3370 3

1. Indian Standard wenns)
CODE OF PRACTICE FOR
CONCRETE STRUCTURES FOR
THE STORAGE OF LIQUIDS
PART Ill PRESTRESSED CONCRETE STRUCTURES

(Cinch Reprint APRIL 1992)

621.642.3:624.953:666.984

© Copyright

BUREAU OF INDIAN STANDARD.

Jemary

2. 3970 (Past I) -1967

Indian Standard
CODE OF PRACTICE FOR
CONCRETE STRUCTURES FOR
THE STORAGE OF LIQUIDS
PART Ill PRESTRESSED CONCRETE STRUCTURES

‘Cement and Concrete Sectional Cor

man Arme

tha à

WUREAU OF INDIAN STANDARDS

3. 1843570 Part 1)-1967

(Cod fm og)

sien cease tie
oe oat et Eng Re One (CSR

2 Gros (Am
Su Ro ng, Mii rar
ES ‘Siete ea STE AS eae oe

Concrete Subo 62:2
Sm 5.8. Jon A Ja & Co La, Bombay

EEE ein
a Mom no monaco
re BASE ho "ane CE)

Da, Ba Par Cm Poe Cana
RS LE o, Paye un ja Ouais

Fan (dln
‘gl Read Reach faite (SER), New

id et 2)

4. 15:3570( Pare 111) 1867

Indian Standard
CODE OF PRACTICE FOR
CONCRETE STRUCTURES FOR
THE STORAGE OF LIQUIDS
PART Ill PRESTRESSED CONCRETE STRUCTURES

FOREWORD

ing Division Co
02 Then

de ciega

Part I General requirements

Part JE Reinforced e vas
rons of his dard

the storage of lds, the general prov

See with auch modicaions a

eEhdisbos in the design of ret nn

pages a

5. 15:9870( Part 11)-1067.

0.4 While the common methods of desen and construcion hase been
feign letra ol special fons or under unual

lo de judement of the engineer and in

of design and pau my Be persisted em

these adequsey and say by

5 In this standard it bar been awumed that the design of preste
‘Concrete quid retaining actes eneased o a quahled engine and.
that the enteuon of he work à carried ut under the diction
06 AU requiemen 19549 and 18: 1313-1960 in vo fr as
they a ode execpt where er
7 The Sectional Committe reaponitte for the preparation of this
andar has taken ino consideration the views of engineer and techno-
“and has cited the standard to the practices followed In the country
Zed.” Due weightage bas algo been given to the need or Inter
matinal ‘co-ordination “between die standard preyalling in, diferent
ile ofthe world. These considerations led the Sertional Commitee
derive autance fom published material ofthe flowing. organiza

Bris Standards Institution
Portland Cement Asociation, Chicago, USA
Institution of Civil Engineers London.

8 For the purpose ol deciding whether a particular regsirement ofthis
Standard is complied wit, the Anal value, observed er Elsie, expres
Ang the. result of Aut ce anal, shall be rounded off in accordance

The ‘momber of serian: places retained in the
Younded olf value should De Ihe samme as that of te apecod value
fn thie standard

1. SCOPE
LA This standard (Part UL) lays down the requirements applicable
‘pecially to the petraced concrete structures forthe storage of igus,
main water, "These requirements are in addition to the ge
requirements aid down in 13" 3590 (Part 1)-1985
{Onde ofprace fr pre cores
oran of mel ae re).

oat of pres for cor sure fer br ore of Sis Per 1 Come

4

6. 1518970 (Pare UI) -1967

12 This code does not cover the requirements for reinforced and pre
red concrete structure for storage of hot liquid sad guide of Low
Méca and high penetating power tke perl, die! ol, ec. Special

Ge of shrinkage aig ithe storage of nomaqueo liquida and
ema ecemety where chemical satis poniie areal ct ait
‘with. The recommendations, however, may generally be applicable tothe
Horage a normal temperatures of aqueout aqua and lations which
Rivets écttinenal sein on conctes and tel or where ruflient
cons are taken to eme protection of concrete and wee! rm.
Rae due tection of sur Haie a do te eue of soa

2. GENERAL REQUIREMENTS

24 Design and construcion of presvened concrete liquid retain
four shall comply wih the refbrements of 1S 3870 (Dart 1) 1963"

3, DESIGN

31 General — Provisions shall be made for all condiins of tres that
ay oscar im accordance withthe principles of mechanics: recognised
‘ethods of design and sound enginerig practice, In particular, adequate
‘ousderation sal be given tothe ecos of manch construction in the
ment of bending moment and shes.

31.1 Belore aking up the detailed design the designer shoul satis
mt om the orret imation of fonds and on he adequate statis!
‘qulielom ofthe tructore, particularly In regard to salty agas over
‘ming of overhanging members fa he latter cae the generat arrange.
ment should be such that staal equlibeium shoud: De sacd ven
‘when the overturning moment is doubled

3.2 Basis of Design

132.1 General basis of design sal be in ine withthe recommendations
of IB: 912 1300f except where otherwise speiied inthis codes The
‘embers other than thos per on 32.2 al be designed in accordance
withthe requirement of 15: 13.1860.

322 The design of members in contact with the quid on any face or
cnciung the space above the liquid shall be based on consideration of
qua reinos 10 cracking a» well a adequate strength, and te

tng Das rarement auld a he sxc
a) The computed tres in the concrete apd in the steal all not
‘aceed the permisible creme given fo 93 and 34, dung
Kramer, Bundling and construction, and under working loads
EE Be nen nc de reg PG
Gade a pace fr prod cr

7. 1813570 (Part II) =1961

) Cracking o the liquid retaining face should be entry avoided
‘The lqulvetainng face auld be checked agua eraking with
2 lou Tetra lo the rai of the total (dead ive) Toad at
‘cracking to te total (dead + ve) working Ind of 2.

Im eimating the restanceto cracking, th srener in any crow
fection should be caused sr lor a homogencoss material,
aking sllowance fr al lage sel ine

The ultimate load at Blue (dead + ive) should aot be ls dha
tics the working (dead ive} load

Where fund necesary provision should be made by suitable joints
or otherwise o allow for caste dons of the srueture during,

32. For cylindrical tanks, additonal requirements as specied in 7.
shold aio be safe.

33 Permissible Stresses in Concrete

334 The permimible nrewes in the concrete due to presresing
pacas and working loads, and the modules of canichy Of concrete

SR be as speed fn 15 1943-1960"

332 For extimation of reitanee to cracking, the Limiting, tensile
sue of cree shall be amumed 0 have the values speed in
Table.

NS

8. 1542970 Part 11-1967

34 Permiseble Stresses In Steel

342 The permisible stremea in pretrening see and the modulos of
sty of ll shall be ar poca fy 18: 138-1960"

342 Where circumferemial wire or bars are tesionod by means of
nc, the lnc duc to fiction may be found by reducing the scene of
Fon to 0 percent of that given in 18: 1945 1900

33 Shrinkage and Creep of Concrete —The proviions regarding
age and cop shall comply withthe requirements of 18: 19151900"

35.1 Where reserves are protected with an internal impermeable
lings consideration should. Be given tothe pool, of concreto
ental dg on, "alo the ntti a he Bag hg
Fete deg properties allomance for the ncresed eect of
sing hie should be made i e deg

13.6 Lonsen in Prestrens — While aueuing the sees in concrete a
feu during tensioning operations and later inservice, de regard hall be
pid 10 agus and var in sear zaling Kom erc of concrete
End sete sita ler, ie ones ler at a,
[ston and sip of anchorages Requiremene In dh respect ape in
S71545-19608 shal be complied with "

4. FLooRS

4.1 Provision of Movement Joizts — Movement jolts shall e provided
In aecordanee with 8118970 (Part) 1965)-

42 Floors of Teaks Resting on Ground — Ihe tank eno dieily
{ts Boor may be fonstected of concrete withthe nominal per
Coni of rterecment (nor le han O15 percent of gro cromacctmal
Se Ef eee) provided tat ite enaliced ‘har the ground wil
Sey the load without appreciable mibeidence ln any pare and that the
rete oor i eatin panel not more than 43 maces square With
Shiva o expansion Jima berwesns In uch ease a rec layer of
‘onsrete not Le ban 73 mm thick shall be placed on the ground and
Covered over wath a wing layer of bitumen paper cr other mutable
‘Steal Yo deioy the bond between the red and door concrete.

‘42.1 Under normal circumstances the sered layer shal not be of grade
not leaner than M00 speed in Table 3 of ISS 4561008{3, where

pt fr ene erie foe te rage of guide: Part 1 General
Code of proctor pin an ed eo (mm mii

7

9. 1843870 (Past I) -1967

injurious sls or aggrenive water are ex
{rade not leaner tan MISO apecibed ln Table 3 of IS: 4901004" and i
Fc a sulphate reiting oto rect sould be med.

5. WALLS

5. Provision of Joints

SLA Sia Joint tthe Das ofthe Wall — Where itis dei

tne wall to Cipand or contract separately E
rene a the base ofthe wall ou

ms maybe employed.

511. Considerations sein be spacing of vertical movement
Seine are eue In O of 1S: 3370 (Pare PS6. Wie the m
ic joins may D
Joint of the expan
Bre ef 3500 (Part VS

52 Effect of Earth Pressure — When a reservoir wall is built in the
‘round or has earth ee against ee In bending moment due o
‘Stultnous acon of water preus inde the wall and earch pressure
side the wall may be made, provided that
8) there i o rik of tip in the embankment or fear of a reduction
Inthe earth prosurtavsing fran Shingo oe other cause and
2) Ge earth premore allowed by way ef zit in the bending
‘moment calcd by inter) wate presse hoc be the mii
‘hich can be eed upon under louable condone
ponible inelading those un telat be tested
Beraten

1 Provision of Movement Jo ¿te pom of ame
fated ching, i import to ensure thar movesten ent In Oe
Rettcomcpond th thee En wally if oc and wala n

orion Y cado by ets où à ang fect for move

Fi the wal,

62 Loading — Fix covers ofan shouldbe designed fe ra

Such the weight of Too aby earth covey if ay lve onde and
fBsthanisal jument, They Would io be designed o upward fad Y
ihe ok des to internal ger premio

10. 1523970 (Pare 11). 1967.

al Load sucient to ensure safety with the unequal
intensity of landing which occurs during the placing of the earth cover
Should be allowed for In desgring rock. The engine i
leading under hte temporary contitons, whieh shuld nat be essere.
In deagning the roo allowance. should be made or the temporary
ondition of some span ined and other spans unloaded, en though in
‘he ial sate the load may be small and evenly tie

6.2.2 In tanks having cd or Rating covers the gut pressure developed
above liquid surface shal be added to uid
In cate of tanks intended
ine soot seal be ma
achieved by liming’ the are as for the re of the tank or by thew
ing al waterproo ne or similar othe icon mean.

6.4 Protection Against Corrosion —Protetive mesures shall be pr

2 quid ese face, particular care beng taken that the

7. CYLINDRICAL TANKS

7.4 Stress 1 the den of pren conce oil m
ing aie in tel and concrete after allowing fr all loses
be invetigated and thelr wales should be widin the mir Pro
1033 and Dd, except where other pci below!
Maximum tene ques ia hoop steel or longitudinal ste at
img load should not exceed the mir specie in 34

1) The principal compresive stress in concreto should not exceed
‘need ofthe ies works cube

The average shear set on the gros o the concrete
‘hould not exceed ofthe speed works cabo strength

When the tank je ful, there should be a e

Concrete at al points of atest emo

When the tank is empty, there should at no point be a tensile
ren greater than 0 Len Where the lis be emptied
and led st fequent neral, or may be let empty for à
prolonged period, Wis dearable to design the tank so {ht there
EMP resioual compresion when dhe tank I empty as wel as when
EN

72 The base ofthe wall may be designed cier fixed withthe Boor or at
¿lin ov hinged at the Junction mit the or.

11. 15:3070(Pare I) 1967

7.2. Exsept in case of unyielding solid rocky sub-grade, care should be
taten to minimize the danger of ic! seulement “Th can be done Sy
Besgalz the for us a thts membrane and by providing à oundnion
ing under de wal
7.3 When a he base ofthe wal, hinged or sliding condition preva

3) ay advantage feed bythe essing ec sold be gore,
1) the moments in the region of the wall base in the direction
Parallel to mi ofthe tank. (Sealy verien) caused by the
‘steaning eco of presresingatihe wall base shal be counted
di. Val given a abe 18890 (ar 1) may Deep
74 The ring proteins should be designed in al ces on the assumption
that the valet i Bet to aide without fictional esatances When the
{bot of tae wall fee ts side, longitudinal moment shoud be and
Sn abe bast of a reine cual to anexa ofthat provided by a pinnod
ot. In othe cues the longitudinal moment should be amened en the
Actual degree of restant atthe wallfoot
75 Allowance should be made for the longitudinal moment induced by
the transverse sc i the partially wound condition. "The maximum
aloe of the Besar res otc longtadinal section rom this cause may
De asumed vo be numerically equal 190 times tering Compresion stress
7.6 Prenesóng should be provided in the transverse and longitudinal
ction a3 ar lo contain these elects within the cial ae

ES

Hs the cables should Be place Inde the walle and routed

7.8 When he seing o de pening wire poet ne arc

Sd placed at nb pains of te epinder witha vo to sc the
avy frictional loses,

tion ofrese resulting from the presure of contained

any, temperature, Arinkage, roi

17.10 Necesity of prestreing the elinder wall i the direcion of the axis
the splint (eral) should always be vegas

12. 1813970 (Pare TI)--1967

11 Longitudinal prestresing may be replaced wih a enforced concrete
con sing de equements of 189370 (Part I

8. DETAILING

8.1 Concrete Cover — The minimum cover to preitrening rod, wires or
able, and to shesthings and spacer Y present hal be 39 min on the
quid face.

8.12 For faces away rom the liquid and for parts of structure not
conti the ged, the cover shall confor to the requirements of

NO

82 Spacing of Prestreselag Steel— The requirements of IS: 1343
{seot al Be complied with a:

9. WORKMANSHIP, INSPECTION AND TESTING

94 In addition tothe requirement spaced in 15: 3970 (Part 1)-1965%,
the requirements af 1: 1243-1960" all be compl with

u

13. 151 $970 (Pare I) 1967

en)

mies Rens
Par 6.6 onan en! Eneas eh Gare (CSIR),

soap Re

14. BUREAU OF INDIAN STANDARDS

à Feen mar te. en, Atnapagaosnen a

inspection its (th Sue Pam)
Mon rs Pot, 20 Me Coun an.

15. MEXDMENT MO. 1 OCTOBER 1981

0

15:3970(Part 111)-1967 CODE OF PRACTICE FOR
CONCRETE STRUCTURES FOR THE STORAGE OF LTOUIDS

PART III PRESTRESSED CONCRETE STRUGTURES

Alteration

(Page 3, clama 0.3) - Subutitute the following
for the existing clause:

"0.3 Although the provisions of this code cover matniy

ructures for the storage of Liquids, the general
Tenuirementa given in Part 1 of this code may
Generally apply to the design of reinforced concrete
Ad prestressed concrete structures for the conveyance
GE liquida, such as aqueducta and muperpassages; the
Other requirements given in the code may also be
Applied with appropriate modi fieati