In other than Group i-3, what percentage of wall or ceiling area can be covered by combustible decorative materials?

The correct answer indicates that 10% of wall or ceiling area can be covered by combustible decorative materials in buildings categorized outside of Group I-3. This conforms to applicable building codes and safety standards that aim to minimize fire hazards in various occupancy types.

The limitation to 10% is grounded in balancing aesthetic considerations with the need for safety. Excessive amounts of combustible materials can significantly increase the risk of fire spreading, especially in commercial settings where occupancy loads and activity levels may elevate the potential for incidents. By capping the coverage at 10%, it ensures that decorative elements don't compromise the structural integrity and fire safety of the building, still allowing some flexibility for design within safe boundaries.

This regulation is particularly stringent in Group I-3 occupancies—such as correctional facilities—where increased fire safety measures are necessary due to the vulnerable nature of the occupants and the complexity of the environment. As a result, other occupancy categories adhere to this 10% guideline to maintain a safer atmosphere while permitting some decorative flexibility.