What standard do trusses need to be built under?

Trusses are structural components that must comply with specific standards to ensure safety, performance, and reliability in construction. The correct answer pertains to E-119, which is associated with the testing of fire-resistive materials and products, including those used in construction like trusses. This standard outlines the criteria for determining the fire resistance of building elements, which is crucial for ensuring that trusses will perform adequately when subjected to fire conditions.

Understanding that trusses often play a significant role in the structural integrity and fire safety of a building highlights the importance of adhering to fire resistance standards. By following E-119, builders can ensure that these components meet the necessary criteria to resist fire and maintain structural support during an incident.

The other options refer to different standards: NFPA 101 pertains to life safety in buildings, OSHA standards focus on workplace safety, and UL 263 covers the fire tests of building construction and materials. While all are important in their respective domains, E-119 specifically addresses fire resistance in assemblies that would include trusses, making it the most relevant choice in this context.