Intersecting reinforcing bars must be tied with what gauge or heavier tie wire?

The correct answer, which specifies that intersecting reinforcing bars must be tied with a tie wire of 16 gauge or heavier, is based on industry standards for construction and reinforcement practices. A 16-gauge or heavier wire provides adequate strength and durability to ensure secure connections between the bars, which is essential for structural integrity in concrete applications.

Using the appropriate gauge for tying reinforcing bars is crucial as it affects not only the ease of handling during installation but also the overall stability of the reinforcement once the concrete is poured. A heavier gauge wire offers better tensile strength, making it more effective in holding the rebar in place, especially under stress or load conditions. This ensures that the reinforcement performs as intended within the concrete structure.

In construction practices, especially concerning safety and the longevity of the structure, selecting the correct gauge of tie wire is paramount, thus emphasizing why 16-gauge wire or heavier is the required choice for tying intersecting reinforcing bars.