What is spacers in construction?

Spacers are small pieces of plastic, metal or composite material placed between reinforcement bars in concrete structures to maintain the correct spacing and cover between the bars. They are mainly used in reinforced concrete structures like beams, columns, slabs, walls etc. to ensure that the bars are placed and held in the correct position as required by the design.

Spacers are also used to improve the mechanical properties of the reinforced concrete structure. They help ensure good concrete cover, which is important in preventing corrosion of the reinforcement. Spacing between reinforcing bars can be critical to the strength of the structure. Incorrect spacing can reduce the load capacity, durability and longevity of the structure.

There are a range of different types of spacers, shaped in different ways to provide different shapes and thicknesses, depending on the applications. They can be flat, conical, circular or cylindrical. They can also have different heights depending on the size of the reinforcing bar.

In summary, spacers play an essential role in reinforcing concrete structures. They enable the reinforcement to be securely fixed in place and to maintain proper covers and spacing for maximum durability and strength.