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REINFORCING DETAILING
OF R.C.C MEMBERS
PRESENTED BY
Er.T.RANGARAJAN,B.E,M.Sc(struct.engg),F.I.E,FACCE,LACI,LISSE,LIASE
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WHO IS AN ENGINEER?
Accordin !o "SA Pr#$id#n! H#r%#r! Hoor, '(o '$ n
#nin##r %#*or# (# %#c+# o-i!icin, $idT(# r#! -i%i-i!/ o* !(# #nin##r 0co+r#d !o +#n o* o!(#rro*#$$ion$00i$ !(! (i$ 'or1$ r# o2! in !(# o#n '(#r# --cn $## !(#+.
Hi$ c!$ 0..$!# %/ $!# 0r# in (rd $2%$!nc#$.
H# cnno! %2r/ (i$ +i$!1#$ in !(# r -i1# !(# DOCTORS.
H# cnno! r2# !(#+ in!o !(in ir0..or %-+# !(# 32d#0..-i1#!(# LAWYERS.
H# cnno!, -i1# !(# ARCHITECT, cor (i$ *i2r#$ 'i!( !r##$ nd&in#$.
H# cnno!, -i1# !(# o-i!icin$, $cr##n (i$ $(or!co+in$ %/%-+in (i$ oon#n!$0.nd (o# !(# #o-# 'i-- *or#!. T(#
ENGINEER $i+-/ cnno! d#n/ (# did i!.I* (i$ 'or1$ do no! 'or100(# i$ d+n#d.
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A design engineer’s responsibility shouldinclude assuring the structural safety of thedesign, details, checking shop drawing.
Detailing is as important as design sinceproper detailing of engineering designs is anessential link in the planning and engineeringprocess as some of the most devastingcollapses in history have been caused bydefective connections or DETAII!". Thereare many e#amples e#plained in the book$DE%I"! A!D &'!%T()&TI'! *AI)(E% byDov +aminetky.
Detailing is very important not only for theproper e#ecution of the structures but for thesafety of the structures.
Detailing is necessary not only for the steelstructures but also for the (&& members as itis the translation of all the mathematicale#pression’s and e-uation’s results.
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For the RCC members for most commonly used for buildings wecan divide the detailing for
1. SLABS!"#$ %R !"#$% %'()")*S.+R(C#A)*&LAR,C"RC&LAR,)%)R(C#A)*&LAR'-RA"/SLAB,#R"A)*&LAR (#C0
BALC%)- SLAB,L%F# SLAB,C%R)(R SLAB etc
. B(AS !"#$ %R !"#$% %'()"*S.+S$ALL%! 2 /((' B(AS0
3. C%L&)S.+R(C#A)*&LAR,LS$A'(,#S$A'(,C"RC&LAR,%C#A*%)AL,CR%SS S$A'( etc0
4. F%&)/A#"%)S.
/etailing for gravity loads is di5erent from the lateral loadss6ecially for the S("S"C F%RC(S.
A6art from the detailing for the above there is a di5erentdetailing re7uired for the Rehabilitation and strengthening ofdamaged structures.
!e will now dwell on the /(#A"L")* %F (B(RS F%R #$(*RA8"#- A)/ S%( C%/AL /(#A"L")*S AS '(R "S C%/( "S 139:A)/ "S 43; AS R(
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DO4S 5 DONOT4S FOR DETAILING
DO’S-GENERAL
6. Pr#r# dr'in$ ro#r-/ 5 cc2r!#-/ i* o$$i%-# -%#- #c( %r
nd $(o' i!$ $(# *or c-ri!/.
678
I 98di:678c;c
Cro$$ $#c!ion o* r#!inin '-- '(ic( co--$#d i++#di!#-/ *!#r -cin o* $oi-
%c1*i-- %#c2$# 98 r!(#r !(n 6
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7. Pr#r# %r. Indic!# ro#r cor
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. Con#$!ion o* %r$ $(o2-d %# &oid#d ! oin!$ '(#r#
+#+%#r$ in!#r$#c! nd +1# c#r!in !(! -- r#in. Cn %#
ro#r-/ -c#d.
6. In !(# c$# o* %2nd-#d %r$, -#d $-ic# o* %2nd-#d %r$$(-- %# +d# %/ $-icin on# %r ! !i+# $2c(
indi&id2- $-ic#$ 'i!(in !(# %2nd-# $(-- %# $!#r#d.
66. M1# $2r# !(! (oo1#d nd %#n! 2 %r$ cn %# -c#d
nd ( d#2!# concr#!# ro!#c!ion.
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12. Indicte "" e#$nsi%n, c%nstructi%n nd c%ntrcti%n &%ints
%n $"ns nd $r%'ide deti"s %r suc) &%ints.
1*. +)e "%cti%n % c%nstructi%n &%ints s)"" e t t)e $%int %
iniu s)er $$r%#ite" t id %r ner t)e id $%ints.
It s)"" e %red 'ertic"" nd n%t in s"%$ed nner.
DO’S / BEAMS 0 SLABS
1. )ere s$"ices re $r%'ided in rs, t)e s)"" e , s r s
$%ssi"e, 3 r% t)e secti%ns % #iu stresses nd
s)"" e stggered.
2. ere t)e de$t) % es e#ceeds 456 in cse % es3it)%ut t%rsi%n nd 756 3it) t%rsi%n $r%'ide ce rein.
s $er IS758-2666.
*. De"ecti%n in s"s9es e reduced $r%'iding
c%$ressi%n rein%rceent.
7. On" c"%sed stirru$s s)"" e used %r trns'erse rein. F%reers su&ected t% t%rsi%n nd %r eers "i:e" t% e
su&ected t% re'ers" % stresses s in Seisic %rces.
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@. To cco++od!# %o!!o+ %r$, i! i$ ood rc!ic# !o +1#$#condr/ %#+$ $(--o'#r !(n +in %#+$, ! -#$! %/@++.
Do4$ COL"MNS.6. A r#in*orc#d co-2+n $(-- ( ! -#$! $i %r$ o*
-oni!2din- r#in*orc#+#n! *or 2$in in !rn$r$# (#-ic-r#in*orc#+#n!.
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>. Br$ -r#r !(n >++ di. S(-- no! %# %2nd-#d.
=. L $-ic#$ $(-- %# no! %# 2$#d *or %r$ -r#r !(n
>++ di. Ec#! '(#r# '#-d#d.
@. W(#r# do'#-$ r# ro&id#d, !(#ir di+#!#r $(-- no!#c##d !(# di+#!#r o* !(# co-2+n %r$ %/ +or# !(n
>++.
. W(#r# %#n! 2 %r$ r# ro&id#d, !(#ir con!ri%2!ion
!o'rd$ $(#r r#$i$!nc# $(-- no! %# +or# !(n @K o*
!(# !o!- $(#r !o %# r#$i$!#d. "SE OF SINGEL BENT "PBARSCRANED) ARE NOT ALLOWED IN THE CASE
OF EARTH"AE RESISTANCE STR"CT"RES.
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DETAILING OF SLABS WITHO"T ANY C"T
OR OPENINGS.
T(# %2i-din -n D $(o'$ !(#$-%$ in di**#r#n! -#-$ *or !(#
2ro$# o* #-i+in!in !(# in*-o' o*
rin'!#r in!o !(# roo+ *ro+ !(# o#n!#rrc# nd -$o !(# $2n1#n $-% *or
!oi-#! in *ir$! *-oor.
T(# %2i-din -n D i$ on# in'(ic( !(# c-i#n! $1#d !(# rc(i!#c! !o
ro&id# o#nin -- ro2nd.R#*#r !(# >d
#-#&!ion
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Di**#r#n! $(#$ o* $-%$ 2$#d in !(#
%2i-din$. 8d#r#$$ion *or OT 58 *or $2n1#n $-%$.
Por!ico $-% in #-#&!ion
64
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Mini+2+ nd +.r#in*orc#+#n! K in %#+$, $-%$ nd
co-2+n$ $ #r cod- ro&i$ion$ $(o2-d %# *o--o'#d.
SLABS
I! i$ %#!!#r !o ro&id# + $cin o* 7++8) *or +in
%r$ nd 7@++68) in ord#r !o con!ro- !(# crc1 'id!( nd
$cin.
A +in. o* .7=K $(-- %# 2$#d *or !(# roo* $-%$ $inc# i! i$
$2%3#c!#d !o (i(#r !#+#r!2r#. ri!ion$ !(n !(# *-oor
$-%$. T(i$ i$ r#2ir#d !o !1# cr# o* !#+. di**#r#nc#$.
I! i$ d&i$%-# !o no! !o 2$# ++ %r$ $ +in %r$ $ !(i$
$i# &i-%-# in !(# -oc- +r1#! i$ o* in*#rior no! on-/ 'i!(
r#$#c! !o $i# %2! -$o !(# 2-i!/ $inc# -i1# TATA nd SAIL
r# no! rod2cin !(i$ $i# o* %r.
BEAMS
A +in. o* .7K i$ !o %# ro&id#d *or !(# co+r#$$ion %r$ in
ord#r !o !1# cr# o* !(# d#*-#c!ion.
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T(# $!irr2$ $(-- %# +in.$i# o*
++ in !(# c$# o* -!#r- -od
r#$i$!nc# .T(# (oo1$ $(-- %# %#n! !o 6>@
d#r## .
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Ld;7Ld;7
Ld
crc1
INCORRECT
CORRECT
CLOSE
STIRR"PS
Ld!
Ld!;7
CANTILEER BEAM
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NON ;RISMA+IC BEAM
Ld;7 Ld;7Ld
INCORRECT
CORRECT
CLOSE
STIRR"PS
crc1
Ld!;7
Ld!
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GRID BEAMGRID BEAM
INCORRECT
6.@d6.@d6.@d
C-o$# rin$
Hn#r %r$
S-o# 66
7#!r %r$
>>
d
CORRECT
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D#!i-$ o* Min 5 S#condr/ %#+$
INCORRECT
6.@d6.@d6.@d
C-o$# rin$
Hn#r %r$
>>
d
CORRECT
S#condr/ %#+
Min %#+
S#condr/ %#+
d#r##
Min %#+
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d
6;=OR
6;@ SPAN
6.@d
CORRECT
INCORRECT
d;7Qd;7Co!!)
!!
Ld
d;7
d;7
Ld
LINE OF CRAC
BEAM
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Con!in2o2$ %#+
con!in2o2$ %#+Sn;=
Sn;=Sn;=
Sn;=
incorr#c!
Sn;=
Sn;=
6.@d6.@d
Sn;=
corr#c!
6.@d
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6K
L6
6K CRACCRAC
.L7.L6 L7
SPAN;= SPAN;=
CON+IN
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D
D
CRAC
INCORRECT
NON;RISMA+IC
SEC+ION OF BEAM
D
D
DCORRECT
D
CLOSE RING
CLOSE RING
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COL"MN
INCORRECT
CAN+ILE=ER BEAM ;RO>EC+ING
FROM COL
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CRAC
SLO;ING BEAM
CORRECT
Ld
Ld
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CRACCRAC
INCORRECT
?A
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S+RESSES A+ CORNERS
C
C
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S?EAR AND +ORSION REIN. IN
BEAMS
INCORRECT
Min .7K%d !o con!ro- d#*-#c!ion $
'#-- $ *or $#i$+ic r#2.
%
D6 !o
7++
d
D
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CAN+ILE=ER BEAM I+?
;OIN+ LOAD
CORRECT
INCORRECT
7;>dd
S(#r r#in.
E!r !i#$
Ld
Ld
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o#nin
CORRECT
OPENING IN WEB OF BEAM
crc1crc1
o#nin
INCORRECT
OPENING IN WEB OF BEAM
Ld
d;7 d;7
C-o$#d $!$
*or d;7C-o$#d $!$
*or d;7
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BEAM COL
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CORRECT
S;LICE DE+AIL FOR COL
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REDNO.CLOSE TIES
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+ERMINA+ION OF COL
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BEAM COL. J"NCTIONN-E@+ERIOR
CORRECT
BEAM COL. J"NCTION
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COL
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E-REGION-CON+IN AUL6;>
7d
@+++
S!irr2 $cinUd;= or
6++ or di '(ic(
#r i$ !(# -#$!
7d7d 7d$!:+d;7 $!:+d;7
CORRECT
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INCORRECT
FOO+ING-DE+AILS(INDE;ENDEN+
CORRECT
COER TO
STARTER
STARTER
BARS
COL"MN
BARS
NAT"RAL
G.L
Ld!
L%>8 SIDE COER
Ld!COER@++
IF .c.c %#-o'
or @++
Min.>
+;ICAL REIN DE+AILS OF
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+;ICAL REIN DE+AILS OF
?AMMER FO
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SEC+ION OF +RENC?
CRAC
INCORRECTINCORRECT
CORRECT
LdLd
Ld
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S+AIRCASE-I+? AIS+ SLAB
INCORRECT
CORRECT
Ld+in)E!r %r
Ld+in)
Ld+in)
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Min %r
Di$!.
Min %r
A-!#rn!# 6
SLABLESS S+AIRCASE
S SS S C S
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Min %r
A-!#rn!# 7
AU.7@L
LU(orion!- $n
SLABLESS S+AIRCASE
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DE=ELO;MEN+ LENG+? OF BARS
SLNO BARDIA. TENSION++ COMPRESSION REMARS
6 >. >6.
7 6 =. >.
> 67 @=. =@6.
= 6 @7. 7.
@ 7 =. @7.
77 6>=. 7.
7@ 66@. =.
7 6>6. 6@>.
>7 6@=. 67>.
FOR A CONCRE+E GRADE M26 0S+EEL S+RENG+? F715
APPROIMATELY "SE @di FOR TENSION
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CONCL
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REFERENCES
6. HANDBOO ON CONCRETE REINFORCEMENT ANDDETAILING=S5T)
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. IS7@7 CODE OF PRACTICE FOR BENDING AND
FIING OF BARS FOR CONCRETE REINFORCEMENT.
. IS6>7.
6. IS=>7.66. IS=@7
67. REINFORCED HAND BOO BY REYNOLD.
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THAN YO".
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