Water curtains are commonly created using pendent sprinklers or nozzles spaced how many feet on center?

Water curtains are commonly created using pendent sprinklers or nozzles spaced how many feet on center?

• A. 4 feet
• B. 6 feet
• C. 8 feet
• D. 10 feet

Answer: (B)

Water curtains rely on overlapping spray patterns to form a continuous barrier of water across an opening. To ensure the streams from pendent sprinklers or dedicated nozzles meet across the width and prevent gaps, a spacing of six feet on center is used. This distance typically provides enough overlap at standard discharge densities to create an effective curtain without over-wetting or unnecessary cost. If the sprinklers are placed closer, the system becomes more expensive without substantially improving the curtain; if they’re spaced farther apart, gaps can form and the curtain won’t reliably stop smoke or heat transfer. So, six feet on center is the standard spacing for an effective water curtain.

Water curtains rely on overlapping spray patterns to form a continuous barrier of water across an opening. To ensure the streams from pendent sprinklers or dedicated nozzles meet across the width and prevent gaps, a spacing of six feet on center is used. This distance typically provides enough overlap at standard discharge densities to create an effective curtain without over-wetting or unnecessary cost. If the sprinklers are placed closer, the system becomes more expensive without substantially improving the curtain; if they’re spaced farther apart, gaps can form and the curtain won’t reliably stop smoke or heat transfer. So, six feet on center is the standard spacing for an effective water curtain.