Precast concrete bridge segments are modular components used to construct bridges, offering speed, efficiency, and quality control in construction. They are typically prestressed to handle structural loads and are often cured using atmospheric steam, similar to concrete sleepers and hollow core slabs, to achieve early strength.. Steam Engineering provides the perfect solution for curing large precast infrastructure projects. AASHTO Girders, Bulb-T beams, T-beams, Box girders, I-beams.