What is the maximum area protected by a Sprinkler System Riser?

What is the maximum area protected by a Sprinkler System Riser?

• A. 20,000 ft² (1860 m²)
• B. 100,000 ft² (9290 m²)
• C. 52,000 ft² (4831 m²)
• D. 30,000 ft² (2790 m²)

Answer: (C)

In NFPA 13R for low-rise residential systems, each Sprinkler System Riser is designed to cover a defined maximum area. The code sets this per-riser protection area at fifty-two thousand square feet (4,831 m²). That means a single riser can serve up to that area; if the building’s protected area would exceed it, you need additional risers or separate zoning to stay within the limit. This limit is there to keep hydraulic demands, water supply, and pressure within what the system can reliably deliver for residential occupancies. If the building is larger than the per-riser maximum, you split the system into multiple risers to ensure adequate coverage and performance. So the maximum area protected by one Sprinkler System Riser is fifty-two thousand square feet.

In NFPA 13R for low-rise residential systems, each Sprinkler System Riser is designed to cover a defined maximum area. The code sets this per-riser protection area at fifty-two thousand square feet (4,831 m²). That means a single riser can serve up to that area; if the building’s protected area would exceed it, you need additional risers or separate zoning to stay within the limit.

This limit is there to keep hydraulic demands, water supply, and pressure within what the system can reliably deliver for residential occupancies. If the building is larger than the per-riser maximum, you split the system into multiple risers to ensure adequate coverage and performance.

So the maximum area protected by one Sprinkler System Riser is fifty-two thousand square feet.