Description

This standard is used to evaluate the ability of structural components, such as walls, columns, floors, and beams to contain fire and maintain structural integrity.

It subjects assemblies to standardized furnace temperatures (up to 2000^oF in 4 hours) to determine fire resistance ratings, typically 1 - 4 hours.

Scope

Scope: Applicable to masonry units and composite structural materials, including load-bearing and non-load-bearing assemblies.

Methodology: The test measures heat transmission through the assembly and structural load-carrying capacity during a controlled fire, which may include a hose stream test.

Time-Temperature Curve: The furnace follows a specific curve, reaching approximately 1000^oF (538^oC) in 5 minutes and up to 2000^oF (1093^oC) after 4 hours.

Industry Application: This standard (also identified as ANSI/UL 263) is considered the default standard for structural steel fire protection in North America.

Application & Listings: Fire-rated designs, such as walls and roofs, are cataloged in the UL Product iQ database.