Appendix D. Discussion on Evaluating Duct Openings When Penetrating 2-Hour Fire Walls

DOE-STD-1066-99

Users of the design criteria found in this Standard are encouraged to utilize the information obtained from

the cited research for qualifying ducts for a 2-hour fire-rated exposure when a fire damper is not desirable

in a confinement ventilation system. However, when qualifying duct configurations not fire tested by the

research, users are cautioned to apply the research results only when applicable designs are supported

by engineering calculations performed by qualified engineers competent in the technology.

D-2