Concrete that is cast into forms and cured at a location other than its final position in a structure. Products that are commonly fabricated in this manner include beams and joists, slab units, wall panels, and utility items such as pipe sections and access holes for workers. Cast stone that is made to simulate cut and dressed stone is a form of precast. Concrete block is also sometimes considered a form of precast. Precast concrete can be unreinforced or reinforced, and prestressed by the pretensioning or posttensioning method. Precast concrete is used with cast-in-place, structural steel, or load-bearing masonry construction. Field connections are more critical for precast than for monolithic cast-in-place concrete, because the connections must provide structural continuity and load transfer between elements.