A rebar spacer is a device that secures the
reinforcing steelor "rebar" in reinforced concretestructures as the rebar is assembled in place prior to the final concrete pour. The spacers are left in place for the pour to keep the reinforcing in place, and become a permanent part of the structure.
The main categories of rebar spacers are:
*Linear Spacers (Π-section profiles,H-section profiles,or other 3 dimensional shapes),
*Point Spacers (wheel spacers,various tower or chair-like shapes)
The engineering study of every
concrete construction, whether it is a building, a bridge, a bearing wallor other structure, predicts the positioning of steel rebars at specific positions in the volume of concrete(predicted cover of steel reinforcement bars).This cover typically varies between 10mm and 100mm. The statics of every concrete construction are designed in such a way that steel and concrete properties are combined in order to achieve the maximum possible strength for the particular construction (e.g.anti- earthquakeprotection) as well as to prevent the long-term corrosionof steelthat would weaken the construction. Rebar spacers secure the correct position of steel,thus assisting in the practical application of the theoretical specifications of concrete construction.The cover of the steel of a particular construction element (for example in a concrete slabor a beam) should be generally uniform within the element.
The use of spacers is particularly important in areas with high earthquake activity in combination with corrosive environment(like proximity to
salt waterof sea), as for example Japan, Iran, Greece, Californiaetc.
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