Which Construction Classification has a rating of 1.0?

• A. Type 2
• B. Type 4
• C. Type 3
• D. Type 1

Answer: (C)

In NFPA 1403, Construction Classification uses a numeric rating to indicate how a training structure’s construction behaves under fire and what its fire-resistance characteristics are. The number assigned to each construction type helps instructors choose props that match the training scenario and safety expectations.

The rating of 1.0 is associated with Type 3 ordinary construction, which is why this option is correct. This type represents a middle ground in fire resistance and behavior between the more fire-resistive options and the less fire-resistant ones.

Types with higher fire-resistance classifications (like Type 1 or Type 2) carry different, typically higher, rating values, reflecting their stronger noncombustible or fire-resistive characteristics. Type 4, being heavy timber, has its own rating value distinct from 1.0.

So, the construction type that has a rating of 1.0 is Type 3.