एक समलंबाकार संयुक्त फुटिंग (trapezoidal combined footing) का उपयोग मुख्य रूप से किस लिए किया जाता है?

Which of the following is categorized as a long-term loss of prestress in a prestressed concrete member?

As per IS 456:2000, in the limit state design of a flexural member, the strain in the reinforcing bars under tension at the ultimate state should not be less than ______ (where fy is the characteristic strength of steel and Es is the modulus of elasticity of steel).