The fire-resistance rating of building elements must comply with the requirements of which of the following?

The fire-resistance rating of building elements must comply with the requirements outlined in multiple sources, which is why the correct answer encompasses all options provided. ASTM E 119 is a standard test method that evaluates the fire-resistive capabilities of building elements, providing a clear framework for assessing how materials perform under fire exposure. UL 263 is another testing standard that also measures the fire-resistance rating of building materials and assemblies, often used in industry practice to ensure safety and compliance with building codes.

Additionally, the International Building Code (IBC) 703.3 establishes requirements for fire-resistance-rated construction, detailing how different building elements should be constructed to meet fire safety standards. Given that each source contributes essential guidelines and requirements for determining fire-resistance ratings, they work synergistically to ensure comprehensive fire safety compliance in building design. This is why recognizing that all three sources are relevant is critical for a complete understanding of fire-resistance rating requirements in construction.