What does the bar support abbreviation SB mean?

The abbreviation SB stands for "Slab Bolster." In construction, slab bolsters are critical components used to support and position rebar in concrete slabs. They help ensure that the rebar is adequately spaced and positioned appropriately within the formwork before the concrete is poured. This positioning is crucial for maintaining structural integrity and ensuring the concrete cures properly around the reinforcing bars.

Slab bolsters are typically plastic or metal devices that lift the rebar above the ground or the bottom of the form, allowing for the correct concrete cover, which enhances the durability and performance of concrete structures. Understanding this terminology is vital for anyone involved in concrete work, as it relates directly to the reinforcement and overall quality of concrete installations.