In Group R-3 occupancies, the minimum height for guards is measured above what?

In Group R-3 occupancies, which include residential structures such as single-family homes, the minimum height for guards is crucial for safety and is measured above both adjacent walking surfaces and adjacent fixed seating. This approach is important as it takes into account various scenarios where individuals may be positioned, ensuring that the guardrail or barrier is adequate to prevent falls from elevated areas.

By measuring the height of guards above both walking surfaces and fixed seating, the regulation provides a comprehensive safety standard that addresses different usage and occupancy patterns. Walking surfaces could include floors, landings, and stairs, while fixed seating can refer to built-in seats in areas such as theaters or assembly rooms. Ensuring this measurement helps mitigate the risk of falls and enhances overall safety for occupants, making the guard's design functional in diverse situations.

Hence, the correct answer acknowledges that guard heights are determined by considering safety from multiple aspects within the occupancy, reflecting a thorough understanding of building safety requirements.