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ERRATA TO IRC:24-2010

Errata No. 1/ IRC:24-2010/January 2014To

IRC:24-2010 “Standard Specifications and Code of Practice for Road Bridges”Section V

Steel Road Bridges (Limit State Method) (Third Revision)

Sl. No. Clause No. & Page No.

For Read

1. Cl.501.5 Symbols(Page 11)

Cmy, Cmz Moment amplification factor about respective axes

Delete

2. Cl.503.1.2(c) Lines 4&5(Page 28)

…. appropriate choice of one or more the following: …..

Insert ‘of’ between ‘more’ and ‘the’

3. Cl.503.2.2 Line 2(Page 29)

…. The limits states are classified as: …..

Replace ‘limits states’ by ‘limit states’

4. Cl.503.5.2 Line 2(Page 31)

…. the partial safety factor for loads (f) shall be…..

Replace ‘(f)’ by ‘(γf)’

5. Table 2 Column 2Against ‘Stem of a

T-Section etc’(Page 33)

‘D/tf’ Replace by ‘d/t’

6. Table 2 Column 2Against ‘Circular hollow tube etc.’

(Page 33)

‘D/tf’ Replace by ‘D/t’

7. Fig. 1 Figure for ‘ROLLED CHANNELS’

(Page 35)

‘h’ Replace by ‘d’

8. Cl. 506.1.2.3 Line 6

(Page 41)

“fuγmo/fyγml” Replace by “0.9fuγmo/fyγml

9. Fig. 5(Page 50)

Existing figure does not show the title of the abscissa

Insert λ as the title of the abscissa (X-axis)

10. Cl.507.5.1.2 Line 7

(Page 63)λvv =

l rvv/

/

( )

ε π ε2 250 and

λφ =b b t1 2

2

2

250

+( )/

/ε π ε

λvv =

lr

Evv

⎛

⎝⎜

⎞

⎠⎟

επ2

250

and

λφ = b b t

E1 2

2

2

250

+( )/

επ

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ERRATA TO IRC:24-2010

Sl. No. Clause No. & Page No.

For Read

11. Cl.509.2.1.1 Line 3

(Page 78)

d/tw ≤ 67ε Replace by d/tw > 67ε

12. Table 11(Page 84)

KL/r Replace by LLT/ry,h/tf Replace by hf / tf

13. Table 13 Last row,First Column:Free

(Page 88)

Existing ‘figure’ shows top flange gusset

Delete top flange gusset from the ‘figure’

14. Cl.509.4.2.1(Page 92)

ε and fy Replace by εw and fyw respectively wherever appearing

15. Cl.509.4.2.2(b) Line 12

(Page 93)

τb = buckling strength……. Clause 509.4.2.2(a)

Delete the Line

16. Cl.509.4.2.2 (b)Line 18

(Page 94)

= d cos φ + (c-sc-st) sin φ Replace by = d cos φ - (c-sc-st) sin φ

17. Cl.509.6.1.1(a)(Page 97)

‘ε’ Replace by ‘εw’ wherever appearing.

18. Cl.509.6.1.1(b)(iii)(Page 98)

c < d Replace by c < 0.74d

19. Cl.509.6.1.1(d)(Page 98)

εw = 250 / f ywAdd “ = yield stress ratio of web”.

20. Cl.509.6.1.2(b)(Page 99)

εf = 250 / f yfAdd “= yield stress ratio of flange”

21. Cl.510.3.1.2(c)(Page 113)

for n ≤ 0.2 Mndy = Mdy

for n > 0.2 Mndy = 1.56 Mdy

(1 – n) (n + 0.6)Mndz = 1.11 Mdz (1 – n) ≤ Mdz

Mndz = 1.11 Mdz (1-n) ≤Mdz

For n ≤ 0.2, Mndy = Mdy

For n > 0.2, Mndy = 1.56 Mdy (1-n) (n+0.6)’

22. Table 15(Page 116)

Table 15 Replace existing Table 15 by revised Table 15 shown separately

23. Cl.511.6 Line 1(Page 129)

No fatigue assessment is necessary if any of the following conditions are satisfied

Replace by :No fatique assessment is required if the following conditions are satisfied.

24. Cl.512.6.4 Line 8(Page 149)

‘0.9 fub An ≤ fyb Asb(ϒmf/ϒm)’ Replace by ‘0.9 fub An ≤ fybAsb(ϒmf /ϒm0)’

25. Cl.C1.2 Line 3(Page 177)

‘(LLT)’ Replace by ‘(LLT)2’

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ERRATA TO IRC:24-2010

Sl. No. Clause No. & Page No.

For Read

26. Cl. C1.2 Line 19(Page 177)

(z2 - y2) Replace by (z2 + y2)

27. Table C.1(Page 178)

Existing Table incomplete Replace by complete Table shown separately

28. Table C1(contd..) : Constants(Page 179)

Under c2 : Line 7 “1.257” Replace by “1.267”

Under c3 : Line 5 : “1.780” Replace by “1.730”Under c3 : Line 10 : “1.390” Replace by “1.890”

29. Cl. C1.2(Page 179)

“It = The torsion constant….” Replace by “It = St Venant’s torsion constant….”

30. Cl. G4.6.2 Definition of k2

Line 4(Page 222)

“…. Parallel to the axis of the girder…..”

Replace by:“……parallel to the yyaxix of the girder”

Table 15 Equivalent Uniform Moment Factor (Cl. 510.3.2.2)

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ERRATA TO IRC:24-2010

Table 15 Equivalent Uniform Moment Factor (Cl. 510.3.2.2)