Specification of root roughnesses via

The following options for the roughness are available:

• R_aF (calculate R_zF)
  For procedures where R_aF is used, this value is transferred directly. For procedures that require R_zF, this value is determined according to the following equation:
  R_zF = R_aF * 6
  
  
• R_zF (calculate R_aF)
  For procedures where R_zF is used, this value is transferred directly. For procedures that require R_aF, this value is determined according to the following equation:
  R_aF = R_zF / 6
  
  
• R_aF and R_zF
  Both values must be specified and are used in the respective calculation methods.
  
  

Which roughness value was used for the respective calculation can be taken from the calculation report.