standard definitions of civil

7/29/2019 Standard Definitions of Civil

1/88

T h i s d o c u m e n t i s t h e p r o p e r t y o f

Ra il t r ack PLC . I t shal l no t be

r e p r o d u c ed i n w h o l e o r i n par t w i t h o u t

t h e w r i t t e n p e r m i ss io n o f t h e

C on tr o l ler , Safety Standards,

Ra il t r ack PLC .

Publ ished b y

Sa fe ty & Standards D i rec to ra te ,

Ra il t r ack PLC ,

F loo r 2 , F it z ro y H ou se ,

355 Eus ton Road ,L o nd o n N W 1 3A G

C o py r igh t 1 9 9 6 Rai lt r ac k PL C

Appr oved by

Signa tu res Remo ved f ro m Elec t ro n i c Vers ion

K e i t h T o l l ey

N om inated Respons ib le Manager

Aut horised byB r i an A l st o n

C o n t r o l le r , T r ac k a n d St r u c t u r e s St a n d ar d s

Code of Practice

GC/RC5603

Issue 1

Date: November 1996

Standard

Definit ions of Civil

Engineer ing Terms

Synopsis

T h is C od e o f P rac t i ce de fi nes te r m s in

com m on use in c i v il enginee r ing

Rai lway Group Standards and Rai l t rack

L i n e d o c u m e n t s.

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Standard Definit ions of Civil

Engineer ing Terms

R A I L T R A C K 1

Code of Practice

GC/RC5603

Issue 1

D a t e : November 1996

Page 1 o f 86

ContentsSect ion Descr ipt ion Page

Par t AIssu e Reco r d 2

Resp o n sib il i t ies an d d ist r ib u t io n 2

H ealt h an d Safet y Resp o n sib i l i t ies 2

Su p p ly 2

Par t B1 Pu r p o se 3

2 Sco p e 3

3 Pr in c ip les fo r in c lu sio n o f d e fin it io n s 3

4 D efin it io n s 4

Appendices1 Refe r en ces 7 1

2 D iagr am s 7 2

3 C o m m en t s fo r m 8 4

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Par t A

Issue RecordTh is code o f p rac t i ce w i l l be upda ted w hen necessa ry by d i st r i bu t i on

o f ind iv idua l p ages.

A m ended o r add i t i ona l par t s o f r ev i sed pages w i l l be m arked by a

ver t ica l b lack l ine in the ad jacent marg in .

Issue Date Comments

1 N o vem ber 19 9 6 O r igin al d o cu m en t

Responsibilities and DistributionTh is cod e o f p rac t i ce shal l be m ade avai lab le to a ll pe rson ne l w ho

are invo l ved i n c iv i l eng inee r ing wo rk o n Rai lt r ack C on t r o l l ed

In f rast r uc tu r e and i t sha ll be read i n con junc t i o n w i th c i v il

eng ineer ing Rai lway Group Standards and c iv i l eng ineer ing Rai l t rack

L i n e d o c u m e n t s.

Healt h and Safet y Responsibil it iesI n i ssu ing th i s Co de o f P ract i ce , Rai lt r ack PLC m akes no w ar ran t i es ,

exp r ess o r imp l i ed , t ha t com p l i ance w i th a ll o r any Rai lway Gr ou p

Standards o r C od es o f P rac t i ce is su f f ic i en t on i t s ow n to ensu re

saf e sy st e m s o f w o r k o r o p e r a t i o n . Each use r i s rem inded o f i t s

ow n respon s ib i l it i es to ensu re hea l th and safe ty at w o r k and i t s

ind iv idua l dut ies und er heal th and safety leg is lat io n.

SupplyC o n t r o l le d a n d u n c o n t r o l l e d c o p i es o f t h i s C o d e o f Pr a c t ic e m a y b e

ob ta ined f ro m Th e C ata logue Sec re t a ry , Sa fe ty and Standards

D i rec to r ate , Rai l t r ack PLC , F loo r 2 , Fi t z ro y H ou se , 355 Eusto n

R o ad , L o n d o n , N W 1 3 A G .

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Par t B

1 Purp oseTh is code o f p ra c t i ce de f ines te rm s in comm on use in c ivi l eng ineer ing

Ra i lway Group Standards and Ra i l t rack L ine documents .

2 Scop eThe def in i t ions in th is code of pract ice apply to a l l c iv i l engineer ing re la ted

Ra i lwa y Group Standards and Ra i l t rack L ine docum ents . They a lso app ly

to a l l c i v il eng ineer ing w orks be ing ca r r ied ou t on Ra i lt rack con t ro l led

in f ras t ruc tu re .

3 Pr inc ip les fo r

inc lusion of d ef in i t ions: 3 . 1 K e y t o th e o ri gi n o r ow n e r o f d ef in it i on s:

E* Elect r if ica t ion

K * Sign a llin g

M * M ech an ica l / Tra ct ion / Rollin g St ock

RB* Ra ilt r a ck Ru le Book

RT Ra ilt r a ck Gen er a l (CE or igin )

S St r u ct u r es

T T ra ck

T SH B* T ra ck S af et y H a nd bo ok

* N O TE : D e f i n i t io n s w i t h a n o w n e r / o r ig in w i t h * a b o v e a r e q u o t ed w i t h o u t

amendment , even when tha t de f in i t ion does no t mee t the c r i te r ia se t ou t

be low.

3 . 2 . W o r d s t h a t h a v e a R a il t r a ck s p e c if i c m e a n in g h a v e b ee n i n cl u d e d ( e.g .

fou r foo t , accommoda t ion b r idge )

3 . 3 . W o r d s t h a t h a ve a p a r t i cu l ar p e r m a n e n t w a y ( t r a ck ) m e a n in g h a ve b e en

inc luded (e.g. bu l lhead ra i l , swi tch etc. )

3 . 4 . W o r d s t h a t h a ve a p a r t i c u la r s t ru c t u r e s m e a n i n g h a v e b e en i n c lu d e d ( e .g .

br idge st r ike, spandre l)

3 . 5 W o r d s i n c om m o n c iv il e n gi n e er i n g u s e h a v e ge n e r a ll y b e e n e x cl u d e d (e .g .

backf i l l , )

3 . 6 W o r d s w h i c h a r e p r o d u c t , p r o c e ss o r p r o c ed u r e sp e c if i c h a v e b ee n

excluded (e.g. Th erm it , Pandro l)

3 . 7 W o r d s w h i c h h a ve li m i t e d sp e c ia l is t a n d / o r t e ch n i ca l me a n i n g h a v e b e e n

excluded (e.g. 3 point l in ing)

3 . 8 W o r d s o r p h r a se s w h o se m e a n i n g m a y b e d e d u ce d f ro m o t h e r d ef in e d

words have genera l ly been excluded (e.g. nose baseplate, s tock ra i l bo l t )

3 . 9 W o r d s i n t h e d e f in i t io n c ol u mn i n C A PI TA L S a r e w o r d s w h i c h a r e d e f in e d

separa te ly in the document .

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4. Def in i t i ons

O R I G I N

/

O W N E R

SU B JEC T D EFIN I TIO N

RT

TSH B

4 - f o o t 1 . The space be tween the RAILs o f STAN D ARD GAUGE TRACK

2 . The space be tween the RAILs

RT

TSH B

6 - f o o t 1 . A n I N T E R VA L b e t w e e n t w o a d ja c e n t TR A C K s o f a RA I LW A Y a n d w h i c h is

approx ima te ly s ix fee t w ide

2 . Th e sp a c e b e t w e e n o n e LI N E a n d a n o t h e r , w h e r e t h e LI N E s a r e t h e n o r m a l

d is tance apar t

RT

TSH B

10 - foo t 1 . An IN TERVAL be tw een TRACKs wh ich i s s ign i f ican t l y w ide r than a SIX FOO T,

usua l l y be tween tw o pa i r s o f TRACKs

2 . Th e sp a c e b e t w e e n o n e LI N E a n d a n o t h e r , w h e r e a w i d e sp a c e is p r o v id e d b e t w e e n

o n e p a i r o f L IN E s w h e r e t h er e a r e t h r e e o r mo r e L I N E s

S A-t yp e b r idge A s tandard semi th rough type s tee l BRIDGE composed o f I-g irder s and a jo is ts-in-

concre te f loo r ca r ry ing one TRACK (see Append ix 2 D iag ram 10) .

RB ABC L A b b r e vi a t io n o f A U T O M A TI C B A RR I ER C R O SS IN G L O C A L LY M O N I TO R E D

T Abo ve ra i l level (ARL) 1 . D istance above RAIL LEVEL a t r igh t ang les to the p lane o f the RAILs .

2 . The d is tance above the leve l o f the top o f a spec i f ied RAIL

RB

K

Abso lu t e B lock 1 . A s ig n a l li n g sy st e m w h i c h a l lo w s o n ly o n e TRA I N t o b e i n t h e BL O C K S E C TIO N

Sec t ion a t the same t ime

2 . A s yst e m o f c o n t r o ll in g R A IL t r a f f ic , w h e r e ( u n d e r n o r m a l o p e r a t io n s) o n l y o n e

TRAIN is a l lowed in the BLOCK SECTION a t a t ime . Proo f o f a sec t ion CLEAR norm a l ly

invo lves observa t ion o f the T RAIN TAIL LAM P by the signa lman o r by the use o f TRACK

CIRCUITs .

RT Abso lu t e p o ssessio n see POSSESSION

RT Abu t m en t A suppor t o f an ARCH o r BRIDGE e tc . wh ich may ca r ry a ho r izon ta l fo rce as we l l as

we igh t .

RT Access p erm i t A wr i t ten au tho r i t y a l low ing access to be m ade to RAILTRACK CO N TROLLED

IN FRASTRUCTU RE and the cond i t ions under wh ich such access is mad e

RT Acco m mo dat io n b r idge An OVERBRIDGE o r UN D ERBRID GE p rov ided to m a in ta in access be tw een po r t ions o f

land in one own ersh ip severed by the cons t ruc t ion o f a RAILW AY

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RT Acco m m o dat io n

crossing

A p r iva te LEVEL CROSSIN G p rov ided to m a in ta in access be tw een po r t ions o f land in one

ownersh ip seve red by the cons t ruc t ion o f the RAILW AY

(see a lso CROSSIN G, LEVEL CROSSIN G, AU TO M ATIC LEVEL CROSSIN G, OPEN

CROSSIN G)

T Acu t e cro ssin g An assem b ly to pe rm i t the passage o f W H EEL FLAN GEs wh ere the RAILs o f two

TRACKs c ross each o the r a t an acu te ang le (see Append ix 2 D iag ram 3 )

(a lso know n as comm on c rossing )

T Ad ju st m en t sw i t ch A s ca r f j o in t i n st a l le d a t t h e j u n c t io n o f C O N TI N U O U S W E L D E D R A IL a n d JO I N TE D TR A C K a n d / o r u n s t r en g t h e n ed SW I TC H A N D C R O S SI N G U N I Ts t o a cc o mm o d a t e

e x p a n s io n o f t h e n o n -C O N TI N U O U S W E L D E D R A I L TR A C K .

RB AH BC A b b r e vi a t io n o f A U TO M A TI C H A L F BA R RI E R C RO S SI N G

T A lign m en t Long itud ina l d i rec t ion o f a TRACK e i the r des igned o r a s a resu lt o f t ra f f i c e f fec ts

RB Al ive Charged w i th e lec t r i ci t y

T Alu m in o -t h erm ic w eld A bu t t we ld ing p rocess by wh ich tw o RAILs a re jo ined toge the r pe rm anen t ly .

T AM S A b b r e vi a t io n o f A U S TE N I T I C M A N G A N E SE STE E L

T An cho r len gt h A l e n gt h o f C O N TI N U O U S W E L D E D R A IL t h a t i s c li p p e d d o w n d u r i n g st r e ssi n g

opera t ions to ensure tha t no m ovement occu rs a t the f i xed end o f the leng th be ing

stressed

T An gle o f a t t a ck The an g le fo rmed b y the d i rec t ion o f the ve r t i ca l p lane o f a wh ee l re la t i ve to the

R U N N I N G E D G E o f t h e s u p p o r t in g RA I L a n d a t w h i c h t h e W H E E L FLA N G E me e t s t h e

RAIL

RB AO C L A b b r e vi a t io n o f AU T O M A TI C O PE N C R O SSI N G L O C A LL Y M O N I TO R E D

RB AO C R A b b r e vi a t io n of A U TO M A TI C O P E N C R O SSI N G RE M O TE L Y M O N I TO R E D

RT Ap p ro ach t o On t he near s ide o f a spec i f ied loca t ion when look ing in the no rm a l d i rec t ion o f t ra f f i c a lso know n as see In Rear O f

RT Ap p ro ved by Ra i l t r a ck A method , s tandard , sys tem, p roduc t o r d raw ing accep tab le to Ra i l t r ack in the manag ing

of i ts bu siness

T

S

Ap ro n 1 . H o r i z o n t a l p o r t i o n of a C A ST C R O SSI N G w h i c h co n n e c t s t o g et h e r t h e l eg en d

FLAN GEs.

2 . A h a r d st a n d in g a r ea , o f t en o f c on c re t e.

S Arch A beam curved usual ly in a ver t ica l p lane, for carry ing heavy loads, such as BRIDGEs or

long span roo fs ( see Append ix 2 D iag ram 4 ) .

S Arch Ba ck se e E X T R A D O S

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S Arch cla dd ing Sheet ing f i xed to the unders ide o f an a rch to de f lec t wa te r leakage and pe rm i t the a rea

be low to be u sed fo r s to rage o r work ing (a lso know n as a rch l in ing )

S Arch f a ce s e e I N TR A D O S

S Arch l in in g se e A RC H C LA D D I N G

RT Arr iva l l in e TR A C K u p o n w h i c h TR A I N s o r v e h ic le s e n t e r a d e p o t , STA T I O N o r M A R SH A L LI N G

YARD

RB

K

Aspect 1 . The v isua l ind ica t ion o f a colou r l igh t signa l as d isp layed to the d r ive r

2 . A n y v a li d v isu a l i n d i ca t i o n o f a s i gn a l a s d i sp l a y ed t o t h e d r i ve r

S Assessm en t (o f a

st ructure)

The de te rm ina t ion o f a sa fe load -ca r ry ing capac i t y o f a STRU CTU RE tak ing in to accoun t

i ts physica l condi t ion and locat ion.

K AT P A b b r e vi a t io n f o r A U TO M A TI C TR AI N PR O TE C TI O N

T At t a ch m en t w eld A n y co m p o n e n t b r a z e d o r w e ld e d t o a R A I L

T Au st en i t ic m a n ga n ese

steel

A s t e el c o n t a in i n g ma n g a n e se u s ed f o r t h e m a n u f a c t u r e o f SW I TC H E S A N D

CROSSIN GS and wh ich has a g rea te r resistance to wear th an s im i la r com ponen t s m ade

f r o m N O R M A L G R A D E R A IL STE E L

A b b r e vi a t e d t o A M S

T SH B Au t h o r ised w a lk in g

r o u t e

A spec ia l l y des igna ted rou t e (wh ich m ay inc lude m ade-up pa thw ays) fo r the use o f

p e r so n n e l w h e n w a l k i n g t o o r f r o m t h e ir p l a c e o f w o r k w h e n c a r r y i n g ou t R A I LW A Y

du t ies o r go ing to o r f rom the i r book ing -on po in t .

RT Au t o m a t ic ba l la st

c leaner

A n O N - TRA C K M A C H I N E f it t e d w i t h a m e a n s o f se p a r a t i n g f i n e ma t e r i a l f r o m r e u s a b l e

BALLAST, the f ines be ing loaded aw ay to t ip o r d epos i ted a t the L IN ESID E and t he

reusab le BALLAST re tu rned to the T RACK

RT Au t o m a t ic ba r r ier A m oveab le fu ll w id th o r ha l f BARRIER, con t ro l led by the approa ch o f a TRAIN , wh ich

ex tends ac ross the fu l l w id th o f a road a t a LEVEL CROSSIN G

K Au t o m a t ic b ar r ier

crossing, locally

mo n i t o re d (ABC L)

An AU TO M ATIC LEVEL CROSSIN G equ ipped w i th ha l f -BARRIERs and road t ra f f i c l igh t

s igna ls a t w h ich the co r rec t ope ra t ion o f the CROSSIN G equ ipm en t i s m on i to red by the

TRAIN d r iver

K Au t o m a t ic h a l f ba r r ier

crossing (AH BC)

An AU TO M ATIC LEVEL CROSSIN G equ ipp ed w i th h a l f -BARRIERs, road t ra f f i c li gh t

s igna ls and te lephones comm un ica t ing w i th th e superv is ing SIGN AL BOX

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K Ax le co u n t er A me t h o d o f TRA I N D E TE C TI O N . TR A C K mo u n t e d e q u i p me n t c o u n t s t h e n u mb e r o f

ax les en te r ing and leav ing a TRACK sec t ion a t i t s ex t rem i ty . A ca lcu la t ion i s pe r fo rm ed

to de te rmine whe the r the TRACK sec t ion i s OCCUPIED o r CLEAR

RT Ax le lo a d survey

e q u ip me n t

A dev ice m oun ted on a RAIL fo r m easur ing and reco rd ing the g ross tonnage o f t ra f f i c

pass ing over pa r t o f a RAILW AY

T Ba ck cro ssin g Th e A C U T E C R O SSI N G o f t h e d i a mo n d o f a D O U B L E JU N C TI O N w h i c h i s l o ca t e d

f a r t h est f r o m t h e JU N C T I O N SW I T CH e s

T

K

Back d r ive 1 . A se co n d a r y d r iv e fo r SW I T C H e s w h ic h is d er iv ed f r o m e i t h er t h e SW I T CH T O E

d r ive , o r f rom in te rconnec ted hyd rau l i c d r i ves, to fac i li t a te the op era t ion o f long SW I TC H e s

2 . A n a d d i t io n a l d r iv e c o n n e ct e d t o t h e S W I TC H R A IL s o f a se t o f PO I N TS a t a

p o s it i o n c lo se r t o t h e C R O S SI N G t h a n t o t h e S W I TC H t i p s

(a lso known as supp lemen ta ry d r ive )

T Ba ck edge The ou ts ide face o f the head o f a RAIL wh en ins ta l led in TRACK. The non RUN N IN G

E D G E s i d e o f t h e R A IL H E A D ( s e e A p p e n d i x 2 D i a gr a m 1 )

(a lso k nown as ou ts ide edge o r f ie ld face )

T Ba ck edge co rn er Th e c u r ve d p o r t i o n o f t h e RA I L H E A D b e t w e e n t h e RU N N I N G SU R FA C E a n d t h e B A C K E D G E ( s ee A p p e n d i x 2 D i a gr a m 1 )

T B ack ra i ls 1 A d d i t io n a l l en g t h s o f R A IL i n a SW I TC H D I A M O N D t o t r a n sf e r t h e r m a l ly i n d u c ed

l o a d s b e t w e e n W I N G R A IL s a n d S W I TC H R A IL s

2 The ma ch ined RAILs a t tached to ve ry f la t ang led ACU TE CROSSIN Gs

T Ba ck -h o le d r i l led A RAIL w i th on ly the FISH BOLT H OLE(s ) fu r thest f rom the RAIL -end(s ) d r i ll ed

T Ba ck -h o le f ish ed A RAIL JOIN T in w h ich the FISH PLATEs a re c lam ped t o the RAILs by m eans o f bo l t s

t h r o u g h t h e F IS H B O L T H O L E s f u r t h e st f r o m e a c h R A IL E N D

T Ba in i t i c st eel A s teel used fo r SW ITCH ES AND CROSSIN GS and ro l led RAILs

T Ba l la st Granu la r m a te r ia l o f spec if ied p roper t ies p laced on the FORM ATION to p rov ide ve r t i ca l

and la te ra l suppor t to the SLEEPERs o r beare rs

T B a l last a t t r i t io n The w ear ing down o f BALLAST f rom i t s o r ig ina l s ize and /o r angu la r i t y

S B al la st b o a rd / p la t e A t imber board o r me ta l p la te to re ta in the BALLAST on a BRIDGE and p reven t i t f r om

f a l li n g t h r o u gh ( s ee A p p e n d i x 2 D i a gr a m 6 )

T Ba lla st clea n in g Remova l o f f ine ma te r ia l f r om the BALLAST o f a TRACK

T Ba l la st co n so l ida t io n The p rocess o f reduc ing the a i r space ra t io o f th e BALLAST supp or t ing a TRACK in o rde r

to reduce the se t t lem en t o f the BALLAST und er t ra f f i c and to im prove i t s shear st reng th .

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T

S

S

Ba t t e r 1 . The loca l i sed wear and depression of a RAIL EN D caused by wh ee l im pac ts

2 . The slope o f the face o f a re ta in ing wa l l

3 . T h e sl op e o f a C U T T I N G o r a n E M B A N K M E N T

RT Ba y l in e A d e a d - e n d TR A C K , a t a t h r o u g h STA T I O N w h i c h h a s a P LA TFO R M p r o v id e d a t o n e o r

bo th s ides and is f i t t ed w i th a BU FFER STO P

RT Ba y p la t f o rm A PLATFORM a t a th rou gh STATIO N tha t b o rde rs one o r bo th s ides o f a BAY LIN E.

T B ea rer see CON CRETE BEARER, TIM BER

S

M

Bear ing 1 . B r i d ge : Th e p o i n t a t w h i ch a g ir d e r o r b e a m i s su p p o r t e d ( se e A p p e n d i x 2 D i a gr a m

6 )

2 . W h e e l: a su p p o r t a n d l o c a t in g d e vi ce f or a w h e e l a n d / o r a x le a n d f o r m i n im i si n g

the ef fects of f r ic t ional forces.

T Bed Ba l last : The space be tw een ad jacen t SLEEPERs, T IM BERs o r beare rs

a lso known as CRIB

S Bedst o n e A s tone o r concre te s lab used to suppor t an d sp read the load o f a g i rde r co lum n o r

B E A RI N G

see a lso CILL BEAM

S Berm A st e p i n t h e sl op e o f a C U T T I N G o r E M B A N K M E N T

RT Bet w een t ra in s W o r k o n a R A I LW A Y TR A C K u n d e r t a k e n i n t h e i n t e r v a ls b e t w e e n TR A IN s p a ssi n g a s it e

RT B eyo n d On the fa r s ide o f a spec i f ied loca t ion wh en look ing in the no rm a l d i rec t ion o f t ra f f i c

a l so k n o w n a s I n A d va n c e O f I N A D V A N C E O F

RB

K

Bi -d i rec t iona l l ine 1 . A L IN E o n w h i c h t h e si gn a l li n g a ll o w s f o r TR A IN s r u n n in g i n b o t h d ir e c t io n s

2 . A L IN E o n w h i c h t h e si gn a l li n g p r o v id e s f o r r u n n i n g mo v e me n t s in b o t h d i r e ct i o n s.

T B i t um en sp ray A ca t ion ic b i tum en sp rayed on c lay SU B GRAD Es as a s tab i l is ing m ed ium

T B la ck bo l t s Stee l bo l t s wh ich have been m ade to w ide to le rances and f rom non-h igh tensi le stee ls

T B la n ket A laye r o f n on -cohesive m a te r ia l o f spec i f ied p a r t i c le size d is t r ibu t ion p laced ove r a c lay

o r s il t y clay SU B GRADE to m in imise the upw ard m ig ra t ion th rough the BALLAST o f c lay

or s i l t par t ic les

T B lem ished ra i l Ra i l ro l led to a reduced s tandard o f qua l i t y f rom tha t no rma l ly requ i red bu t o the rw ise

su i tab le for use

T B lo ck Cast ir on spac ing o r st reng then ing p ieces in SW ITCH and CRO SSIN G work ( see A p p e n d ix 2 D i a gr a m 3 )

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RB

K

Block Ind ica to r 1 . A n i n st r u m e n t w h i c h in d i c a t es t h e st a t e o f t h e LI N E b e t w e e n a d j a ce n t SI G N A L

BOX es (ABSOLU TE BLOCK S igna l l ing )

2 . Th e p a r t o f t h e B lo c k I n st r u m e n t t h a t p r o v id e s t h e si gn a l ma n w i t h a c on t i n u a l vi su a l

ind ica t ion of the s ta te o f the LIN E be tween ad jacen t S IGN AL BOX es.

T B lo ck Jo in t see IN SULATED RAIL JOIN T

RB / K B lo ck Sect io n Th e s ec t io n o f L IN E b e t w e e n t h e S EC TI O N S IG N A L o f o n e SI G N A L B O X a n d t h e

H O M E SI G N A L o f t h e n e x t SI GN A L BO X a h e a d

RT Blo cked l in e A L IN E o r a po r t ion o f a L INE c losed to the p assage o f TRAIN s

RT Blo cked t o elect r ic

t r a in s

A L IN E o r L IN Es o f an e lec t r i c RAILW AY wh ich i s/a re n o t ava i lab le fo r use by e lec t r i ca l ly

p o w e r e d TR A I N s .

E/K Bo n d A connec to r used to p rov ide e lec t r i ca l con t inu i t y be tween two o r more componen ts

T B o n d w i re h o le H o le in the W EB o f a RAIL fo r the connec t ion o f e lec t r i ca l bond ing w i res o r cab les

T Bo ra t e ro d

preservat ion

Th e p r o l o n ga t i o n o f t h e li f e of S O FTW O O D S LE E PE R s, T IM B E Rs a n d L O N G I TU D I N A L

TIM BERs by the inse r t ion o f a num ber o f rods of sod ium oc tabora te in to the t im ber

T Bo t t o m ba l la st The BALLAST be low the unders ide o f the SLEEPERs, T IM BERs o r Beare rs o f a T RACK

T Bo x Sect io n The p a r t o f a CAST CROSSIN G w h ich l ies be tw een the chan ges o f sect ion and w h ich

does not conta in an ord inary RAIL cross-sect ion

T B o x in g- in The p lac ing o f BALLAST be tween SLEEPERs usua l l y up t o the leve l o f the top o f the

SLEEPERs.

T Bo x in g- in ba l la st The BALLAST be tw een the SLEEPERs, T IM BERs or Beare rs o f a TRACK

RB Bra keva n Any RAIL veh ic le w i th a b rake compar tmen t

RB

K

K

Brak ing d is tance 1 . Th e d i st a n c e a TR A IN n e e d s i n w h i ch t o s t o p o r r e d u ce sp e e d t o a s p e ci f ie d l o w e r

speed , f rom t rave l ling a t a g iven speed

2 . E m e r ge n c y: Th e d i st a n c e in w h i c h a TR A I N i s c a p a b l e o f st o p p i n g in a n e m e r g en c y.

D ependen t up on TRAIN speed , TRAIN type , b rak ing charac te r is t i cs , TRAIN we igh t

a n d / o r G R A D I E N T

3 . Se r vi ce : Th e d i st a n c e in w h i ch a T R A IN i s c a p a b l e o f st o p p i n g , f r o m a g i ve n s p e ed ,

a t such a dece le ra t ion fo r a p assenger TRAIN tha t the pa ssengers do no t su f fe r

d iscom fo r t o r a la rm , o r a t an equ iva len t dece le ra t ion in the case o f non -passenger

TR A IN s .

RT Bra nch l in e TR A C K t h a t se r ve s a s a f e e d e r t o M A I N o r S EC O N D A R Y LI N E ( s)

T

T

Bra n d ma rk 1 . Ra i l: de ta i l s o f the RAIL m anu fa c tu re embossed on to the W EB o f a RAIL

2 . SLEEPER: de ta i l s o f the t ype and m anu fa c tu re r cast on to a CON CRETE SLEEPER

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T Break in g o u t D etachm ent o f p ieces o f the RAIL head

S Br idge A STRUCTURE o f one o r more spans o f 1 .8m in leng th o r longer whose p r ime pu rpose

is to ca r ry t ra f f i c ove r an obs t ruc t ion o r gap

T B r idge ch a i r A cast o r fab r ica ted m eta l CH AIR, o f sm a l le r base a rea than a com m on CH AIR, used to

su p p o r t B U L L H E A D R A IL s o n L O N G I TU D I N A L T I M B E R s a n d i n r e s t r ic t e d sp a c e s in

SW I TC H a n d C R O SS IN G l a yo u t s

S B r idge ga u ge An imp lemen t fo r se t t ing o r check ing the c lea rances be tween an OVERBRIDGE and a

TRACK

S Br idge st r ik e An inc ident in which a road vehic le or i ts load (or a vessel in navigable waters) co l l ides

w i t h a B R I D G E

T Br i t t le f ra ct u re A m ode o f f rac tu re cau sed by a loss o f duc t i l i t y and charac te r ised by a sudden b reak

T Bro ken ra i l A RAIL wh ich be fo re rem ova l f rom TRACK h as a f rac tu re th rough the fu l l cross-sec t ion

o r a p iece b roken ou t o f i t w h ich renders i t unse rviceab le

T Bru isin g Loca l dam age to any su r face o f the RAIL f rom a cc iden ta l im pac t f rom va r ious causes

T Bu ck le A t h e rm a l ly i n d u c ed TR A CK M I SA L IG N M E N T

RT B u f fer st o p An assem b ly p rov ided a t the end o f a leng th o f TRACK to l imi t t he t rave l o f RAIL veh icles

see a lso STO P BLOCK

T Bu il t up a n d t im bered

la yo u t

A l a yo u t o f S W I TC H E S A N D C R O SS IN G S b u il t u p b y t h e m a n u f a c t u r e r o n h i s p r e m i se s

and fu l l y t imbered p r io r to d isman t l ing and load ing

T B u il t -u p cro ssin g see FABRICATED CROSSIN G

T Bu l lh ea d An obso lescen t RAIL SECTION wh ich has a head and foo t o f s im i la r shap e

RT B u rro w in g ju n ct io n A SW ITCH and CRO SSIN G layou t wh ich inco rpo ra tes a fac il i t y fo r one o r m ore d ive rg ing

L INEs to be ca r r ied under t he p r inc ipa l rou te to avo id con f l ic t ing movem ents

S Bu t t ress A concre te o r ma sonry th icken ing p ie r a t r igh t ang les to a w a l l bu i lt t o he lp the w a l l to

res is t ea r th th rus t o r w a te r p ressu re o r ARCH th rus t .

S C -t yp e b r idge A s tandard semi th rough type s tee l BRIDGE composed o f th ree Igirders w i th jo is ts-in-

concre te f loo r ca r ry ing two TRACK s. ( see Append ix 2 D iag ram 8 ) .

SK C a b le a vo id in g t o o l An ins t rum en t u t i l ised to de tec t the p resence o f a b u r ied SERVICE

T C a nt Th e a m o u n t b y w h i c h o n e R U N N I N G R A I L o f a c u r v ed TR A C K i s r a is ed a b o v e t h e o t h e r

RUN N IN G RAIL . (a lso known as CROSS LEVEL)

T C an t def ic ien cy A des ign l im i t ing va lue by wh ich CAN T m ay be pe rm i t ted to be less than t he

E Q U I LI B RI U M C A N T r e q u i r ed f o r a c t u a l t r a f fi c

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T C a nt def icien cy

gradient

The ra te a t w h ich CAN T D EFICIENCY changes in a spec if ied leng th

T C a n t gra d ien t The ra t e a t w h ich CAN T changes in a spec i f ied leng th

T C a n t l im i t in g va lu es M i n im u m a n d m a x i mu m C A N Ts f o r sp e c if i c c o n d it i o n s

T C a nt m a rk A v isua l ind ica t ion on the TRACK o f the CAN T ap p l ied o r to be app l ied

RT C a rr iage sid in g SID IN G fo r the s to rage and / o r m a in tenance o f p assenger ca r ry ing veh icles

S C a rr ier d ra in An im perv ious D RAIN d es igned to ca r ry wa te r f rom p lace to p lace . i t is no t designed to co l lec t wa te r f rom the su r face o r su r round ing so i l d i rect l y .

T C a st cen t re cro ssin g A CROSSIN G com pr is ing a cen t ra l cas t ing w i th o rd ina ry ro l led RAIL SECTION legs

we lded on to i t

T C a st C ro ssin g A CROSSIN G wh ich i s m ade f rom cas t stee l .

( see a lso CAST CROSSIN G, CAST M ON OBLO C CROSSIN G)

T Ca st m ono b lo c cro ssin g A CROSSIN G cas t as one p iece .

T Ca st Vee A C A S T C R O SSI N G N O S E .

S C a t ch p i t Cham bers bu i lt a t in te rva ls a long a p ipe D RAIN to p rov ide access to the p ipes for

c lean ing and t o t rap s il t washed in to the D RAIN

RB

T

K

Catch Po in t 1 . PO I N TS p r o vi d ed f o r d e r a il in g a v eh i c le ( s) r u n n i n g b a c k o n a G R A D I E N T i n t h e

W R O N G D I R E C TI O N . Th e se PO I N TS m a y b e u n w o r k e d i f TR AI N s n o r m a l ly p a ss o v er

the POIN TS in one d i rec t ion on ly

2 . A t r a i la b l e sp r i n g SW I TC H i n st a l le d t o d e r a i l v eh i cl e s i n t h e e ve n t o f t h e ir r u n n i n g

a w a y in t h e W R O N G D I R EC T I O N

3 . PO I N TS p r o vi d ed f o r d er a i li n g v eh i cl es r u n n i n g b a c k o n a r isi n g G R A D I E N T. Th e

POIN TS m ay on ly be unwork ed i f t r a f f i c is in one d i rec t ion on ly.

RT C at t le creep An U N D ERBRID GE const ruc ted to p rov ide a fac i li t y fo r ca t t le and o the r an im a ls to c ross

t h e R A IL W A Y

K C a t t le Gu a rd A dev ice p rov ided ad jacen t to the ca r r iageway a t a LEVEL CROSSIN G to de te r an im a ls

f rom s t ray ing and pedes t r ians f rom t respassing on to the RAILW AY. Th is may on ly be

requ i red on one s ide o f the ca r r iageway .

a lso k now n a s Ca t t le -cum - t respass guard o r Trespass guard TRESPASS GU ARD

T C en t re bo u n d A SLEEPER, TIM BER o r beare r w h ich i s suppor ted by BALLAST a t o r n ear i t s mid p o in t

on ly

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T C en t re l in e design A SW ITCH and CROSSIN G des ign tha t i s const ruc ted abou t the long itud ina l cen t re l ine

o f e a ch R U N N I N G R A IL a n d t h e I N T E R SE C TI O N PO I N Ts o f t h o se l in e s

T C en t re l in e

measurement

A m ethod o f m easur ing the ang le o f a CROSSIN G .

RT C en t re t h ro w The ho r izon ta l d isp lacem ent o f a veh ic le a t the m id po in t o f the w hee lbase o r bog ie

cen t res when on cu rved TRACK

T

TSH B

Cess 1 . The space be tween the lower edge o f the BALLAST SH OU LDER and e ithe r the toe

o f a C U TT I N G sl o p e , t o p o f a n E M B A N K M E N T s lo p e o r t h e e d g e o f u n e x ca v a t ed

g round w here the TRACK is a t na tu ra l g round leve l.

2 . The space a longside the RAILW AY L IN E(s)

S C ess d ra in A D R A IN l a id i n t h e C E SS o f a R A IL W A Y

S C ess h ea ve The upw ard D EFORM ATION o f a CESS caused by a st reng th fa i lu re o f the subgrade o f

a TRACK a nd i t s subsequen t d isp lacement

T C ha i r A c a st o r f a b r i c a t ed m e t a l su p p o r t f o r a B U L L H E A D R A IL

T C h a i r p a d Resi l ien t m a te r ia l f i t t ed be tween a CH AIR and the supp or t ing SLEEPER o r T IM BER

T C h a i r screw Coach screw u sed to fasten CH AIRs or BASEPLATEs to the supp or t ing SLEEPERs,T I M B E Rs o r b e a r e r s

T Ch a m fered sw i t ch A S W I TC H i n w h i c h t h e a d j a ce n t s id e s of t h e h e a d s o f t h e SW I TC H R A IL a n d S TO C K

RAIL a re mach ine p laned to a ma tch ing ang led cu t

T Ch a n ge o f sect io n The p os it ion on a CAST CROSSIN G wh ere the ra i l p ro f i le of the LEG EN D S t rans it ions

t o t h e B O X SE C TI O N o f t h e ma i n p o r t io n o f t h e c a st i n g

S C h a n nel d ra in A D R AI N f o rm e d f r om U - shap ed p r e fo rm ed o r cas t in -s itu un i t s

T C heck ba sep la t e A cast o r ro l led m e ta l BASEPLATE wh ich ca r r ies bo th a f la tbo t tom RUN N IN G RAIL and

a f l a t b o t t om C H E C K R A IL

T C h eck cha i r A c a st o r f a b r i c a t ed m e t a l C H A I R w h i c h c a r r ie s b o t h a b u l l h e a d R U N N I N G R A I L a n d a

b u l lh e a d C H E C K R A I L

T C heck ra i l Ra i l o r spec ia l sec t ion p rov ided a longside a RU N N IN G RAIL , a t a spec if ied d im ens ion

inside gauge to p rov ide a FLAN GEW AY, to g ive gu idance to wh ee lse ts by rest r i c t ing

l a t e r a l m o v em e n t o f t h e w h e e l s ( se e A p p e n d i x 2 D i a gr a m 3 )

see a lso RAISED CH ECK RAIL , FLAN GEW AY

T C h eck ra i l lub r ica t o r A RAIL LUBRICATO R designed to p lace lub r ican t on the back o f the W H EEL FLAN GEs

o f veh ic les to reduce the wear o f CH ECK RAILs and W IN G RAILs

T C h ip p in gs C r u sh e d s t on e b e t w e e n 1 0 m m a n d 2 0 m m i n si z e a n d o f a n g u l a r sh a p e u s e d t o f il l vo i d s

below SLEEPERs, TIM BERs or bear ers to restore the level o f the TRAC K

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T D efect ive w eld A w e ld be tween abu t t ing RAILs wh ich con ta ins a de fec t w h ich reduces the st reng th o f

the w e ld o r resu lt s in a w e ld o f unsa t isfac to ry geomet ry

T D ef o rm a t io n M echan ica l d is to r t ion o f a RAIL , o f the TRACK o r o f ea r thw orks

RT D ep a r t u re l ine TR A C K u p o n w h i c h TR A I N s o r v e h i cl e s l ea v e a d e p o t , STA T I O N o r M A R SH A L LI N G

YARD

T D ep t h o f cu t The ve r t i ca l d im ens ion f rom the und ers ide o f a SLEEPER, TIM BER o r beare r to the

b o t t o m o f a B A LL A ST e x c a va t i o n or FO R M A TI O N W O R K

K D era i ler A sa fe ty dev ice a t tached to a RAIL, tha t w i l l, when op era ted . , cause a de ra i lm en t o f a veh ic le in mak ing an unau tho r ised movement .

T D esign ed t a m p ing a n d

l in ing

TA M PI N G A N D L IN I N G w o r k u n d e r t a k e n t o t h e r e q u ir e me n t s o f a d e si gn e d l ev e l a n d

A LI G N M E N T s ch e m e .

S D et a i led ex a m in a t io n A tho rough examina t ion o f the cond i t ion o f a l l pa r ts o f a STRUCTURE inc lud ing the

repor t ing o f the same

RB D et ect io n The p roo f tha t t he POIN TS a re co r rect l y locked in the N ORM AL o r REVERSE pos it ion .

D ETECTION m us t be ach ieved be fo re the p ro t ec t ing signa l w i l l c lea r

see a lso TRAIN DETECTION

RB D et o n a t o r A sm a l l d isk -shap ed w arn ing dev ice, designed to be p laced on the RAIL H EAD fo r

PROT ECTION and em ergency pu rp oses , wh ich exp lodes wh en a TRAIN passes ove r

see a lso RAILW AY FOG SIGN AL

N O TE : A l t h ou g h R A IL W A Y p e r so n n e l h a ve a l w a y s u s ed t h e t e r m D E TO N A TO R ( a n d

th is i s re f lected in t he Ra i l t rack Ru le Book d e f in i t ion ab ove), the co r rec t te rm to use is

RAILW AY FOG SIGN AL . The co r rect de f in i t ion o f a D ETON ATO R is an exp losive

dev ice tha t i s des igned to in i t ia te an exp los ion o f a quan t i t y o f an exp losive subs tance ,

w h i c h t h e R A IL W A Y d e f in i t io n o f a D E TO N A TO R a b o v e d o e s n o t m e e t .

RT D et o n a t o r p la cer A rem ote ly con t ro l led device fo r p lac ing DET ON ATO Rs on a RAIL

RT D ia m o n d cro ssing An assem b ly o f two ACU TE CROSSINGs, two O BTU SE CROSSIN Gs, CLOSURE RAILs,

RAIL FASTEN IN Gs and beare rs wh ich pe rm i ts one TRACK to c ross ano the r T RACK a t

t h e s a me l e ve l ( se e A p p e n d i x 2 D i a gr a m 3 )

K D i f f eren t ia l Sp eed

Restr ict ion

A speed res t r i c t ion h av ing two va lues, each o f w h ich i s app l i cab le to d i f fe ren t t ypes o f

TRAIN

T D ip p ed jo in t A RUN N IN G RAIL JOIN T de fo rm ed ver t i ca l ly by t ra f f i c e f fects

T D irect f a st en in g RAIL FASTEN IN G SYSTEM wh ere the RAIL is fastened d i rec t l y to i t s suppor t ing

SLEEPER, TIM BER, beare r o r BRID GE deck w i thou t a BASEPLATE o r CH AIR

RT D o ub le en ded sid in g se e T H R O U G H SI D I N G

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RT D o u b le ju nct io n A SW I T CH a n d C RO S SI N G l a y ou t c om p r i si n g t w o T U R N O U T s a n d a D I AM O N D

CROSSIN G

T D o u b le p a ra l lel w in g

( D P W )

D oub le PARALLEL W IN G ( ra i l s) i .e . a PARALLEL W IN G RAIL on each side o f a

CROSSIN G VEE (DPW is a su f f i x to the descr ip t ion o f an ACUT E CROSSIN G)

RT

K

Do ub le Sl ip 1 . D I A M O N D C R O SSI N G w i t h f ou r SL IP SW I T CH e s t o p r ov id e t w o a d d it i on a l

d i rect ional fac i l i t ies.

2 . A co m b i n a t io n o f a D I A M O N D C R O S SI N G w i t h f o ur p o in t e n ds w i t h ou t t h e n e ed

fo r separa te CROSSIN Gs (POIN TS) .

RT D o u b le t o ngu e ca t ch

p o i n t

A set o f TRAIN opera ted T RAILIN G SW ITCH es ins ta l led to de ra i l veh ic les in the even t o f

t h e i r u n a u t h o r i se d m o v em e n t

RT D o u b le t o ngue t ra p

p o i n t

A se t o f ope ra ted SW ITCH es ins ta l led to d e f lect veh ic les so as to p ro tec t ad jacen t

TR A C K s in t h e e v e n t o f t h e ir r u n n i n g a w a y i n t h e W R O N G D I R EC TI O N

RT D o u b le t rack R A IL W A Y h a v in g t w o TR A C K s

RT D o u b l ing A d d i n g a TR AC K t o S IN G L E LI N E R A IL W A Y

RT D o w n Di rec t ion away f rom the des igna ted o r ig in fo r a rou te

RT D ra in A covered channe l 45 0 m m wide o r less ca r ry ing a wa te rcourse be low g round level .

T D ressin g o f ra i ls Remova l o f L IPPIN G by m eans o f a po r tab le g r inde r

RB D r iver O n ly (o r D .O .

t ra in )

A TRAIN tha t i s worked on ly by a Dr ive r and does no t have a GU ARD

T D ye p en et ra n t t est in g A non-des t ruc t i ve me thod o f examin ing meta ls fo r su r face b reak ing c racks

T D yn a m ic level L o a d ed l e ve l of a R U N N I N G R A IL

S E-t yp e b r idge A s tandard th rough type s tee l BRIDGE composed o f two Igirders and a jo is ts- in-

concre te f loo r ca r ry ing two TRACK s. ( see Append ix 2 D iag ram 9 ) .

E Ea r t h in g co n n ect io n A conduc to r fo r connec t ing e lec t r i ca l equ ipm en t to the t r ac t ion cu r ren t re tu rn c i r cu i t

T Ela st ic sp ik e See SPIKE FASTEN IN G

T Elbo w Se e K N U C K L E

T Elect r ic a rc w eld W eld be tween ab u t t ing RAILs ma de by an e lect r i c a rc we ld ing p rocess

RT Elect r ic ra i lw a y A RAILW AY upon wh ich veh ic les a re m oved by e lec t r i c it y

RB Elect r i f ied L in e A L IN E wh ich i s e lect r i f i ed e ithe r by 25 ,000 vo l t AC ove rhead l ines o r by 75 0 vo lt D C

C O N D U C TO R R A I L ( s )

RT Elect r i f ied t ra ck A TR A C K o f a n E L EC TR IC R A I LW A Y

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RT Fa cin g (d i rect io n ) The d i rec t ion o f RAIL t ra f f i c ove r POIN TS where a TRAIN m ee ts the TO E o f a SW ITCH

RAIL f i rs t .

RT Facin g cro ssin g A CROSSIN G insta l led so tha t t ra f f i c no rma l ly t rave ls f rom the W IN G RAIL FRON Ts to

t h e C R O SS IN G H E E L

RT Fa cin g cro sso ver A CROSSOVER in wh ich the SW ITCH es a re ins ta l led in the FACIN G d i rec t ion

RB

K

Facing Point Lo ck 1 . E q u i p me n t t h a t p h y si ca l ly lo c k s PO I N TS so t h a t t h ey ca n n o t mo v e

2 . A m e c h a n ic a l m e a n s o f p h y si ca l ly lo c k i n g PO I N TS so t h e y c a n n o t b e mo v e d , m a y b e

p rov ided independen t ly o r inco rpo ra ted in a po in t mach ine .

RB Fa cin g Po in t s POIN TS where two rou t es d ive rge

RT Fa cin g sw i t ch A S W I TC H i n st a l le d w h e r e t r a f f i c t r a v e ls p r e d om i n a n t ly f r o m t h e S W I TC H TO E t o w a r d s

t h e SW I TC H H E EL

S Fa l l Th e G R A D I E N T o f a D R A I N o r o p e n w a t e r c o u r se

T Fa n gb o l t A th rou ghbo l t , for bu l lhead CH AIRs on t im ber SLEEPERs, wh ich has a sp iked wa sher

p la te f i t t ed under the bo l t head to p reven t ro ta t ion o f the nu t

T Fa st en in g see RAIL FASTEN IN G, RAIL FASTEN IN G SYSTEM

S Fa t igu e Fa i lu re , usua l l y o f a m e ta l , caused by the repea ted ac t ion o f a load w h ich wou ld n o t

cause fa i lu re i f ap p l ied fo r a lesser num ber o f t im es.

T Ferru le Tap ered po lyp ropy lene , ny lon o r t im ber s leeve f it t ed in to th e screw h o les o f CH AIRs and

BASEPLATEs to accom m oda te va r ia t ions in ho le d iamete r and t o ac t as a sac r i f ic ia l

in te r face be tween the CH AIR o r BASEPLATE and th e CH AIR SCREW

T Fet t l in g Repa i r s to TRACK wh ich ma y inc lude loca l i sed L IFTIN G and L IN IN G, t igh ten ing RAIL

FASTE N I N G s, B O X I N G - IN a n d r e g u l a t in g B A LL A ST R E G U L A TI N G

T Field f ace See BACK EDGE

T Fil let ra d iu s U pp er and lower f i ll e t rad ius: The pa r t o f the RAIL SECTION be tw een the FISH IN GS U R FA C E S a n d t h e W E B ( se e A p p e n d i x 2 D i a gr a m 1 )

T Fish bo l t Bolt used to secure FISH PLATEs at a RAIL JO IN T

T Fish bo l t h o le D r i l led ho le in the W EB o f a RAIL to accep t a F ISH BOLT

T Fish in g a n gle The ang le be tween t he FISH IN G SURFACES o f a RAIL o r F ISH PLATE and the ho r izon t a l

T Fish in g sur f a ces U pp er and lower f i sh ing su r faces: The pa r ts o f the RAIL c ross-sec t ion th a t m ay be in

con tac t w i th the m a tch ing faces o f a FISH PLATE (see Append ix 2 D iag ram 1 ) .

T Fish p la t e A p la te used to connec t toge the r tw o RAILs a t a RAIL JOIN T

T Fish p la t e h o le H o le in a F ISH PLATE to accep t a F ISH BOLT

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T Fro n t jo in t 1 . Th e jo i n t a t t h e W I N G RA I L FRO N T o f a n A CU T E C R O SSI N G

2 . Th e jo i n t i n t h e S TO C K R A IL in f r o n t o f t h e SW I TC H T O E s

T Fro n t st ret ch er ba r Th e S TRE TC H E R B AR f i t t ed a t t h e T O E s o f a SE T O F S W I TC H E S

S Fro st h ea ve A ve r t i ca l d istu rba nce o f a TRACK caused by the f reez ing o f wa t e r in and the resu l tan t

expans ion o f the SUB GRADE

T Fu l l dep t h sw i t ch A S W I TC H i n w h i c h t h e SW I TC H a n d S TO C K R A I Ls a r e p r o d u ce d f r o m R A I L s o f t h e

same sect ion

T Fu l l screen h eigh t A s igna l w h ich ex tends to the fu l l he igh t o f the ve r t i ca l ca l ib ra t ions o f the ca thode ra y

t u b e d i sp l a y o f a R A IL FL A W D E TE C TO R

T Fu l ly su p p o r t ed jo in t A FISH PLATEd RAIL JOIN T be tw een RUN N IN G RAILs where the JOIN T SLEEPERs a re

loca ted w i th in the leng th o f t he FISH PLATEs

S G ab io n A meta l mesh con ta ine r used to ho ld rubb le and wh ich can be used as pa r t o f a

re ta in ing wa l l

T

T

T

T

Ga l l 1 . W ear o f the unders ide o f a RAIL FOOT caused by CH AIRs o r BASEPLATEs ab rad ing

the RAIL

2 . W ear o f the side o f the foo t o f a FLATBOT TO M RAIL caused by the supp or t ing BASEPLATEs abrading the RAIL

3 . W ear o f the W EB o f a RAIL caused by loose d istance BLOCKs in S & C

4 . W e a r o f t h e u p p e r su r f a c e o f t h e f o o t o f a FL A TB O TTO M R A IL ca u s ed b y t h e

f lex ing of RAIL CLIPs

T G an t ry rela y in g Re lay ing TRACK us ing SIN GLE L INE gan t ry TRACK lay ing m ach ines

S Ga r la n d A c ir cu la r channe l f i xed above the EYE o f a TUN N EL SH AFT and des igned to in te rcep t

a n d c a r r y a w a y w a t e r r u n n i n g d o w n t h e s h a ft ( A l so k n o w n a s l a u n d e r o r r i n g d a m )

T / S G a u ge se e TR A CK G A U G E o r STR U C TU R E G A U G E

T G a u ge co rn er Th e c u r ve d p o r t i o n o f t h e RA I L H E A D b e t w e e n t h e RU N N I N G S U R FA C E p r o f il e a n d t h e

R U N N I N G E D G E (se e Ap p e n d ix 2 D i a gr a m 1 )

T Ga u ge co rn er cra ck in g Smal l c lose ly spaced c racks a t the GAU GE CORN ER o f a RAIL and ex t end ing in to the

R U N N I N G S U R FA C E a n d / o r t h e R U N N I N G E D G E

T Ga u ge p o in t Th e p o s it i o n o n t h e RU N N I N G E D G E o f a R A I L f ro m w h i c h TR A C K G A U G E i s m e a su r e d

n o r m a l ly 1 5 m m b e lo w t h e C RO W N ( se e Ap p e n d ix 2 D i a gr a m 1 ) .

T Ga u ge ret en t io n M a i n t e n a n ce o f t h e d e si gn e d TR A C K G A U G E b e t w e e n t h e g a u ge f a c es o f RU N N I N G

RAILs

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T Ga u ge sp read An inc rease o f TRACK GAUGE b rough t abou t by wear o r de te r io ra t ion o f the TRACK

com ponen ts o r because o f h igh la te ra l fo rces

T Ga u ge st o p A m eta l p la te f i xed to the upp er su r face o f a t imb er o r wooden SLEEPER aga inst the

ou te r edge o f a CH AIR o r BASEPLATE to res t r ic t GAU GE SPREAD

T G au ge t ie ba r A n a d j u st a b l e me t a l b a r w h i ch m a y b e f ix e d a r o u n d t h e f e e t o f t h e R U N N I N G R A IL s o f

a TR A C K t o r e st o r e a n d m a i n t a in TR A C K G A U G E

T G au ge w iden in g The d es igned inc rease o f TRACK GAU GE on som e cu rves to ease the p assage o f a RAIL

vehic le

S

S

Gaug ing 1 . S et t i n g R U N N I N G R A IL s a t st a n d a r d TR A C K G A U G E a p a r t ( p l u s a n y a ll o w a n c e f o r

G AU G E W ID E N I N G )

2 . M easur ing L IN ESID E STRU CTU REs w i th re fe rence to the TRACK and assess ing

the i r pos i t ion re la t i ve to the STRUCTU RE GAUGE

T /S G eo gr id A m ate r ia l hav ing a la rge r mesh than a GEO TEX TILE and used as a s t reng then ing

m e d i u m f o r so i ls

T Geo t ex t i le A f ine m eshed m ate r ia l la id on a SUB G RADE t o inc rease the s tab i l it y o f the su r face

mate r ia l o r to separa te the na tu ra l l y occu r r ing ma te r ia l and the TRACK suppor t

ma t e r i a l s

T G la n d in g St rapp ing toge the r SLEEPERs to p rov ide add i t iona l s t reng th to a TRACK in a reas o f

FO R M A T I O N w e a k n e ss

T Glu ed in su la t ed jo in t An IN SULATED RAIL JOIN T in wh ich the comp onen ts a re resin bonded

RB Go o ds L in e A L IN E tha t h as no t been s igna l led to the s tandar d requ i red fo r run n ing passenger

T R A I N s

RT G ra d ien t The ra te a t w h ich a TRACK , road o r foo tpa th ga ins o r loses he igh t , o r the FALL in a

g iven d is tance o f a w a te rcourse o r D RAIN

S G ra p h i t ic co r ro sio n A b io log ica l co r rosion p rocess wh ich a t tacks cas t i r on when subm erged in b rack ish wa t e r

and is cha rac te r ised by so f t b lack depos i t s.

T SH B G reen Z o ne 1 . T h is is w h e re a sit e of w o rk i s e it h er :

Safeguarded by stopp ing TRAIN s on a l l L IN Es o r Fenced f rom t he neares t L IN E rema in ing open to m ovements o r Separa ted f rom the neares t LIN E rema in ing open to m ovement s by a d istance o f a t l e a st 6 f e et 6 i n ch e s (o r 2 m e t r e s) a n d y o u o n e o r m o r e SI TE W A R D E N s h a ve b e e n

a p p o i n t e d

2 . A sit e o f w o rk f or w h ich sp e cia l a rr a nge m en t s h a ve b ee n m a d e to st op t r ain s and sa feguard pe rsons work ing on th e s ite .

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RT K in em a t ic en velo p e The cross-sect ional prof i le o f a vehic le enlarged to inc lude the ef fects of dynamic sway

and ve r t i ca l movement caused by speed (dynamic e f fec ts o f ) TRACK CURVATURE and

CAN T, TRACK pos it ion to lerances , RAIL wear , RAIL H EAD /W H EEL FLAN GE c lea rances ,

veh icle wear and suspens ion pe r fo rm ance fo r the pa r t i cu la r TRACK loca t ion under

considerat ion

T K in g Po in t Th e TU R N O U T f o r m i n g t h e f ir st d i v isi o n o f a TR A C K i n t o a f a n o f S I D I N G s.

T K n u ck le Th e b e n d m a d e i n a n O B TU S E W I N G R A I L ce n t r a ll y a b o u t t h e i n t e r se c t io n o f g a u g e

l ines o f the POIN T RAILs ( see Append ix 2 D iag ram 3 )

(a lso known as E lbow)

T Ladder A ser ies o f SW ITCH and CRO SSIN G un i t s la id in succession ac ross a num ber o f runn ing

TRACKs to p rov ide fac i li t i es fo r TRAIN s to pass f rom one TRACK to a no the r

S Lan d severa nce A s itua t ion wh ich occu rs wh en land wh ich has accom m oda t ion r igh ts ac ross a RAILW AY

is acqu i red by d i f fe ren t owners and th e accomm oda t ion r igh ts a re the reby ex t ingu ished .

S La nd sl ip The m ovement o f an un s tab le mass o f so i l o r rock

T Lap A f lap o r f in o f m e ta l fo lded over and ro l led in to the su r face o f a RAIL du r ing

m a n u f a c t u r e

T La ser do zin g U sing a laser gu ided bu l ldoze r to g rade the bo t tom o f an excava t ion o r to level the

BALLAST BED o f a TRACK

T La t era l resist an ce The ab i l it y o f a TRACK to w i ths tand la te ra l d is to r t ion

T La t era l resist an ce en d

p l a t e

An L -shaped m eta l p la te , one end o f w h ich i s a t tached t o a SLEEPER o r T IM BER and

the o the r leg embed ded in the BALLAST SH OU LDER to inc rease the la te ra l s tab i l it y o f a

TRACK

T La t h s Leng ths o f wood o f sm a l l c ross sec t iona l a rea w h ich p laced a long the ends o f the

T I M B E Rs o r B ea r e r s o f a p r e - a ss em b l ed S W I TC H a n d C R O S SI N G l a y ou t a n d m a r k e d

w i th t he cen t re l ines and n um bers o f the TIM BERs o r Beare rs , to fac i l it a te th e re -

assem b ly o f the layou t on s ite

S La u nder see GARLAN D

T La y in g- in I ns ta l la t ion o f TRACK upon a p repared TRACK BED

T LC AM S A b b r e vi a t io n of LO W C A R BO N A U S TE N I T I C M A N G A N E SE STE E L

T Lea d se e T U R N O U T

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T

T

T

T

Lead length 1 . The d istance be tween the SW ITCH TO E and the in te rsec t ion o f the gauge l ines o f

t h e A C U TE C R O S S I N G o f a TU R N O U T

2 . The d istance be tween the in te rsec t ion o f gauge lines o f ACUT E CROSSIN Gs in

ad jacen t TRACKs

3 . Th e d i st a n c e b e t w e en t h e i n t e rs ec t io n o f g a u ge l in e s o f a n A C U TE C R O S SI N G a n d

t h e O B TU S E CR O S SI N G i n a d i a m o n d

4 . T h e d ist a n ce b et w e e n th e SW I T CH T O E a n d t h e N O S E o f t h e A C U T E C RO S SI N G

o f a T U R N O U T

T Lef t h a n d p a ra l lel w in g see PARALLEL W IN G le f t [ r igh t ] (ha nd s ide )

T Lef t ha n d sp l ice An acu t e FABRICATED CROSSIN G w h ich has the SPLICE RAIL o f the vee on the le f t o f

t h e PO I N T R A I L

T Lef t h a nd t u rn o u t A TU RN OU T in wh ich the STOCK RAIL set i s on the le f t hand s ide wh en v iewed f rom

t h e SW I TC H TO E l o o k i n g t ow a r d s t h e C RO S SI N G

T Leg en ds The ends o f the fou r RUN N IN G RAILs o f a FABRICATED CROSSIN G o r the equ iva len t

fo r a CAST CROSSIN G

RB

RT

Level Crossing Any m anned , au tom at ic o r OPEN CROSSIN G shown in Tab le A o f the Sec t iona l

A p p e n d i x

( Se e a l so C RO S SI N G , A C C O M M O D A TI O N C R O SSI N G , A U TO M A TI C LE V E L

CROSSIN G, OPEN CRO SSIN G)

RB Lever Push bu t ton , SW ITCH o r o the r con t ro l l ing dev ice fo r opera t ing s igna l l ing o r LEVEL

C R O SS IN G e q u i p m e n t

T Li f t f ish p la t e A FISH PLATE used to connec t toge the r RAILs o f the sam e sect ion bu t o f d i f fe ren t dep ths

a t a RAIL JOIN T

T Li f t in g Ad jus tmen t s to the ve r t i ca l p ro f i le o f the TRACK e i the r to co r rec t i r regu la r i t ies o r to

imp lemen t a new long i tud ina l p ro f i le

T Lin e see TRACK

RT Lin e sp eed Th e m a x i mu m s p e ed a t w h i ch t r a f f i c is a ll o w e d t o r u n o n a L IN E .

T SH B Line u nder Po ssessio n somet im es re fe r red to as ABSOLU TE POSSESSION t h is means tha t a r rangements have been made to suspend the no rma l passage o f T R A I N s

t h is enab les the m ovements o f EN GIN EERS TRAIN s (no rm a l ly in e i the r d i rect ion )where requ i red in connec t ion w i th the work tak ing p lace

t he l im i t s o f the POSSESSION a re no rm a l ly ind ica ted by red ban ner f lags o r boards o r r e d l ig h t s, a n d b y D E TO N A TO R s

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S Lined a rch see CLAD ARCH

RT Lineside se e O N T H E L IN E SI D E

RT Lin eside f en cin g The RAILW AY opera t iona l boundary fence o r hedge and any ga tes form ing pa r t o f the

o p e r a t i on a l b o u n d a r y

T

S

L in ing 1 . A d j u st m e n t s t o t h e A L IG N M E N T o f TRA C K t o ei t h er c or r e ct i r re g u la r i t ie s o r t o

i m p l e m e n t a n e w AL IG N M E N T

2 . Sh e e t in g o r o t h e r m a t e r ia l ( e .g . sp r a y e d c o n cr e t e ) f ix e d t o t h e S O FFI T o f a n a r c h o r

a TU N N E L in o r d e r t o d e f l ec t w a t e r i n g r ess o r t o a f f e ct r e p a i r s t o t h e a r c h / TU N N E Lface .

T Lip p in g 1 . L a t e r a l p l a st i c D E FO R M A TI O N o f a R A IL H E A D

2 . L o n gi t u d in a l p l a st i c D E FO R M A TI O N o f a R A IL H E A D a t a jo i n t

S Lla n t a rn a m t yp e b r idge se e W .R . B O X G I RD E R B RI D G E

RT Lo a d ga u ge Th e s p a c e w i t h in t h e S TR U C TU R E G A U G E w h i ch c o n st r a i n s t h e m a x i mu m s iz e o f

veh icles and t he loads wh ich m ay be ca r r ied on a TRACK

RT Lo ad in g d o ck A PLATFORM used sole ly fo r the load ing an d /o r u n load ing o f l i vestock a nd goods

E Lo ca l ea r t h Por tab le app l iances fo r es tab l ish ing a n e lect r i ca l connec t ion be tw een iso la ted

O V E R H E A D L I N E E Q U I PM E N T a n d t h e R U N N I N G R A IL t r a ct i o n cu r r e n t r e t u r n ci r cu i t

RB Lo ca l M a n a ger W here au th o r ised , inc ludes a pe rson who is a Superv iso r and has been pa ssed as

compe ten t in the approp r ia te Ru les and regu la t ions

T Lo n g w a velen gt h

cor ruga t ions

C O R R U G A TI O N s w i t h a w a v e le n g t h gr e a t e r t h a n 5 0 0 m m

T Lo n g w elded ra i l A RA I L u p t o a ma x i m u m l en g t h b et w e e n FI SH PL A TE D JO I N Ts o f 3 6 m p r o d u c e d b y

we ld ing toge the r two o r more RAILs

T Lo n gi t u d in a l cha n ge o f sect ion

The a rea on a CAST CROSSIN G wh ere the c ross sec t ion changes f rom tha t o f a n o rd ina ry RAIL to a box

T Lo n gi t u d in a l levels TRACK leve ls and p ro f i les a long the TRACK

T /S Lo n gi t u d in a l sect io n D raw ing show ing TRACK leve ls , GRAD IEN Ts, VERTICAL CURVEs, d ra inage and re levan t

STRUCTU RE and PLATFORM leve ls w i th ap prop r ia te Ordna nce Survey and add i t iona l

t e mp o r a r y b en c h m a r k s r e f er e n ce d t o t h e O . S.D a t u m a t N e w l yn .

T Lo ngi t u d in a l t im ber A T I M B E R BE A R er p a r a l l el t o a n d su p p o r t i n g a R U N N I N G R A IL

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K M in ia t u re Red/Green

L igh ts

A n a lt e r na t iv e t e rm f o r M I N I A T U R E W A RN I N G L I GH T S

Abbrev ia ted to R /G

K M in ia t u re W a rn in g

L igh ts

A n A U TO M A TI C L EV E L C RO S SI N G e q u i p p e d w i t h m i n ia t u r e r e d / g r ee n w a r n i n g l i gh t s

opera ted by approach ing t ra ins .

A b b r ev ia t e d t o M W L

RT M in im um a ct io ns Those ac t ions wh ich mu s t be ca r r ied ou t to sa feguard the p assage o f TRAIN s and

m in imise the e f fect o f ca tas t roph ic fa i lu re

T M i n im u m ba l last dep t h The sha l lowes t dep th o f c lean BALLAST t ha t i s to be p rov ided be low t he SLEEPERs,

TIM BERs o r beare rs a t the t ime o f re lay ing

T M in im u m f la n gew ay The min imum d is tance spec i f ied be tween the gauge face o f a STOCK RAIL and the

B A C K E D G E o f t h e a d j a ce n t , o p e n , SW I TC H R A IL

T M in im u m ra i l dep t h The sm a l lest ove ra l l dep th o f a g iven RAIL SECTION , measured ou t s ide o f any RAIL

GALL , pe rm i t ted in a TRACK

T M in im u m ra i l

t e mp e ra tu re

The lowes t RAIL tem pera tu re reco rded du r ing the FASTEN IN G down o f un s t ressed

C O N T I N U O U S W E LD E D R A IL

Abbrev ia t ion : M RT

S M in o r rep a i r s L imi ted s t ruc tu ra l o r super f i c ia l repa i r s, necessary to m a in ta in a p a r t o f th e

IN FRASTRUCTU RE in a cond i t ion f it f o r the pu rp ose in tended

T M isa l ign m ent D E FO R M A TI O N o r d i sp l a c em e n t o f a R A IL o r TR AC K f r o m i t s d e si gn e d A L IG N M E N T

T M o vea b le Len gt h Th e p a r t o f a S W I TC H b l a d e t h a t mo v e s w h e n t h e d i r e ct i on o f t h e S W I TC H i s c h a n g ed

( se e A p p e n d ix 2 D i a gr a m 2 )

S M ul t i -st r ike b r idge A BRIDGE tha t has su f fe red th ree o r more b r idge s t r i kes w i th in any 12 mon th pe r iod

RT M ul t ip le t ra ck R A IL W A Y h a vi n g mo r e t h a n t w o TR A C K s

K M W L A b b r ev ia t io n f o r M I N I A T U R E W A RN I N G L I G H T S

T N ( ma t h e ma t i ca l e x p r e s si o n ) c o t / 2 w h er e = ang le o f a CROSSIN G in degrees

T N at u ra l cro ssing A n A C U TE C R O S SI N G w h o s e a n g le , w h e n f o r m e d i n t o a TU R N O U T w i t h S W I TC H e s o f

a spec if i c descr ip t ion , pe rm i ts the use o f a TU RN OU T cu rve equa l f rom the SW ITCH

H EEL to the in te rsec t ion o f the gauge lines o f the ACU TE CROSSIN G and w h ich has a

r a d i u s e q u a l t o t h e SW I TC H R A D I U S

T N at u ra l t u rn o u t Th e p a r t i c u la r c a s e of a TU R N O U T i n w h i ch t h e t a n g e n t s t o t h e A CU T E C R O SS IN G a n d

t h e SW I TC H H E E L p r o d u c e a TU R N O U T c u r v e r a d i u s e q u a l t o t h e r a d i u s o f t h e

SW I T CH c u rv e

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T Piecem ea l rela y in g Re lay ing TRACK w h ich has no t b een p re -assem b led o r on ly pa r t l y p re -assem b led ( i .e .

CROSSIN Gs)

RB Pi lo t m a n A person who has been app o in ted to m anage the passage o f TRAIN s ove r a SIN GLE

L IN E dur ing a fa i lu re o f equ ipm en t , o r repa i r s o r due to an ob s t ruc t ion

T Pip in g A norm a l ly in te rna l de fec t wh ich can be in one o r m ore o f the head , W EB o r foo t o f a

RAIL, resu l t ing f rom the sh r inka ge cav it y f rom the o r ig ina l s tee l ingo t

T Pi t ch in g A laye r o f la rge stone la id on top o f th e SU B GRADE a t the t im e o f const ruc t ion o f a

R AI LW A Y

RT Pla in l in e T R AC K w i t ho u t SW I T C H E S A N D C RO S SI N G S

RT Pla in l in in g R e p la c e me n t o f S W I TC H e s a n d / o r C RO S SI N G s b y PL A IN L IN E

T Pla in ra i l A RAIL , w i th o r w i thou t F ISH BOLT o r BON D a t tachm ent ho les, wh ich has no t o the rw ise

b e e n b e n t o r m a c h in e d .

T Pla n in g len gt h Th e l e n gt h m e a su r e d a l on g t h e SW I TC H R A IL f r o m t h e S W I TC H R A IL TO E t o t h e e n d

o f t h e h e a d p l a n i n g a t w h i c h p o i n t t h e n o r ma l o f f se t t o t h e S TO C K R A I L is 7 0 m m w i t h

the SW ITCH RAIL in the c losed pos i t ion

T Plan in g rad iu s Th e r a d i u s o f t h e h e a d p l a n i n g o ve r t h e P LA N I N G L E N G TH

T

T

Plan t ra i ls 1 . RAILs ins ta lled temp ora r i l y in to a TRACK in read iness fo r the remova l o f the TRACK

in pane ls

2 . The RAILs used to bu i ld up TRACK PAN ELs fo r laying in to a TRACK and wh ich m ay

ca r ry no rm a l se rvice t ra f f i c a t reduced speed

(a lso known as Serv ice ra i ls)

S Pla t f o rm The ra ised STRUCTURE w i th in a STATION o r depo t p rov id ing access to o r f rom a

TRAIN

S Pla t f o rm co p in g Vi t reous b r ick , concre te o r m asonry slab a t th e edge o f the PLATFORM ad jacen t to

R AI LW A Y

S Pla t f o rm fu rn i t u re M o v ea b l e o r se m i - p e r ma n e n t e q u i p m e n t o r a p p a r a t u s p l a c e d u p o n a PL A TFO R M f o r

the use of passengers

T /S Pla t f o rm ga u ge An im p lem en t fo r set t ing o r check ing c lea rances be tween PLATFORM s and ad jacen t

TRACK(s)

S Pla t f o rm h eigh t Th e v e r t ic a l d im e n si o n me a s u r e d f r o m t h e p l a n e o f t h e RU N N I N G S U R FA C E s o f t h e

RAILs to the sur face of a PLATFORM

S Pla t f o rm len gt h Th e d i st a n c e b e t w e e n t h e t o p s o f t h e PL A TFO R M e n d r a m p s

RT Pla t f o rm l in e TRACK a t a STAT ION wh ich has a PLATFORM face p rov ided a t one o r bo th sides

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T Ra i l t en so rs H y d r a u li c d e vi ce s u se d f o r e x t e n d i n g CO N TI N U O U S W E L D E D R A IL b y c a lc u la t e d

am oun ts du r ing s t ress ing opera t ions .

T Ra i l t est in g syst em Th e U L TR A SO N I C RA I L FLA W D E TE C TI O N t e st i n g eq u i p m e n t t o g et h e r w i t h t h e

suppor t ing t ro l ley

T Ra i l t u rn in g 1 . M an ipu la t ing RAILs in to the requ i red a t t i t ude

2 . Tu r n i n g R A IL s t o p l a ce t h e p r e s en t O U TS ID E E D G E o n t h e RU N N I N G E D G E si d e

T Ra i l t u rn in g ba r A s tee l ba r hav ing a spec ia l l y shaped end fo r the m an ipu la t ion o f RAILs

T Ra i l w eb 1 . T h e p a r t o f a n o r d in a r y RA I L SE C T IO N b e t w ee n t h e h ea d a n d t h e f o ot ( se e

A p p e n d ix 2 D i a gr a m 1 )

2 . Th e p a r t o f t h e c r o ss- se ct i o n b et w e e n t h e h ea d a n d t h e f o ot a t t h e LE G E N D s o f a

CAST CROSSIN G.

RT Rai l t ra ck Co n t ro l led

In f ras t ruc tu re

IN FRASTRUCTU RE, a reas o f land a nd o the r p rem ises ei the r con ta in ing an

OPERATION AL RAILW AY LIN E o r fo rming pa r t s o f the con t ro l sys tem fo r

OPERATION AL RAILW AY LIN Es, con t ro l led by Ra i l t rack . Con t ro l led m eans the

respon sib i li ty for the s ignal l ing or e lectr i f icat ion system used by the m oving RAIL vehic les.

The a r ea is tha t w i th in w h ich the opera t ion o f RAIL veh ic les crea tes po ten t ia l haz a rds .

RT Ra i lw a y A t ra nspor t system es tab l ished fo r th e gu ided p assage o f veh ic les hav ing FLAN GEdw heels, usual ly o f s tee l

RT Ra i lw a y Fo g Sign a l A sma l l d isk -shap ed w arn ing dev ice , designed to be p laced on t he RAIL H EAD fo r

p ro tec t ion and em ergency pu rp oses , wh ich exp lodes wh en a T RAIN passes ove r

a l so k n o w n a s D E T O N A T O R

T Ra ised ch eck ra i l A f la tbo t tom CH ECK RAIL wh ich i s suppor ted u pon spec ia l BASEPLATEs such tha t the

C R O W N o f t h e C H E C K R A IL is a b o v e t h e le ve l o f t h e C R O W N o f t h e R U N N I N G R AI L s

T Ra m p en d R a mp e d s ec t io n a t t h e e n d o f a C O N D U C TO R R A IL t o g u id e t h e t r a c t io n c u r r e n t

co l lec t ing dev ices on to the CON TACT SURFACE o f the CON D U CTO R RAIL

T Ra t e o f ch an ge o f ca n t The CANT GRADIENT re la t i ve to the max imum speed o f a veh ic le pass ing ove r a

TR A N S I T I O N C U R V E .

T Ra t e o f ch an ge o f ca n t

def ic iency

Th e C A N T D E FI C IE N C Y G R A D I E N T r e l a t i ve t o t h e m a x i mu m s p e ed o f a v eh i cl e p a ss in g

o v er a TR A N S IT I O N C U R V E .

T Re-ga u gin g Pul l ing RAILs back to the corr ect gauge and r efastening to th e SLEEPERs, TIM BERs or

beare rs

T Re-p a dd ing Renewing RAIL PAD s

T Re-p ro f i l in g The res to ra t ion o f the t ransve rse p ro f i le o f a RAIL head by e i the r g r ind ing , m i l li ng o r p l a n i n g

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T RE/PW draw in g A b b r e vi a t io n f o r RA I LW A Y Eq u i p m e n t - PE R M A N E N T W A Y d r a w i n gs. A r a n g e o f

d r a w i n g s f o r st a n d a r d c o mp o n e n t s f o r b u ll h e a d a n d f or f l a t b o t t om PE R M A N E N T W A Y .

They a lso inc lude genera l a r rangem ent d raw ings and o th e r s tandard de t a i l s

T Rea l ign m en t Th e r e d e si gn o f t h e A L IG N M E N T o f a TR A C K o r TR A C K s

se e a l so C U R V E R E A LI G N M E N T

RT Rea so na b ly p ra ct ica b le The ba lance be tween th e degree o f r i sk a nd aga ins t the t im e , t roub le , cos t and p hysica l

d i f f icu l ty o f contro l l ing the r isk.

T Reba l la st in g Th e r e m o v a l o f t h e e x i st i n g B O X I N G - IN B A LL A ST, B A LL A ST S H O U L D E R s a n d B O TTO MBALLAST to a p rede te rm ined dep th a nd i t s rep lacement b y c lean BALLAST

RT Recep t io n l in e TRACK w here veh icles aw a i t a t ten t ion o r so r t ing

T Recycled ba l la st B A LL A ST w h i ch h a s b e e n s ep a r a t e d f r o m u n w a n t e d f i n e ma t e r ia l a t a d e p o t o r t i p a n d

m ade ava i lab le fo r re -use in the TRACK

RB Red Z o n e A s ite o f w ork m us t be c lass if ied as a Red Z one i f :

i t is O N O R N E A R T H E LI N E a n d i t h a s n o t b e e n p o ssi b le t o se t u p a G R E E N Z O N E

RT Redu n da n t t ra ck TRACK in -s i tu bu t su rp lus to opera t iona l requ i remen ts

TSH B

S

S

Refuge 1 . A n a r ea w h e r e it i s sa f e t o st a n d w h e n a T R AI N p a sse s

2 . A r e ce ss in t h e SI D E W A LL o f a T U N N E L w h er e it i s sa f e t o st a n d w h e n a T R A IN

passes (See App end ix 2 D iag ram 4 )

3 . A f en c e d p l a t f o r m c a n t i le ve r e d f r o m a B R ID G E or V IA D U C T f o r m i n g a sa f e p la c e t o

s tand when a T RAIN p asses.

RT Refu ge sid in g SI N G L E E N D E D S I D I N G o f f a RU N N I N G L IN E u se d f o r TR A I N r e g u la t i o n p u r p o se s

RT Rel ief l in e A SE C O N D A R Y L IN E w h i c h r u n s a l o n gs id e a M A I N L I N E

RB Rem in der a p p l ia n ce A dev ice o r con t ro l used to rem ind the s igna lm an tha t a pa r t i cu la r LEVER, bu t ton o r

SW I TC H m u s t n o t b e o p e r a t e d o r o n l y u se d u n d e r c e r t a i n c on d i t io n s

RT Rem o del l in g Al te ra t ion o f a TRACK layou t to p rov ide fac il i t ies d i f feren t f rom those ex ist ing

T Ren ew a l o f W a y Rep lacement o f T RACK w h ich i s deem ed to be l i f e exp i red fo r the ca tegory o f L INE in

wh ich i t i s loca ted ( see a lso PREM ATU RE REN EW AL o f TRACK)

T Rera i l in g Removal o f ex ist ing RAILs and insta l la t ion of new or SERVICEABLE RAILs

T Resleep er in g The process of rep lacing a l l the SLEEPERs in a TRACK

E Ret urn co n duct o r bo n d A B O N D w h i c h c on n e c t s a r e t u r n c on d u c t o r t o a TR AC TI O N C U R R E N T R E TU R N R A IL

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T Ret u rn ed ba l la st BALLAST wh ich i s re tu rned to the TRACK a f te r hav ing been separa ted f rom unwan ted

f i n e ma t e r i a l b y e it h e r a B A L L AS T C L EA N I N G m a c h i n e o r o t h er m e t h o d s

K Reverse S & C : Th e o p p o s it e p o s it i o n t o N o r m a l

T Reverse cu rve Tw o abu t t ing cu rves o f OPPOSITE FLEX U RE o r hand .

RT Reverse p o in t The po in t a t w h ich two abu t t ing cu rves o f OPPOSITE FLEX U RE o r hand ha ve a com m on

tangen t

RT Reversib le l in e A TRACK on wh ich t ra f f i c may be worked in e i the r d i rec t ion

T Ridem et er An e lectron ic device for vehic le r ide assessm ent

T Righ t h a n d p a ra l lel

w in g (R H PW )

see PARALLEL W IN G le f t [ r igh t ] (ha nd s ide )

T Righ t h a nd sp l ice An acu t e FABRICATED CROSSIN G w h ich has the SPL ICE RAIL o f the vee on t he r igh t o f

t h e PO I N T R A I L

T Righ t h a n d t u rn o u t A TU RN OU T in wh ich the STOCK RAIL set i s on the r igh t hand s ide STO CK RAIL when

v ie w e d f r o m t h e SW I TC H TO E l o o k i n g t ow a r d s t h e C RO S SI N G

RT Righ t sid e f a i lu re A m ode o f fa i lu re wh ich causes a p iece o f equ ipm en t to cease func t ion ing bu t w i thou t

com prom ising the sa fe ty o f TRAIN s

S Ring da m see GARLAN D

RT Ro ad -Ra i l Veh icle A v e h ic le m e e t in g t h e r e q u ir e me n t s o f R a il w a y G r o u p S t a n d a r d G M / R T1 3 0 0 t h a t c a n

t rave l on the road under i t s own pow er and a lso t rave l on the RAILs by v ir tue o f a RAIL

wh ee l gu idance system . A road- ra i l veh ic le is pe rm i t ted to t ra ve l on the RAILs on ly w i th in

a POSSESSION

T Ro l l in g co n t a ct f la w A de fec t on o r jus t be low the RUN N IN G SURFACE o f a RAIL caused by the in te rac t ion

of s tee l w heels on steel RAILs

RT Ro u t e a va i la b i l i t y An a lpha -num er ic code wh ich ind ica tes the capac i t y o f a LIN E to ca r ry a g iven ax le

we igh t and spac ing

S Ro u t ine o bserva t io n An in fo rm a l exam ina t ion ca r r ied ou t by any pe rson in the no rm a l cou rse o f h is du t ies .

T Rubb in g f ace Th e f a c e o f a C H E C K R A I L a g a in st w h i ch t h e b a c k s o f t h e W H E E L FL A N G E s m a y

con tac t

RT Rul in g gra d ien t The s teepest GRADIEN T used on a sec t ion o r a rou te o f RAILW AY

RT Ru n -t h ro u gh An unau tho r ised t ra f f i c movem ent in a TRAIL ING d i rec t ion th rough a SET OF

SW I T CH E S, SW I T CH D I A M O N D o r SW I N G N O S E C RO S SI N G r e su l ti n g i n d a m a g e to

the TRACK

T Ru n n in g ban d see CON TACT SURFACE

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T

K

Sand dra g 1 . A sh a l lo w t r o u g h c o n st r u c t e d a r o u n d a TR A C K , u s u a ll y a t a s e t o f TRA P PO I N TS ,

wh ich i s f i l led w i th sand o r g rave l to dece le ra te a veh ic le mak ing an una u tho r ised

m o v e m e n

standard definitions of civil

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