What is the minimum fire extinguisher rating required for Class A fires in a construction trailer office?
Correct Answer
C) 2-A
OSHA requires a minimum 2-A rated fire extinguisher for ordinary combustible materials in small office spaces. Larger areas would require higher ratings based on square footage.
Why This Is the Correct Answer
OSHA 29 CFR 1926.150(c)(1)(i) specifically requires a minimum 2-A rated fire extinguisher for Class A fires in construction areas. Construction trailer offices are considered small office spaces with ordinary combustible materials like paper, wood furniture, and fabric. The 2-A rating provides adequate coverage for the typical square footage and fire load found in these temporary office structures. Higher ratings are only required for larger areas or higher fire loads.
Why the Other Options Are Wrong
Option B: 20-A
20-A rating is far beyond what's needed for a small office space and would be appropriate for large warehouses or industrial facilities with significant Class A fire hazards.
Option D: 10-A
4-A rating exceeds the minimum requirement for small construction trailer offices. While this rating would be acceptable, it's not the minimum required by OSHA standards.
Memory Technique
Think '2-A for Trailer' - the smallest rating for the smallest office space on a construction site.
Reference Hint
OSHA 29 CFR 1926.150 - Fire Protection, specifically subsection (c)(1)(i) for portable fire extinguisher requirements
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