Obstructed construction requires a deflector distance of _____ below the beams to a maximum of 22" below the deck

Obstructed construction requires a deflector distance of _____ below the beams to a maximum of 22" below the deck

• A. 0-2 inches
• B. 1-6 inches
• C. 7-12 inches
• D. 13-22 inches

Answer: (B)

In obstructed construction, the sprinkler head’s spray must be able to reach the protected area without being blocked by structural members like beams. Placing the deflector only a small distance below the beams keeps the spray path clear of the beam edges while still staying within the safe clearance from the deck. The specified window of 1 to 6 inches below the beams is the range that provides reliable coverage around the obstruction without losing spray reach. The additional limit of a maximum 22 inches below the deck keeps the head within a practical mounting height for proper throw and coverage. So, the best distance is 1–6 inches.

In obstructed construction, the sprinkler head’s spray must be able to reach the protected area without being blocked by structural members like beams. Placing the deflector only a small distance below the beams keeps the spray path clear of the beam edges while still staying within the safe clearance from the deck. The specified window of 1 to 6 inches below the beams is the range that provides reliable coverage around the obstruction without losing spray reach. The additional limit of a maximum 22 inches below the deck keeps the head within a practical mounting height for proper throw and coverage. So, the best distance is 1–6 inches.