What percentage of wall length can the openings aggregate width reach at any floor level?

The correct answer indicates that the aggregate width of openings in a wall at any given floor level should not exceed 25% of the total wall length. This limitation is primarily designed to ensure the structural integrity of the building. Wall openings such as windows and doors can compromise the wall's ability to resist lateral loads, such as wind and seismic forces. By restricting the openings to 25% of the wall length, the structural support provided by the wall is maintained, ensuring safety and stability.

In commercial buildings, meeting this requirement helps in distributing loads effectively and prevents potential issues such as wall failure or excessive deflection. Such regulations are typically outlined in building codes to promote safety and ensure that structures can withstand various environmental pressures and maintain their intended function. Thus, adherence to this 25% threshold helps builders, inspectors, and architects create safe and compliant designs.