Cracking of reinforced concrete flexural members is a highly random phenome
non. In this paper reliability models are presented to determine the probab
ilities of failure of flexural members against the limit states of first cr
ack and maximum crackwidth. The models proposed take into account the mecha
nism of cracking. Based on the reliability models discussed, Eqs. (8) and (
9) useful in the reliability-based design of flexural members are presented
.