 Cantilever walls resist lateral pressures by friction at the base of the wall and/or "passive earth pressure", the tendency of the soil to resist lateral movement.Basements are a form of cantilever walls, but the forces on the basement walls are greater than on conventional walls because the basement wall is not free to move.Shoring of temporary excavations frequently requires a wall design that does not extend laterally beyond the wall, so shoring extends below the planned base of the excavation.