Supporting the reinforcement
Various types of bar-chairs are used to support the reinforcement. In turn, these provide the minimum amount of concrete edge cover.
![Photo of a round bar chair.](images/page_002a.jpg)
Slab on ground plastic bar chairs
This type of bar chair is used for reinforcing slabs that are:
- cast against the ground
- on plastic sheeting.
![Photo of a plastic bar chair.](images/page_002b.jpg)
Trench mesh support
This type of plastic bar chair is used in strip footings.