amendment no 1 to IRC 112 - 2014.pdf



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INDIAN HIGHWAYS, FEBRUARY 2014 107 I R C AMENDMENT TO IRC:112-2011 Amendment No 1/ IRC:112-2011 / January 2014 To IRC:112-2011 “Code of Practice for Concrete Road Bridges” S No Clause No & Page No For Read 1 322 (Page 12) f pk characteristic tensile strength of prestressing steel f pk characteristic tensile strength of prestressing steel which is same as f p corresponding to breaking load given in the relevant IS codes listed in Table 182 2 622 Note:
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   INDIAN HIGHWAYS, FEBRUARY 2014 107    I   R   C AMENDMENT TO IRC:112-2011Amendment No 1/ IRC:112-2011 / January 2014 To IRC:112-2011 “Code of Practice for Concrete Road Bridges”S NoClause No Page NoFor Read 1322 (Page 12)  f   pk   characteristic tensile strength of  prestressing steel  f   pk   characteristic tensile strength of  prestressing steel which is same as  f   p  corresponding to breaking load given in the relevant IS codes listed in Table 182 2622 Note: (2) Fig62(Page 30)Value of ε uk   shall be taken from the standard governing the manufacture of reinforcementValue of ε uk   shall be taken as the uniform elongation given in the standard governing the manufacture of reinforcement31044(Page 103)The design punching shear resistance (MPa) of slab may be calculated as follows:The design punching shear resistance shall  be assessed at the basic control perimeter, according to Clause 1042 The design  punching shear resistance (MPa) of slab may  be calculated as follows:415312(Page 163)The minimum cover for post tensioned ducts shall not be less than maximum of the outer diameter of ducts or 75 mm(local reduction in spacing at externally jointed locations of ducts is acceptable)The minimum cover for post tensioned ducts shall not be less than 75 mm Local reduction in cover at externally jointed locations of ducts is acceptable5169 (1)(Page 186)Deep beams can be designed using appropriate elastic models or by plastic methodsDeep beams (span/depth ratio less than 3) can be designed using appropriate elastic models or by plastic methods   108 INDIAN HIGHWAYS, FEBRUARY 2014    I   R   C ERRATA TO IRC:112-2011Errata No 1/IRC:112-2011/January 2014 To IRC112-2011 “Code of Practice for Concrete Road Bridges”S NoClause No Page NoFor Read 11034(Page 95) V   Edi  ≤ V   Rdi V   Edi  is the interface shear stress V   Rdi  is the resisting capacity at section V   Edi  = β V   Ed    /  zb i v Edi  ≤ v Rdi v Edi  is the interface shear stress v Rdi  is the resisting capacity at section v Edi  = β v Ed /zb i 2135(Page 136)Requirements given in this Clause are in addition to those given in Clause 1611Requirements given in this Clause are in addition to those given in Clause 1614315261 (4)(Page 159)When large bars are used, adequate crack control shall be ensured either by using surface reinforcement as per Clause 16242, or by calculation as per Section 12When large bars are used, adequate crack control shall be ensured either by using surface reinforcement as per Clause 1654 (4), or by calculation as per Section 1241511(Page 166)  f  ctd   ( t  ) is the design tensile strength at time of release ‘t’ (Refer Clause 6433) taken as 07  f  tm  (t)/γ c  f  ctd   ( t  ) is the design tensile strength at time of release ‘ t  ’ (Refer Clause 6423) taken as 07  f  ctm  (t)/γ c 51671 (3) (Page 185)1671 (4) (Page 185)1671 (4) (Page 185) Eq 1612  a c  < 05 h c  In corbels with a c  > h c  A sstirrup  ≥ 05  f  cd   /f   yd    a c  ≤ 05 h c  In corbels with a c  > 05 h c  A sstirrup  ≥ 05 F   Ed  /f   yd  6Annexure A2 Clause A29 Figure A2-4 (Page 243)1 Fig A2-4 Rectangular Tensile Strength2 nf  cd  1 Fig A2-4 Rectangular Stress Distribution2 η fcd 7Clause 1671 (Page 186)Figure shown belowCorrected Figure shown below   INDIAN HIGHWAYS, FEBRUARY 2014 109    I   R   C ERRATA NO 1/IRC:112-2011/JANUARY 2014As existing in the code Note :  Provide chamfer to avoid re-entrant corners in 167a) and 167 b)Fig 167 Reinforcement of a Corbel As Amended: Note :  Provide chamfer to avoid re-entrant corners in 167a), 167 b) and 167 c)Fig 167 Reinforcement of a Corbel   a c a c a c