Which type of fire door is often used for security in openings that cannot be obstructed?

Overhead rolling steel doors are often employed in situations where security and unobstructed access are paramount. These doors are typically robust and designed to withstand substantial impacts, making them a preferred choice for securing large openings, such as those found in warehouses, loading docks, and commercial buildings. Their rolling mechanism allows them to store neatly above the opening when not in use, ensuring that the passage remains clear and unobstructed. This feature not only enhances security but also facilitates easy access whenever needed.

In contrast, fire-rated swinging doors and horizontal or vertical sliding doors may not provide the same level of security or unobstructed access in critical situations. Swinging doors require space to open and can be blocked, while sliding doors may not be as secure against forced entry, especially at key entry points. Overhead rolling steel doors address both concerns effectively, making them the ideal solution for locations needing security without obstruction.