Preload is the world's leader in prestressed concrete tank design and construction, having completed more than 3,700 tanks of ... various types, sizes and designs. With a tradition of excellence going back to 1930, all of Preload's resources have been devoted to designing and building wire-wound prestressed concrete tanks of the highest quality, durability and value. The Preload heritage of leadership continues today through the expertise and creativity of our people, who have over 1,500 years combined experience in the design and construction of storage, containment and treatment facilities. read more