Frew analyses flexible retaining structures such as sheet pile or diaphragm walls. The program calculates deformations and the stresses in the retaining structure through a number of construction stages from the initial installation of the wall through a series of activities such as variations of soil levels and water pressures, the insertion or removal of ground anchors and the application or removal of surcharges.

Stawal checks the stability of cantilever or propped retaining walls. The program determines the penetration required to prevent rotational instability of the wall. It also calculates the bending moments and shear forces occurring in the wall at the limiting condition and the strut force is calculated for propped walls.

Greta analyses the stability of a gravity retaining wall and determines the bending moments and shear forces in the stem, heel and toe of the retaining wall. It also calculates the resultant force on the base and the sliding resistance.