A rebar spacer is a device that secures the reinforcing steel or “rebar” in reinforced concrete structures 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 concrete spacers have the advantage of the same raw material which will improve the watertightness and strength of the concrete.

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The engineering study of every reinforced concrete construction, whether it is a building, a bridge, a bearing wall or other structure, predicts the positioning of steel rebars at specific positions in the volume of concrete (predicted concrete cover of steel reinforcement bars). This cover typically varies between 10 and 100 mm. 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-earthquake protection) as well as to prevent the long-term corrosion of steel that 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 slab or a beam) should be generally uniform within the element.

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