HVAC Psychrometric Chart Practice Questions Fire Protection - Ordinary Hazard III (Offices)

Ordinary Hazard Group III (Offices) - Quick Reference

Key Parameters:

Comparison Table

Hazard Class Fire Load Density (L/min/m²) AMAO (m²)
Light Hazard Low 2.25–4.5 84–150
Ordinary Hazard III Medium 5–7.5 216
Extra Hazard High 7.5–15+ 260–360

Recommendations

  1. Use quick-response sprinklers for faster activation.
  2. Ensure water supply ≥ 1,080 L/min (verify hydraulic calculations).
  3. Follow NFPA 13 or local codes for spacing (max ~3.7 m between sprinklers).
  4. Conduct regular fire risk assessments to confirm hazard class.

Note: Adjust if combustible load exceeds typical office materials (e.g., archives = higher hazard).