Bar Chairs & Spacers

Getting the right amount of concrete cover is essential for the durability of reinforced concrete structures. 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 main categories of rebar spacers are:

  • Point Spacers (wheel spacers, various tower or chair-like shapes)
  • Linear Spacers (Π-section profiles, H-section profiles, or other 3 dimensional shapes),

Actech offers a wide range of spacers which you can select from based on your specific project requirements. Actech’s rebar spacers can be divided in three raw materials categories:

  1. Concrete spacers
  2. Plastic spacers
  3. Metal spacers

The concrete spacers have the advantage of the same raw material which will improve the water tightness and strength of the concrete. Plastic spacers have the advantage of being low-cost and light weight.

We at Actech take pride that we constantly deliver the best products and to ensure that this reputation is maintained we assure you that our spacers comply with the Australian Standards. Technical Data Sheets and Compliance Certificates are available on request.

Function of Rebar Spacers

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.