Question

While designing, for a steel column of Fe250 grade, a base plate resting on a concrete pedestal of M20 grade, the bearing strength of concrete (in N/mm²) in limit state method of design as per IS : 456 - 2000 is __________

Answer 1

Concept

As per IS 456: 2000, the bearing strength of concrete (f_br) is given by:

 f_br = 0.45 f_ck (For limit state)

Calculation

 Given, 

 Grade of concrete M20 i.e. f_ck = 20 MPa  

 ∴ f_br = 0.45 × 20 = 9 MPa