What is the minimum concrete strength (in Mpa) specified for exterior applications such as carports?

The minimum concrete strength specified for exterior applications, such as carports, is typically 32 Mpa. This higher strength rating is essential in such applications because exterior concrete must endure various stresses, including loads from vehicles, environmental factors like freeze-thaw cycles, and water exposure.

Concrete with a strength of 32 Mpa provides enhanced durability and ensures that the structure can withstand these conditions over time. It also minimizes the risk of cracking and other structural failures that can occur with lower strength concrete, making it important for safety and longevity.

In contrast, lower strength ratings such as 15 Mpa, 20 Mpa, or 30 Mpa may not meet the necessary requirements for load-bearing and durability in outdoor settings, potentially leading to early degradation and insufficient performance in real-world conditions. Thus, utilizing 32 Mpa concrete is crucial for achieving a long-lasting and robust exterior application.