An 18-inch deep x 3-foot wide duct is located with the top of the duct 20 inches below the upright sprinkler deflector. The sprinkler is centered above the duct. NFPA 13 (2016 Edition) has the 3x rule (188.8.131.52.1.3) which only applies to structural members in light and ordinary occupancies, and the duct is not over 4-feet wide which would require sprinklers by 184.108.40.206.3. Is this arrangement acceptable by code?
Note: This is a Daily Discussion question submitted anonymously to us. Submit a Question or Discuss This Here.
Our daily posts run during study season (June - October). Subscribe for posts on PE Problems and Daily Discussions, straight to your inbox, for free:
Complete Standings for the Weekly Exam Series:
Daily discussion questions are open-ended questions posed by members for the benefit of sharing expertise and learning from other perspectives. Join as a member here.
Visit July-October for daily Fire Protection PE Exam sample questions.
Solutions are posted the day after posting.
Comment with your solutions, questions or clarifications.
Please note that questions posted are unofficial and in accordance with NCEES rules are intended to be similar to actual exam questions, not actual exam questions themselves.