The hazard contents classification that represents the conditions found in most buildings and that is the basis for the general requirements in the Life Safety Code is:

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In the Life Safety Code, hazard contents classification determines how much protection a building needs. Most buildings fall into ordinary hazard, which is treated as the baseline for the general requirements. That means standard construction, protection features, and egress provisions are designed around typical amounts of combustibles found in offices, stores, and similar occupancies. If a space has very little combustibles, it would be low hazard; if there are more or more hazardous contents, the requirements would be higher (moderate or high hazard). So the classification that best fits most buildings and underpins the general requirements is ordinary.