General Contractor Practice Exam

What is the minimum compressive strength for concrete within a pipe of steel core?

1. 3000 PSI

2. 4000 PSI

3. 5000 PSI

4. 6000 PSI

The correct answer is: 4000 PSI

The minimum compressive strength for concrete within a steel core pipe is critical for ensuring the structural integrity and durability of the concrete during its lifespan. A compressive strength of 4000 PSI is widely accepted as a standard minimum for many applications, including those involving steel core pipes. This level of strength provides sufficient load-bearing capacity, resistance to cracking, and overall performance under various conditions, such as pressure and environmental factors. Higher compressive strength values, like 5000 PSI or 6000 PSI, while beneficial in certain situations, are not always necessary for every application, thus making 4000 PSI a common requirement in construction standards for steel core applications. This choice reflects a balance between performance and cost-effectiveness, ensuring that the concrete will meet the necessary engineering requirements while also being feasible for large-scale implementation.