Question

In the case of a P.S.C. beam, to satisfy the Limit State of Serviceability in cracking, match List-I with List-II and select the correct answer using the codes given below the lists:

List - I
A. Class 1 structure
B. Class 2 structure
C. Class 3 structure
List- II
1. No visible cracking ${\sigma }_1<3N/m{m}^2$
2. Concrete section uncracked; crack width to be calculated to check
3. No cracking under service loads
$\text{Codes}:ABC$

• A. $123$
• B. $213$
• C. $312$
• D. $321$

Answer 1

The correct option is C $312$

IS1343: 1980 (clause 19.3.2) gives serviceability limit states.
Class 1 structures-no cracking under service loads
Class 2 structures-no visible cracking when $\sigma <3N/m{m}^2$
Class 3 structures -concrete section uncracked