ABSTRACT
Material properties are important in calibration of new generation design codes. The statistical parameters of strength of material often govern in establishing the acceptable safety margin. This paper provides a summary of the available statistical parameters for structural steel produced in the United States including ASTM A709 and ASTM A992, with nominal yield strength 50 ksi (345 MPa) and 70 ksi (483 MPa). The review of cumulative distribution functions (CDF) confirms that the bias factor (ration of mean to nominal) is larger than 1.10 and coefficient of variation for the lower tail of the CDF is less than 0.05.
