What is the minimum specified compressive strength for most residential concrete flatwork?

The minimum specified compressive strength for most residential concrete flatwork is typically set at 3,000 psi. This strength offers a good balance between performance and workability for a variety of residential applications such as driveways, sidewalks, and patios. It ensures that the concrete can withstand everyday loads, resist cracking, and maintain structural integrity over time, taking into account typical stressors like weather fluctuations, vehicle traffic, and general wear and tear.

Choosing a strength lower than 3,000 psi might compromise the durability and longevity of the concrete, possibly leading to early failure under regular conditions. While higher strengths may be suitable for specific applications, 3,000 psi is generally the minimum recommended for most residential flatwork to achieve a satisfactory performance level.