What is NOT included in the components of concrete that require special inspections?

The correct response identifies that screeding is not typically considered a component of concrete that requires special inspections. Special inspections are procedures established to ensure compliance with the building code and project specifications, particularly for components that significantly impact the structural integrity of the concrete.

Reinforcing steel and welding are critical elements in ensuring that the finished concrete has the necessary strength and stability to support structural loads. Their installation must be inspected to confirm that they meet the design specifications and codes.

Sampling concrete during its placement is vital for testing the quality and characteristics of the concrete mix. This process ensures that the concrete meets the specified strength, consistency, and other performance metrics.

The use of the required design mix is also crucial, as it helps ensure that the concrete mix used on site matches the specifications that were determined during the design phase. Any deviations from the required mix can lead to potentially serious issues in the structural performance of the concrete.

In contrast, while screeding is an important task in finishing the surface of freshly poured concrete to ensure proper drainage and appearance, it does not typically fall under the category of components that require the same level of inspection as reinforcing steel, welding, sampling during placement, and adherence to the design mix. Thus, it is not included in the list of components