Which material has the minimum thickness of .0216 inches as specified for roof assembly applications?

The specified minimum thickness of .0216 inches for roof assembly applications pertains specifically to cold-rolled copper. This material is commonly used for roofing due to its excellent durability, malleability, corrosion resistance, and aesthetic appeal. In roof assembly applications, a minimum thickness is crucial to ensure the longevity and structural integrity of the roofing system.

Cold-rolled copper is often preferred in architectural applications because it can withstand varying weather conditions while maintaining its appearance over time. The thickness specification also ensures that the material can handle potential stresses such as thermal expansion, wind uplift, and physical impacts without compromising performance.

Other materials listed, like high-yield copper, galvanized steel, and aluminum, have different thickness specifications and properties that may not meet the same requirements or standards for roof assembly applications as noted for cold-rolled copper. Each of these materials has its own advantages, but the focus on .0216 inches is specifically a requirement tied to cold-rolled copper's established standards within the roofing industry.