Which of the following is not a horizontal bracing system?

Diaphragms is not a horizontal bracing system.

Understanding the role of diaphragms in seismic design is essential for architects, engineers, and emergency management professionals. In the context of the Incident Command System (ICS), this knowledge helps in assessing the structural integrity of buildings after an earthquake and in planning for safer construction practices in earthquake-prone areas. For example, in the aftermath of the 1994 Northridge earthquake in California, emergency management professionals observed that buildings with well-designed diaphragm systems suffered less structural damage compared to those without.