Fire-Resistance-Rated Ducts as Alternatives to Shaft Enclosures

Samuel Flibbert, EIT

Cable tray and piping construction on site
Share this post

Aug 25, 2021

In a fire situation, ductwork serving HVAC or pressurization systems can if not properly protected, facilitate the spread of fire, smoke and toxic gas between areas otherwise isolated from one another. For this reason, the code requires the protection of ductwork by fire-resistance-rated (FRR) shaft enclosures. One alternative to the traditional shaft enclosure is the use of fire-resistance-rated duct materials tested for the application they shall be installed in. Utilization of fire-rated ductwork requires one to request the use of alternative means and methods per the process laid out in the code.

After reading this paper you will:

  • Learn about the requirements for alternative means and methods requests as they relate to fire-resistance-rated ducts
  • Understand the dimensions across which equivalency must be shown and what documentation must be provided for a successful alternative means and methods request
  • Be aware of the limitations of alternative means and methods requests
  • Review some of the challenges associated with the use of fire-resistance-rated duct assemblies

Read the whitepaper.

Sign up to receive the latest updates, news and insights from Jensen Hughes!

Connect With Us

Get In Touch

Contact

More blog posts from Jensen Hughes

Inspections And Monitoring Requirements In Industrial Stormwater Pollution Prevention Plans

Apr 3, 2025

In March 2021, the U.S. Environmental Protection Agency (EPA) released updated guidance on Stormwater Pollution Prevention Plans (SWPPPs) for industrial operators.

Industrial Stormwater Pollution Prevention Plans: General Location Map And Site Map Requirements

Mar 26, 2025

Learn the key mapping requirements for SWPPP compliance under NPDES industrial stormwater permits, including site maps, pollutant sources, and control measures.

Tips for Developing a Successful Emergency + Crisis Management Program

Mar 26, 2025

We offer guidelines that can be used for any situation and discuss paper-based vs electronic response plan management.