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2. THE DOOR DESIGNATION
The sectional door is designed to cover the entrance of the building opening to restrict access
and to protect the premises from the effects of the environment and the noise.
3. THE DOOR DESIGN FEATURES
3.1. The door construction
The general construction of the sectional door consists of the following elements: a leaf, a leaf
balancing system and a guides system, the form of which determines the type of lifting.
The door leaf consists of the horizontal sandwich panels / panoramic panels, which are
interconnected with the special hinges. For watertight connections of the panels, a seal is
installed on their joints.
The door leaf balancing system can be of the following types:
1) a torsion mechanism,
2) a tension spring (only for domestic door).
During the opening, the door leaf, with use of a roller system, rises along the guide rails to the
ceiling, freeing up the door opening.
The door structure depends on the height of the door lintel and the architecture of the ceiling,
the type of the leaf lifting, as well as the kind of the motor drive used for door automation.
The door control is carried out both in the manual and (when a motor drive is installed)
automatic mode. The control in manual mode is carried out with the help of the handles fixed to
the door leaf, or a manual chain gear (when using a ceiling motor drive). The sending a signal to
open / close the door is carried out automatically by a control station (for the shaft drives), a
remote control (for the shaft drives in case when a receiver is installed), or other auxiliary
devices.
The basic configuration of the sectional door includes a latch, which is used for locking the door
from inside the building in the extreme closed position. For securing a possibility to close the
door leaf, both from inside and from outside of the premises, a lock can be installed (optional).
WHEN USING A LATCH, THERE MUST BE AN ADDITIONAL
ENTRANCE TO THE PREMISES.
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