Bolster

In construction, bolsters are specialized supports used to hold and position reinforcing steel (rebar) accurately within concrete slabs, ensuring proper coverage and embedding for optimal structural integrity. They also serve as side form spacers in vertical formwork and provide support for post-tension cables or reinforcement mesh. Made from durable materials like steel or plastic, bolsters play a crucial role in maintaining correct reinforcement placement, which is vital for the strength and longevity of concrete structures.