Definition of Extra-High-Rack Combustible Storage
According to International Fire Code (IFC) 2021, Section 3206.6, extra-high-rack combustible storage is defined as:
Class I, II, III, or IV commodities stored on racks exceeding 40 feet in height.
High-hazard commodities stored on racks exceeding 30 feet in height.
2. Understanding Rack Storage Classifications
Class I-IV Commodities: These refer to general, moderate-risk combustible materials such as wood, paper, and plastics.
High-Hazard Commodities: These are materials that have a higher fire risk, such as highly combustible plastics, flammable solids, and products prone to rapid heat release.
3. Verification of Other Options
Option A (20; 30) – Incorrect, as 40 feet is the correct threshold for Class I-IV commodities.
Option B (30; 40) – Incorrect, as 30 feet applies to high-hazard commodities, not Class I-IV commodities.
Option D (50; 40) – Incorrect, as the correct heights are 40 feet and 30 feet, respectively.
Reference Sources:
International Fire Code (IFC) 2021 – Section 3206.6 (Definition of Extra-High-Rack Storage)
NFPA 13: Standard for the Installation of Sprinkler Systems (High-Rack Storage Requirements)
ICC Fire Inspector II Study Guide (2021)
