What is the sole purpose for installing welded wire mesh in a concrete slab?

What is the sole purpose for installing welded wire mesh in a concrete slab?

• A. To prevent adjacent slabs from separating
• B. To prevent cracks
• C. To improve tensile strength
• D. To provide load transfer across a joint

Answer: (B)

Welded wire mesh is primarily installed in a concrete slab to help prevent cracks. Concrete is strong in compression but relatively weak in tension, making it susceptible to cracking, especially as it cures and shrinks. The welded wire mesh acts as a reinforcing element throughout the slab, providing support that helps resist the tensile stresses that can lead to cracking over time. While other options suggest roles for welded wire mesh in concrete slabs, they either involve secondary benefits or relate to different techniques and materials. For example, preventing adjacent slabs from separating pertains more to joint design or control joints rather than reinforcing the slab itself. Improving tensile strength is indirectly related, but the immediate and most critical purpose of welded wire mesh is to address cracking directly. Load transfer across a joint is typically associated with specific joint design elements rather than reinforcement mesh, which mainly functions within the slab itself. Therefore, the primary reason for installing welded wire mesh focuses on minimizing cracking in the concrete slab.

Welded wire mesh is primarily installed in a concrete slab to help prevent cracks. Concrete is strong in compression but relatively weak in tension, making it susceptible to cracking, especially as it cures and shrinks. The welded wire mesh acts as a reinforcing element throughout the slab, providing support that helps resist the tensile stresses that can lead to cracking over time.

While other options suggest roles for welded wire mesh in concrete slabs, they either involve secondary benefits or relate to different techniques and materials. For example, preventing adjacent slabs from separating pertains more to joint design or control joints rather than reinforcing the slab itself. Improving tensile strength is indirectly related, but the immediate and most critical purpose of welded wire mesh is to address cracking directly. Load transfer across a joint is typically associated with specific joint design elements rather than reinforcement mesh, which mainly functions within the slab itself. Therefore, the primary reason for installing welded wire mesh focuses on minimizing cracking in the concrete slab.