What is Welded Wire Fabric primarily used for in slabs?

• A. To anchor steel columns
• B. To replace rebar in tension zones
• C. To reinforce concrete only in vertical elements
• D. As a distributed reinforcement grid to control cracking and provide shear transfer

Answer: (D)

Welded Wire Fabric in slabs serves as a distributed reinforcement grid that helps control crack widths and transfer shear across the slab. By creating a uniform network of steel across the concrete, it distributes tensile stresses from cracking due to shrinkage, temperature changes, and minor loads, keeping cracks narrow and the slab more durable. It supports the overall performance of the slab but isn’t intended to replace proper rebar in tension zones or to anchor columns. Its role is focused on crack control and aiding shear transfer through the slab, rather than providing primary flexural strength alone.