专门为中庭设计的烟雾管理系统近年来已变得很普遍。然而，存在许多可能影响中庭烟雾管理系统有效性的情况。这些情况包括烟羽中的障碍物、中庭中预分层层的形成和“堵塞”，这是本报告讨论的研究主题。烟羽中的障碍物可能会将烟雾引向相邻空间，或导致烟雾与需要具备可维持条件的区域内的空气混合。当存在一层防火层时，火灾产生的烟雾可能不会到达天花板，并在天花板上向外排放，烟雾可能会在迁移到连通空间的地方积聚。

Smoke management systems, designed specifically for atria, have become common in recent years. However, a number of situations exist that may impact the effectiveness of the atrium smoke management system. Such situations include obstructions in the smoke plume, the formation of a pre-stratification layer in the atrium and "plugholing", which is the subject of the research discussed in this report. Obstructions in the smoke plume may direct the smoke into adjacent spaces or cause smoke to mix with air in a zone for which tenable conditions are required. When a prestratification layer exists, smoke produced by the fire may not reach the ceiling where it would be vented to the outside and smoke build-up could occur where it can migrate into the communicating spaces.