Ordinary Hazard Group 1 is defined as occupancies or portions of other occupancies where combustibility is low, quantity of combustibles is moderate, stockpiles of combustibles do not exceed 8 feet, and fires with moderate rates of heat release are expected.

References: NFPA 13 classifies occupancies into hazard categories based on factors such as combustibility, quantity of combustibles, and expected fire behavior, to guide the design and installation of appropriate fire protection systems.