1. Introduction: The Critical Nature of Curtain Synchronization in Modern AtriaModern atrium design presents a unique paradox for fire protection engineers. While these vast, open-volume spaces are architecturally desirable, they pose significant risks for rapid smoke migration. To maintain tenable

## **1. Executive Summary**Smoke and fire curtain systems have become essential components in modern fire-protection engineering. Designed to control smoke migration, contain fire, and protect life safety, these systems provide flexible compartmentation without sacrificing architectural openness. As

### 1. What Does "EW 120" Mean?The classification comes from the European standard **EN 13501-2**, which defines the fire performance of construction products and building elements.* **E (Integrity):** This is the ability of the curtain to prevent the passage of flames and hot gases. An "E" classi