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Pre-stressed reinforced concrete structure(tipically its a beam or a slab). Its a type of reinforced concrete elements that contain pre-stressed steel reinforcement at designed places of structural elements. This technics engineers tipically use when it is required to reduce deflection of beams,slabs or lintels. This type of structural elements can be produced at concrete structures factories where they have all equipment in order to pre-strain reinforcement(steel bars) before concrete placement.
