RTUD and ATUD Now UL Listed As a Through-Penetration Firestop System Scott Fischer Whether you’re designing and building a one- or two-story single-family residence, or doing the same for a multifamily, mid-rise wood-frame structure, fire and smoke protection features must be considered, and in most cases are required. When a fire starts, time is of the essence and the... Read More September 2021 Issue #13266 Page 118