A type of Prestressing in which reinforcing tendons are fed through tubes which are covered by concrete poured into the form. Once the concrete cures and the forms are removed, the tendon is clamped on one end and jacked tighter on the other until the required tension is achieved. This produces a reinforced concrete beam with a postive camber which is able to withstand greater loads without deflection as compared to unreinforced beams of similar dimensions. Compare to pretension.