MSEW(30) is an interactive program for the design and analysis of mechanically stabilized earth walls It follows the design guidelines of AASHTO98/Demo 82  AASHTO02/FHWA-NHI-00-043  AASHTO 2007-2010  or NCMA97/98 Note that AASHTO98/02 is based on allowable stress design (ASD) whereas AASHTO 2007-2010 is based on load resistance factor design (LRFD)