Paint Spray Booth Clearance Requirements

According to the International Fire Code (IFC) 2021, Section 2404.3.2, paint spray booths must have a minimum clearance of 18 inches from unprotected combustible materials.

This clearance requirement helps prevent heat transfer, fire spread, and ignition of nearby combustible materials due to the operation of the spray booth.

2. Why 18 Inches is the Correct Answer

Spray booths generate overspray, vapors, and heat, making clearance essential for fire prevention.

The requirement applies to combustible walls, ceilings, and storage materials surrounding the spray booth.

If combustibles are within 18 inches, additional fire protection such as fire-rated barriers or sprinkler protection may be required.

3. Verification of Other Options

Option A (12 inches) – Incorrect, as the IFC mandates a minimum 18-inch clearance.

Option C (24 inches) – Exceeds the standard clearance requirement but is not the official minimum. Incorrect.

Option D (36 inches) – Some jurisdictions may require larger clearances, but IFC mandates 18 inches as the minimum. Incorrect.

Reference Sources:

International Fire Code (IFC) 2021 – Section 2404.3.2 (Paint Spray Booth Clearance Requirements)

NFPA 33: Standard for Spray Application Using Flammable or Combustible Materials (Clearance Guidelines)

ICC Fire Inspector II Study Guide (2021)

Thus, the correct and verified answer is: B. 18 inche