Look up a UL fire-resistance BXUV assembly and determine restrained vs. unrestrained rating applicability

Steps

1. Search UL Product iQ using the BXUV category along with the structural member type (beam, column, floor-ceiling, roof-ceiling) and desired fire-resistance rating.
2. Determine whether the actual building condition qualifies as restrained (surrounding structure resists thermal expansion) or unrestrained (assembly is free to rotate/expand) per BXUV's general/guide information criteria.
3. Select the design listing that matches the determined restraint condition, noting that unrestrained ratings are typically more conservative and may require greater protection thickness than restrained ratings for the same assembly.
4. Confirm the specific design's tested substrate, member size/shape, and protection material match actual field conditions before relying on its published thickness.
5. Coordinate with the structural engineer of record to formally document the restraint classification, since it is a structural determination rather than solely a fireproofing-contractor judgment call.