What are the steps involved in using and understanding the UL Fire Resistance Directory?
When first using the UL Fire Resistance Directory, it is suggested you review the relevant Guide Information. The Guide Information for each product area contains many essential details you need to know to understand what follows. It typically contains: • Information on the equipment, materials or systems included in the product area or category. • Intended use, restrictions or applicable supplemental information. • Standards used to evaluate products under the product area or category. • Information on the UL Listing or Classification Marking that applies to the product area or category. The Guide Information for the basic columns, beams, floor/ceilings, roof/ceilings, and walls is found near the beginning of Volume 1 of the directory under the heading “Fire Resistance Ratings – ANSI/UL 263 (BXUV)”. Included in this Guide Information is a table identifying the significance of the alphanumeric characters of the design numbering system. For example, this table will identify that U300 se
