Reinforced concrete for collaborative work

There is a good bond between steel bars and concrete, and sometimes the surface of the steel bars is also processed into spaced ribs (called deformed steel bars) to improve the mechanical interlocking between concrete and steel bars. Prestressed concrete is used to compensate for the phenomenon of premature cracking in concrete. Before the use (loading) of the component, a pre pressure is applied to the concrete, that is, in the tensile zone of the concrete, the steel bars are tensioned by manual force, and the shrinkage force of the steel bars is used to pre compress the tensile zone of the concrete.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.