They can be made of glass, aluminum or timber and have two or more compartments that 'swing' around in a circle to allow a person access to a building. The automatic operator in these doors turn the door continually.
This operator is usually located in the floor at the base of the door or in the roof at the top. The operator is not visible, to those walking through. Automatic revolving operator doors come with the safety features such as stop button which allows the doors to be turned off in a emergency.