Beam Systems

    Precast concrete construction system has its own characteristics which influence the layout, span length, construction depth, stability system, etc. to a greater or less extend.

Theoretically, all joints between the precast concrete units can be made in such a way that the completed precast structure has the same monolithic concept as cast-in-situ structures.

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         Although pre-stressed concrete was patented by a San Francisco engineer in 1886, it did not emerge as an accepted building material until a half-century later. The shortage of steel in Europe after World War II coupled with technological advancements in high-strength concrete and steel made pre-stressed concrete the building material of choice during European post-war reconstruction. North America's first pre-stressed concrete structure, the Walnut Lane Memorial Bridge in Philadelphia, Pennsylvania, however, was not completed until 1951.

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