Fire Fighting, Interior Structural : The physical activity of fire suppression, rescue, or both, inside of buildings or enclosed structures that are involved in a fire situation beyond the incipient stage
NFPA 1081 Standard for Industrial Fire Brigade Member Professional Qualifications, 2007 ed. https://www.alabamafirecollege.org/docs/skills/ifb -skills.pdf?Status=Master&sfvrsn=2, (Std: Ind Fr Brgd Member Prof Qualf - Amer) {375 NFC}