Limit State Method of Rc structures

Limit state design has originated from ultimate or plastic design. The object of design based on the limit state concept is to achieve an achieve an achieve an acceptable probability that a structure will not become unserviceable in its life time for the use for which it is intended, that is ,it will not reach a limit state. A structure with appropriate degrees of reliability should be able to withstand safely all loads that are liable to act on it throughout its life and it should also satisfy the serviceability requirements.

In other words, all relevant limit states must be considered in design to ensure and adequate degree of safety and serviceability