Revolving doors are designed to create an efficient entrance system that allows people to enter and exit buildings safely and easily. They typically consist of multiple panels arranged in a circular or polygonal formation around a central axis. The panels are mounted on a spindle that rotates them simultaneously, allowing people to enter and exit without creating congestion or disrupting airflow. The doors are usually made of glass or metal, and feature a variety of safety features, such as speed controls, sensors, and locking mechanisms. The doors are also designed to provide energy efficiency by minimizing the transfer of outdoor air into the indoor environment, thus reducing heating and cooling costs.
The history of revolving doors dates back to the late 19th century when they were first patented in the United States by Theophilus Van Kannel. At the time, traditional doors were problematic in many ways, including difficulties with energy efficiency, ventilation, and safety. Van Kannel's invention aimed to solve these problems by creating a door that would rotate around a central axis, minimizing the transfer of air between the indoor and outdoor environments while allowing for safe and efficient passage of people. Revolving doors quickly gained popularity in commercial and public buildings, particularly in areas with high foot traffic, such as train stations, hotels, and department stores. Today, revolving doors continue to be used in many types of buildings around the world, providing an elegant and functional entrance solution.
Revolving doors are efficient because they create a barrier between indoor and outdoor environments, which minimizes the transfer of air and reduces heating and cooling costs. Additionally, they allow for safe and efficient passage of people, preventing congestion and maintaining a steady flow of foot traffic.
The typical capacity of a revolving door can vary depending on the number of panels and the size of the door. However, a standard 3-wing revolving door can accommodate up to 20 people per minute, while a larger 4-wing revolving door can accommodate up to 30 people per minute, making them ideal for high traffic areas.
The number of people who can go through revolving doors at the same time depends on the specific design and capacity of the door, as well as the size and physical ability of the people using it. Generally, it is recommended that users enter and exit one at a time to ensure safe and efficient passage. However, many revolving doors are designed to accommodate multiple people at once.