Retaining walls are stable rigid structures used to absorb the forces of sloping ground or stored dry bulk materials. Goods can be stored at different levels on either side of the wall. You can use precast concrete blocks to build gravity walls to hold earth, soil or bulk goods, or to create soil retention solutions. Precast concrete products can be easily stacked and dismantled if necessary. Blocks allow you to build a wall that meets your needs, even if those needs change.