Which symbol is commonly used to denote a fire escape in blueprints?

In blueprints, a dashed line is commonly employed to indicate a fire escape. This design choice serves multiple purposes: it differentiates the fire escape from other structural elements, provides visual clarity, and conveys specific information about the escape route's location and nature. Using a dashed line allows readers to quickly identify important safety features, such as fire escapes, without confusing them with solid structural elements like walls or columns.

Each type of line in architectural drawings usually has a specific meaning, and the standardized use of dashed lines for fire escapes is well recognized within the field. This not only enhances the readability of the blueprint but also communicates critical safety details effectively to builders, inspectors, and emergency personnel.