“Even though other limit states like limit state of vibration can be specified and are applicable to special structures such as bridges, the two conditions above are generally accepted as very important conditions to be satisfied by every structure under service loads. Codes also specify the partial safety factors for load combinations under which these are to be checked. According to IS 456, Table 18 (Table 2.1 of the text), the combinations of loads for serviceability conditions should be the largest of the following:”