Use this option to define additional code parameters for steel members. Access the parameters by clicking the More button located in the Member Definition - Parameters dialog. 
The following parameters are defined:
- Calculation type: linear (the elastic section is selected using the elastic section modulus for bending W) and nonlinear (the plastic section is selected using the plastic section modulus for bending W), 
 
-  Structural bracing, 
 
-  Section parameters - Anet/Agross Ratio which applies to a tensile force acting on the cable. It is a coefficient that defines the relationship of the member cross-section area, not considering the bolt or rivet openings (Anet), to the total cross-section area (Agross), 
 
-  Fytot and Fztot parameters, 
 
-  Round pipes case conditions. If the Unidirectional bending of pipes option is selected, then, for this type of section, a bending moment equal to a sum of moments operating along axis Y and Z is calculated; the resultant moment is the basis for bar design.