Sectional door
A sectional door is used to close halls or as a garage door . The door leaf is divided horizontally into several sections and closes from top to bottom. More rarely, there is also a vertical subdivision. Compared to the overhead door, the swing door and the swing door, it has the advantage that it does not require any space to open on the outside. The roller shutter competes with the sectional door . Roller and sectional doors can also be designed as high-speed doors .
The sections are joined together by joints like a chain and have rollers on the sides that are guided in rails . After opening, the door is in a horizontal position under the hall ceiling.
The sections can have translucent elements. A special feature is the option of installing a so-called wicket door . This results in savings in air-conditioned halls, since only the door and not the gate have to be opened to pass through, and thus less air exchange takes place between inside and outside. A wicket door can also provide an escape route if the door can no longer be opened.
The so-called floor profile can be designed as a safety profile. This responds when closing if a resistance is detected. This eliminates the risk of crushing. Regular testing is necessary and, in many cases, mandatory.