerected as units.Fiter "obile crane or gin ole o 1&"long is used.Eround asse"bl@*roto) :#

Tis "etod consist o asse"bling te toweron ground and erecting it as a co"lete unit.Te co"lete tower is asse"bled in line wiseosition to allow ,ar"s to ftted. Ater

asse"bl@ is co"leted tower is icBed uro" ground wit te el o crane andcarried to is location and set on itsoundation.

Tis "etod is not is useul wen te towersare large and ea?@ and te locations are

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8elicoter "etod :#

Jn tis "etod te tower is erected in section.

0otto" section is frst lited on to te stub

and ten te uer section is lited andbolted to frst section and te rocess is

reeated till te tower is erected. So"e ti"es

co"lete asse"bled tower is raised wit teel o elicoter. Tis "etod is adoted

wen aroac is i"ossible.

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oTower arts - 4( Microns

o0olt 7 Nuts # +$ Microns

Eal?aniKation :

MS tower arts to Eal?aniKed tower arts

Eal?aniKation rocedure

1 2 % $+ ( 6 4

1. Decreasing 0at 8ard 8C'2. icBling 8C'

%. 5insing ater+. >luing A""onia and <inc Cloride$. 8ot late(. <inc batc6. D@cro"iKing4. >inising 7 >illing

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Tigtening o07NTe bolts 7 nuts are used to Hoin te tower arts

Te bolts are o 1("" dia"eter and 2&"" dia"eter

Te lengt o bolts are ?arious ro" %$"" to 4&""

"ultile o $""

16.$""/21.$"" dia ole is ro?ided on tower art

or fing bolt 7 nut

Sring wasers # 1( %.$ ""# to tigten te

bolt7nut>lat wasers + $ ( 4 1&2& and 2$"" to fll u

gas between te tower arts

CecB or tigt o 07N using torGue wrenc

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Te treads o bolts roHecting out side sall beunced at % ositions and do al round

welding toensure tat nuts are not loosened in course oti"e

and a?oid tet o angles.

<inc eo@ ainting is alied on welded

ortion toa?oid rusting.

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Tower ?erticalit@ :# 1 in %(&

Slenderness 5atio =  FLecti?e lengt o "e"bers / 5a

  o g@ration

S5 gi?es 5esistance o an@"e"ber to bending

S5 or leg "e"bers # 1$&

Tension "e"bers # %$&

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Erounding :#

ie earting -Tower oot5esistance!1$ o"

C earting # 1$ - %& " o 6/4 or 6/=SE

gal?aniKed steel wire

$&("" at o 1.$" lengt is used 7at

sould be buried at &.(" below teground

le?el.

 Farting ie is o 2$"" dia %&$&"eters

lengt EJ ie wit oles.

Flain ractice o coBe and saltbetoniteowder

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earting is ro?ided or D leg onl@

>or 5ailwa@ crossing double earting

is to be ro?ided.

Nor"all@ eart ie is laced?erticall@ 7 in diIcult laces eart

ie laced in slant osition wit rior

aro?al.

A it o %&&"" dia and %.2" det

is eca?ated to lace eart ies.

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Tower Accessories: #

Danger boards

Nu"ber late

ase late

Anti Cli"bing De?ice

Ste bolts 1(16$ ""

Antierc / 0ird guards or susension towers

8anger rods

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i) NO TOF5 S8A'' 0F F5FCTFD ON >ONDATJON 0F>O5F1& DA;S A>TF5 CONC5FTJNE.

ii) C8FC3 T8F CO55FCTNFSS O> DJAEONA' AND 'F9F' O>T8F ST0 O> T8F >ONDATJON.

iii) TOF5S A5F TO 0F F5FCTFD AS F5 F5FCTJOND5AJNE

i?) ASSFM0'; O> TOF5 A5TS S8A'' 0F MADF AS F5MA53 NM0F5 JSF FNE5A9FD ON T8F TOF5 MFM0F5CO55FSONDJNE TO NM0F5 JN T8F F5FCTJOND5AJNE.

?) SFCJA' CA5F S8A'' 0F TA3FN JN SF'FCTJON O> MA53

NM0F5 >O5 T5ANS9F5SF AND 'ONEJTDJNA' >ACF O>T8F SA5F 0ASF TOF5.

?i) AN; 0C3'JNE DAMAEF TO STFF' MFM0F5 DAMAEF TOEA'9ANJ<JNE S8A'' 0F A9OJDFD

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?ii) NO MFM0F5 S8A'' 0F S0FCTFD TO NDF ST5FSS.

?iii) 5FASON CAN 0F: *i) DF>FCTJ9F >A05JCATJON.

  *ii) DF>FCTJ9F >ONDATJON.

*iii) DF>FCTJ9F F5FCTJON MFT8OD.

?iii) CO''FCT MATF5JA' >5OM STO5F TA'';JNE JT8

0OM.

i) 5F>F5A0'; T5ANSO5T COM'FTF TOF5 O5

COM'FTF SFCTJON.

) T8F TOF5 MFM0F5 AT 'OCATJON S8A'' 0F 3FT ON

E5OND SF5JA''; ACCO5DJNE TO T8F NFFD >O5

>O''OJNE F5FCTJON SFFNCF.

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 TOWER ERECTION

DERRICK 

DERRICK TYING ROPE

20mm POLYPROPYLENE

ROPE

DERRICK 

DERRICK TYING ROPE

20mm POLYPROPYLENE

ROPE

DERRICK 

DERRICK TYING ROPE

20mm POLYPROPYLENE

ROPE

DERRICK 

DERRICK TYING ROPE

20mm POLYPROPYLENE

ROPE

DERRICK 

DERRICK TYING ROPE

20mm POLYPROPYLENE

ROPE

DERRICK 

DERRICK TYING ROPE

20mm POLYPROPYLENE

ROPE

DERRICK 

DERRICK TYING ROPE

20mm POLYPROPYLENE

ROPE

DERRICK 

DERRICK TYING ROPE

20mm POLYPROPYLENE

ROPE

DERRICK 

DERRICK TYING ROPE

20mm POLYPROPYLENE

ROPE

CROW BARS

DERRICK 

DERRICK TYING ROPE

20mm POLYPROPYLENE

ROPE

CROW BARS

DERRICK 

DERRICK TYING ROPE

20mm POLYPROPYLENE

ROPE

CROW BARS

DERRICK 

DERRICK TYING ROPE

20mm POLYPROPYLENE

ROPE

CROW BARS

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i) 8J'F 'OADJNE AND N'OADJNE T8F TOF5 A5TS

CA5F S8O'D 0F TA3FN >O5 STAC3JNE

S;STFMATJCA'';.

ii) 8AND'F T8F TOF5 A5TS CA5F>'';. 8J'F

8AND'JNE T8FM FA5 SJTA0'F E'O9FS.

iii) FSTA0'JS8 C'FA5 SJENA'/COMMNJCATJON 0FTFFN

T8F F5SONS O53JNE ON T8F TO AND T8F

FO'F S';JNE TOF5 A5TS ATC8JNE E;S

''JNE FTC SFCJA' CA5F S8A'' 0F TA3FN >O5 5.C.

TOF5.

i?) A'' 'J>TJNE TOO'S AND TAC3'FS S8O'D 0F 'OAD

TFSTFD AS F5 STANDA5D.

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?i) FNS5F T8F DF55JC3 SFD 0F>O5F TOF5

F5FCTJON 8AS 0FFN C8FC3FD >O5 ADFATF

ST5FNET8 / SJ<F.

?ii) 3FF ATC8 ON A'' E;S SFD D5JNE F5FCTJON

AN; S'JAEF/>AJ'5F J> T8F E; CAN CASF

ACCJDFNT.

?iii) O';5O;'FNF 5OF >5OM 2&MM TO 2$MM SJ<F

S8O'D 0F SFD >O5 E;JNE 7 'J>TJNE.

i) A>TF5 $ OF5ATJONS C8FC3 T8F CONDJTJON O> T8F5OF. J> O5N OT T8FN 5FFCT.

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i) A'' TOF5 MFM0F5S TO 0F >JTTFD JT8 A5O5JATFSJ<F O> NTS 7 0O'TS O> T8F SFCTJON F5FCTFD 0F>O5FT8F F5FCTJON JS TA3FN >O5 T8F NF,T SFCTJON.

ii) A9OJD A'' TOF5 F5FCTJON JN 5AJN; DA;.

iii) 8FA9J'; C'OD; DA;S A9OJD A'' T;F TOF5 F5FCTJON.STO TOF5 F5FCTJON O> 5.C.TOF5.

i?) JN CASF O> 8FA9; JND O5 A5OAC8JNE STO5M STOA'' TOF5 F5FCTJON. F9F5; ONF S8O'D 0F AA; >5OMT8F TOF5.

?) F 'J3F 8F'MFT SA>FT; 0F'T O> 5OF5 A'JT; JSSFD.

?i) >O5 C'JM0JNE TOF5 SF SA>FT; 0F'T 8JC8 CAN 0F>JTTFD TO T8F TOF5.

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Conductor A"s 3g/3M A'$= JN9A5

anter +4= =6+ 6%+ A". Doubleanter

%&6/%.&&

<ebra 6%6 1(21 =%& A". Double<ebra

$+6/%.14

Moose 4+& 1==4 $+6/%.$%

LINE MATERIALS

1.Conductors

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AAAC- 'ess wt. "ore sag 7 "ore current carr@ing caac

ACS5# More wt. less sag 7 less current carr@ing caacit

J. Total No. o wires P %N*N1)1 Q ere NP No. o la@e

'a@er No. owires

Total

Centre 1 1

1st ( 6

2nd  12 1=

%rd 14 %6

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JJ. 'a@ 5atio P 'a@/OD Q ere OD P Outer

dia"eterP*2N1)dQ

were dP Dia o single strand

14 wires 1& - 12

12 wires 12 #1+

( wires 1% #14

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2.Fart wire: Sielding angle 1& - %&

6/%.(( 6/%.1$

eigt /3M $6$  +24 3g/3M

%. Jnsulators: 6& 3N 12&3N and

1(& 3N9oltag

e

Susensio

n

Angle

1%239 =Nos 1&Nos

22&39 1%Nos 1+Nos

+&&39 2%Nos 2+Nos

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1%2÷√% P 6(.2 39 ≈ 4& 39 ÷ 11 P 4 Nos 1 etra P = Nos

22&÷√% P 126 39 ÷ 11 P 12 Nos 1 etra P 1% Nos

+&&÷√% P 2%&.=$ 39 ÷ 11 P 21 Nos 1 etra P 22 Nos or Say

a) orcelain Jnsulators :# 0all and SocBet

'ong rod

b) S5C Jnsulators :# Silicon 5ubber Co"osite

>5 rod wit seds fber resin lastic rod

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Jnsulator oisting

Susension insulators sall be used uto de?iations o 2degrees on all tangent t@e towers on te line and straininsulators on all angle t@e towers.

>or ensuring insulation co#ordination te susension ortension strings on aroac and ter"inal towers near te

station ends uto a lengt o 1.$ 3" sall be ro?ided witadHustable arcing orns on tower side and fed arcing ornson line side Beeing te arcing ga as "a@ be stiulated b@te Fngineer at site.

Jnsulator strings sall be asse"bled on te ground. Tesesall be cleaned and ea"ined beore oisting. Allaccessories sall be roerl@ ftted.

Tose a?ing glaKing deects eceeding al centi"etersGuare sall not be used.

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>or susension towers 6& 3N insulators are

oisted

wit Aerial rollers. Te Aerial rollers are

liBe single

slee?e ulle@ .0eore oisting o insulators

te M ins

sould be cecBed torougl@ or teir

oening so tat te insulation will not

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+. SS8 or conductor:# A rods 11 - 1+ NosQ were

AP reor"ed Ar"oured 5ods

$. ST8 or conductor (. DS8 or conductor

6. DT8 or conductor 4. SS8 or eart wire

=. ST8 or eart wire

1&. +5 stocB bridge ?ibration da"ers *1.2 - 1.%

11. MS Hoint or conductor

12. MS Hoint or eart wire

1%. 5eair slee?es

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CORRECT METHODSWRONG METHOD

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i) SF'FCT CONTJNOS ST5FTC8 AND STA5TJNE T;F O> TOF5>O5 ST5JNEJNE JT8 ADFATF CA5F.

ii) 5FA5F D5M SC8FD'F >O5 CONDCTO5 JT8 CA5F TO5FDCF ASTAEF.

iii) SF'FCT 5OF5'; T8F 'ACFMFNT SC8FD'F >O5 TFNSJONF5AND ''F5.

i?) SF'FCT T8F 'ACF CA5F>''; >O5 'ACFMFNT O> TFNSJONF5

AND ''F5 TA3JNE SJTF CONDJTJON JNTO CONSJDF5ATJON.?) C8FC3 CO55FCTNFSS O> F5FCTFD TOF5 AS F5 D5AJNE

AND SFCJ>JCATJON >O5 A'' TOF5S.

?i) C8FC3 COM'FTJON O> FA5T8JNE AND 5FCO5D TOF5>OOTJNE 5FSJSTANCF O> FAC8 'OCATJON.

?ii) A'' T5FFS FN5OTF T8F 'JNF S8O'D 0F C'FA5FD AND

5FMO9FD >5OM T8F T5A9F''JNE AT8 O> CONDCTO5.

?iii) CF5TJ>; A>TF5 9F5J>JCATJON OJNT';.

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ST5JNEJNEa)a?ing out o conductor

b)5oug sag

c)>inal tension / stringing

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MFT8OD

S'AC3 O5 'A; OT MFT8OD.

A;JNE 0; TFNSJONF5 ''F5.

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T7 reGuired :#

Tractor/TensionerTurn table *$T or 1&T)Conductor socBsAuto"atic co"e along cla" or conductor and eart2&"" and 2$"" D sacBlesooden acBs

Eround rollersAerial rollersCrowbars8acBsaw bladeCutting liers

Screw dri?erSanners

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1. Eenerall@ dru" lengts are

anter 23M<ebra 13M

Moose 13M

Fart wire 23M

2. lace te conductor dru" on T5N TA0'F 7 unwind it.

%. ull te end o conductor o?er ground rollers and

assing

troug Aerial rollers at susension towers reac

te net cut oint tower using tractor/ tensioner.+. MaBe u te end o conductor to te cut oint tower w

$. >ollow te sa"e rocedure or balanceconductors and eart wire

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5oug sag

T7 reGuired:#

5oug sag leadsSteel roes 1&"" 12"" 1$"" and 1(""Co"e along cla" *6 bolts)Slings *2&"")

+ Sea?e ulle@2 Sea?e ulle@Single Sea?e ulle@Manila roes 12"" 1("" 14"" and 2&""Single and double end socBsTurn bucBle

D saBles 2& ""Dead "an 1to 1.2 "

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(. 0@ connecting te oter end to 'FT; do te roug sag b

  ulling wit tractor/tensioner and see tat conductors

are lited Jn all sans b@ and eigt.

6. Co""on roble" is 0A5D CAEJNE

'FT; "ade wit steel roe o 12"" o 2&&" and

+&&" lengts wit our sea?e ulle@s on eiterend.

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>inal tension /Stringing

T7 reGuired:#

1. 'eg winc

2. Sag boards

%. 1&& MT Hoint co"ressor wit die sets

suitable or anter <ebra Moose and

eart wire.

+. Fart wire at cla"s

$. D sacBles 1(""/2$""

(. 0inoculars

6. Tractor / Tension uller

4 T lli d ill b $ 4 3M

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4. Tra?elling seed will be $ - 4 3M er our.

=. i seed is low causes swinging o tra?eler and insulator

ardware and iger seed cause da"age.1&. Tension load will be around 2&&& - 2$&&3gs11. >or %rd crossar" stringing tension will be$&& 3gs12. >or +&& 39 ilot wire and tensioner is used. >irst

ilot wire will be assed troug te entire reac wit

Tractor. Conductor is winded on Tensioner. ilot wire is

Bnotted to conductor. Te oter end o ilot wire is

connected to uller.slowl@ uller load alied and

tensioner is releasing te conductor witout an@

roble" and "aBe u at tis wit ST8. Once a?ing is

co"leted again load Tensioner till sag oint and

gu@ed. Ten b@ 'et@ and Tractor "aBe "arBing

and cater te end.

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1%. Measure"ent o sag wit eGual suorts use sag

boards

between te two towers o sag san1+. Measure"ent o sag were suorts are at diLerent eigt

or single sans. se D@na"o "eter or tension readings

1$. Sagging section lengt sould not eceed $3M or 1$ sans

1(. @sical "easure"ent o ground clearance on roads

and

i"ortant laces.

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A   A

1.0M LONG ISMB200

BACK !ILLED EARTH

STEEL ROPE O! 20MM DIA

DETAIL " #A$

100MM

%00MM

1100MM

10MM

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BACK !ILLED EARTH

1.0M LONG ISMB200

STEEL ROPE O! 20MM DIA

DETAIL " #A$

100MM

%00MM

1100MM

10MM

A   A

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 TOOLS & PLANT RE'(IRED PER COND(CTOR

1. 20mm )*a +*r, Ro, S*/ 0m ,/34- 1 No.

2. 20mm 5D5 S4a6, - 2 No%. Com, ao/ Cam 7Bo3,) Ty,8 - 1 No.. 20mm S*/ 10m ,/34 - 1 No.. D,a)m,/ +oo) 71000mm-1200mm o/8

- 1 No.DETAIL " #B$

2.00M LONG ISMB 200

BACK !ILLED EARTH

STEEL ROPE O! 20MM DIA

100MM

%00MM

1900MM

20MM

0m Aro:.E:;a<a3,) *3 or A/;4or*/ o Co/)>;3or

 TENSION TOWERS(SPENSION TOWER S(SPENSION TOWER

B

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DETAIL " #C$

2.00M LONG ISMB 200

BACK !ILLED EARTH

STEEL ROPE O! 20MM DIA

100MM

%00MM

2100MM

20MM

C

NOTE? S*/ *@, = 20mm. D,,/)*/ >o/ 34, T,/*o/ oa) ro, *@, 4o>) , ,,;3,)+4*;4 * ),,/),/3 o/ /o o ;o/)>;3or3y, a/) 34, 3,/*o/ a*,) )>r*/ 34,a*/. Arra/,m,/3 4o>) , ;aa,o 1. 3*m, o 34, 3o3a 3,/*o/ oa).

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IMPROPER

G(YINGARRANGEMENT

RAIL PIECE

BACK !ILLEDEARTH

STEEL ROPE

RAIL PIECE

BACK !ILLEDEARTH

HOOK HOOK 

STEEL ROPE

HOOK 

PROPER

G(YINGARRANGEMENT

PROPER

G(YINGARRANGEMENT

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A3,r 3r*/*/ ,/>r, 34, oo+*/

A/y ),ar3>r, rom 34, ;orr,;3 a */a/y a/ )o, /o3 ,:;,,) ,r;,/3.

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a ma:*m>m o 10mm.

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i) AN; 8JST'F O5 COMMNJCATJON >5OM T8F F5SON AT 0AC3 STA;ST5JNEJNE S8O'D 0F STOFD.

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i) MFAS5F T8F F,ACT MF5 'FNET8 5FJ5FD >O5

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Statutor@ Jnsection

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Statutor@ Jnsectionoints:

S. No.

'ocation No.

T@e o tower

Ci"ne@

Coing

Missing bolt 7

nuts

85 weld

Jnsulators

Arcing orns

 u"er bolt 7

nuts

 u"ers

9ibration

Conductor

Fart wire

Fart wire

bonds

Nu"ber lates

Danger boardsase lates

Ste bolt 7

nuts

rotection wall

Eround

clearance

Tree clearance

Oter re"arBs

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