What testing method is specifically designed for non-rated curtain walls?

The testing method designed specifically for non-rated curtain walls is ASTM E2307. This standard focuses on evaluating the fire performance of non-rated curtain walls and their ability to resist the passage of flame and smoke. It establishes criteria to assess how well these wall systems function under fire conditions, ensuring that they contribute to the overall safety of a building by preventing fire and smoke from spreading.

In contrast, the other options pertain to different test methods with varying objectives. ASTM E1966 is intended for fire-resistive assemblies that may not necessarily relate to curtain walls. ISO 834 covers the standard fire resistance test for building elements, focusing primarily on rated assemblies. UL 263 outlines the fire tests of building construction and materials, again more concerned with rated products rather than the specific requirements for non-rated curtain walls. Therefore, the rationale behind choosing ASTM E2307 lies in its targeted approach toward non-rated curtain wall systems, making it the most relevant test for this application.