Which specification would detail the performance of firestop systems?

The correct choice is the option that encompasses a comprehensive view of the performance characteristics and standards for firestop systems. Each of the mentioned specifications—UL certification, ASTM guidelines, and FM approvals—provides critical information regarding the safety and effectiveness of firestop materials and installations.

UL certification is essential as it indicates that a firestop system has been tested and meets specific safety standards set by Underwriters Laboratories. These standards ensure that the materials can withstand fire and smoke, thereby preventing the spread of fire between compartments.

ASTM guidelines offer a set of standardized testing methods and practices for materials and products, including firestop systems. These guidelines establish criteria for evaluating the performance of materials in various conditions, giving engineers and designers a basis for selecting appropriate firestop solutions.

FM approvals provide another layer of assurance, focusing on the reliability and performance of firestop systems during a fire event. The Factory Mutual (FM) system conducts rigorous testing and evaluation to certify that products will perform under extreme conditions.

Each of these specifications plays a vital role in defining and validating the performance of firestop systems, highlighting their fire-resistance capabilities, ease of installation, and overall effectiveness in protecting structures from fire hazards. Therefore, acknowledging all of these specifications is crucial for understanding the comprehensive performance of