When a roof meets a parapet wall, how far above the roof line must the parapet extend?

When a roof meets a parapet wall, how far above the roof line must the parapet extend?

• A. 18 inches
• B. 24 inches
• C. 30 inches
• D. 36 inches

Answer: (C)

The correct answer is that a parapet wall must extend at least 30 inches above the roof line. This height requirement is typically related to safety regulations and fire safety considerations. A parapet of this height helps to prevent falls off the roof edge and also assists in controlling the spread of fire in the event of a roof fire. These regulations are often in place in building codes to ensure that roofs are designed with proper safety measures, particularly for flat or low-slope roofs. While other heights might seem plausible, they may not meet specific local building codes that stipulate the minimum required height for parapets. This is especially important in urban environments or around building openings where the risk of falls or fire hazards is heightened.

The correct answer is that a parapet wall must extend at least 30 inches above the roof line. This height requirement is typically related to safety regulations and fire safety considerations. A parapet of this height helps to prevent falls off the roof edge and also assists in controlling the spread of fire in the event of a roof fire. These regulations are often in place in building codes to ensure that roofs are designed with proper safety measures, particularly for flat or low-slope roofs.

While other heights might seem plausible, they may not meet specific local building codes that stipulate the minimum required height for parapets. This is especially important in urban environments or around building openings where the risk of falls or fire hazards is heightened.