Clearance Requirement for Sprinkler Systems Over Flammable Liquid Storage
According to International Fire Code (IFC) 2021, Section 5004.6 and NFPA 30: Flammable and Combustible Liquids Code, Section 16.5.1, there must be a minimum of 18 inches of clearance between the top of flammable liquid storage and the deflector or discharge orifices of a sprinkler system.
This ensures unobstructed sprinkler discharge for effective fire suppression.
2. Why 18 Inches is the Correct Answer
The 18-inch clearance allows sprinklers to operate properly, ensuring water distribution is not blocked by stored materials.
NFPA 13 also mandates an 18-inch minimum clearance for standard storage applications with sprinklers.
3. Verification of Other Options
Option B (24 inches) – Incorrect, as the IFC and NFPA specify 18 inches as the minimum requirement.
Option C (30 inches) – Incorrect, as this exceeds the required minimum clearance.
Option D (36 inches) – Incorrect, as the IFC and NFPA do not require this much clearance.
Reference Sources:
International Fire Code (IFC) 2021 – Section 5004.6 (Sprinkler Clearance Over Flammable Liquid Storage)
NFPA 30: Flammable and Combustible Liquids Code – Section 16.5.1
NFPA 13: Standard for the Installation of Sprinkler Systems – Minimum Clearance Requirements
ICC Fire Inspector II Study Guide (2021)
Thus, the correct and verified answer is: A. 18 inches. ✅
