Which term describes the minimum required flow density per unit area for sprinkler coverage?

Which term describes the minimum required flow density per unit area for sprinkler coverage?

• A. Density/Area requirement
• B. Area density standard
• C. Flow-per-area guideline
• D. Cover area requirement

Answer: (A)

The concept being tested is the way NFPA 13R specifies how much water must be delivered to a defined area—the required flow density per unit area. This is captured by the term density/area requirement, which combines how much water (density) with the area over which that water must be available. In design, you specify a density (such as a certain gpm per square foot) and the area it applies to, ensuring the protected space receives adequate water to control a fire. The other phrasings aren’t the standard NFPA terminology used to describe this criterion, even though they might convey a similar idea.