ICC Commercial Building Inspector Practice Test

What is the minimum required thickness for natural stone used in construction as a weather covering?

1. 1.5 inches

2. 2 inches

3. 2.5 inches

4. 3 inches

The correct answer is: 2 inches

The minimum required thickness for natural stone used in construction as a weather covering is specified to be 2 inches to ensure adequate durability, performance, and structural integrity. This thickness helps to prevent issues like cracking or erosion due to weather conditions, which could otherwise compromise the effectiveness of the weather covering. In construction, using stones that meet minimum thickness standards is essential for load-bearing capabilities and long-term performance. A thickness of 2 inches provides a balance between practical handling and sufficient mass to resist environmental factors, while being thick enough to support the weight without significant risk of damage over time. Choosing a thickness less than 2 inches may lead to weaknesses in resistance to physical stress from elements like wind, rain, and frost, which can lead to deterioration of the stone and the underlying structure. Hence, 2 inches is established as the benchmark for achieving optimal performance in natural stone applications as weather coverings.