Fire Prevention, Code Enforcement, and Inspection
Core Concepts
Understand the inspection process: pre-inspection research, entry and consent, systematic walkthrough, documentation, and follow-up. Know the difference between a code violation and a fire hazard, and the hierarchy of codes-model codes adopted locally, referenced standards, and local amendments. Master occupancy classifications and how they drive egress, sprinkler, and alarm requirements. Understand means of egress components: exit access, exit, and exit discharge; travel distance; dead-end corridors; and the common-path concept. Know fire-resistance-rated assemblies, opening protectives, and the role of the authority having jurisdiction (AHJ).
Traps to Watch
Questions swap the AHJ with the inspector-the AHJ is the organization or official with statutory authority, which may be a fire marshal, building official, or chief. Watch for egress questions where a component is mislabeled (a corridor is exit access, not an exit). Occupant load calculations often trip candidates: divide gross area by the occupant load factor, do not multiply. Distinguish retroactive requirements from new-construction requirements-existing buildings are often grandfathered unless a change of use triggers upgrades.
Worked Example
A 6,000-square-foot assembly space with an occupant load factor of 15 net square feet: 6,000 ÷ 15 = 400 occupants. That load determines egress width (typically 0.2 inches per occupant for level components) and the number of exits required. Rule of thumb: two exits are generally required above 49 occupants in most occupancies, but always verify the locally adopted code.
Rule of Thumb
Always divide by the occupant load factor-never multiply-and confirm the adopted code edition before citing a requirement.