Spacers made of plastics belong to one of the most popular groups of spacers used in reinforced concrete structures. Owing to use of plastics, the spacers are fully resistant to humidity and other chemical substances. One of the main advantages of the spacers is that reinforcement can be distributed accurately in reinforced concrete elements, which has favourable influence on the strength of the entire structures both in vertical and horizontal plane.
We can distinguish among several types of spacers: