What materials are acceptable for bath fan venting under the Oregon Mechanical Specialty Code?
The OMSC, Section 501.5 states the same thing as Section M1501.1 of the ODSC. For the most part, then, the same provisions stated in question 1 would apply. Furthermore, OMSC has provisions for the penetration of fire-rated assemblies and those provisions are found in Section 603.5.5 and 603.6 and must be observed when applicable.
