This paper provides an overview of reliability of the member stability criteria in the 2008 Iranian Structural Steel Specification. Steel building structures in the Iran have been designed from many years ago, but this is the first time that the LRFD methods have been developed and presented in this code. Development of LRFD design methodology involves consideration of safety factors to account uncertainty in loading, geometrical properties, modeling, analysis, material characteristics, etc. Management and control of risk due to uncertainties through proper design is a major engineering goal. The design codes and standards address uncertainties through safety factors that may be defined either implicitly such as those used for the allowable strength design (ASD) format or explicitly such as those used for the Load and Resistance Factor Design (LRFD) format. The purpose of this paper is to review the national reliability indices of the Iranian specification, using new information about material properties, and new evaluation of the relevant experiments. The paper will examine the reliability of beam, girders and column in some different load combination.