ICC Commercial Mechanical Practice Exam

True or False: Hazardous exhaust duct systems that penetrate fire-resistance-rated walls must be enclosed in fire-resistance-rated construction.

1. True

2. False

3. Not specified

4. Depends on the situation

The correct answer is: True

The statement is true because hazardous exhaust duct systems that penetrate fire-resistance-rated walls must indeed be enclosed in fire-resistance-rated construction. This requirement is in place to maintain the integrity of the fire-resistance-rated assembly and to prevent the spread of fire and smoke from one area to another. When hazardous materials are involved, such as flammable gases or toxic fumes, any ducts that pass through walls that have a designated fire-resistance rating must be properly protected to ensure that any potential fire originating from the duct system does not compromise the fire integrity of the building. The construction materials used for enclosing the ducts must also meet specific fire-resistance ratings to provide the necessary level of safety during a fire event. Overall, adhering to these requirements is fundamental in ensuring life safety and property protection within commercial structures, aligning with building codes and fire safety regulations.