What type of concrete floor does the UL system C-AJ-1079 involve?

The UL system C-AJ-1079 specifically applies to concrete floors that are less than or equal to 5 inches thick. This specification is crucial because it delineates the appropriate materials and methods used for firestop systems designed to work effectively within this thickness range. The properties of thinner concrete can differ significantly from those of thicker concrete, particularly regarding structural integrity and how firestop materials interact with the substrate. Understanding the correct thickness is essential for ensuring compliance with safety and fire resistance standards outlined in firestop systems, which helps in maintaining building safety and performance during a fire event.