18-layer corridor design

Quick answer：

The 18-layer corridor design refers to a complex architectural design that incorporates multiple layers or levels of corridors within a building. These designs often aim to optimize space utilization, improve accessibility, and enhance the overall flow of traffic within the structure. The term '18 layers' suggests a particularly intricate or extensive design, potentially involving multiple stories or levels of interconnected corridors. Such designs are commonly found in large commercial buildings, hospitals, and other facilities where a high volume of foot traffic is expected.