Top guiding rails are made of closed rolled sections, with mounting brackets which can be straightened. The project documentation specifies the requirements for installation accuracy when straightening the top guiding tracks.
The means and ways for connecting top guiding rails to the structural parts of the hangar are defined during hangar door design. After the installation is performed the executive survey is carried out which is further analyzed to give permission for final welding of the brackets.
Special rollers installed in the upper part of the doors travel along the top guiding rails and transfer the horizontal wind load to the construction of the hangar.
Type of power supply to the door leaves is defined by the technical specifications and design concept and can be a trolley current supply or a flexible closed-type cable circuit. Both systems reliably supply power to a door leaf. Trolley supply has strong light-weight housing, is reliable under intensive use, easy to install, and have high maintainability. It can be used both with interior and exterior doors with operating temperature range varying from + 40 to -50 °C.
System of aluminium profiles. Seals, sandwich-panels and plexiglass are fixed to the framing with special aluminium profiles. The colour of the framing, seals, sandwich-panels and plexiglass is agreed with the customer.
Door seals have high tensile strength and good sound insulation properties. Resistant to ultraviolet radiation, they retain their flexibility at low temperatures for a long period of operation.
Door leaves are made of closed rolled sections and can withstand not only static wind load, but also the total impulse load of the wind, in accordance with the data given in the technical specification.
Door leaves are made of separate frames having transport dimensions for easy delivery to the site.
The door leaves are shot-blasted and painted with high-quality enamel having a glossy texture effect. It is characterised by high abrasion and impact resistance and can withstand any weather conditions and ultraviolet rays.
Before sending to the customer, all door elements are assembled on a jig, where control measurements and marking are made. The work is performed in accordance with the requirements of the Door Installation Manual.
The gear motor is equipped with a special coupler, which allows to stop the door drive and move the door leaf manually in case of power outage.
In case of emergency use a special towing earring to move the leaves with a special transport.
Should power supply fail use a hand winch or a special transport to move door leaves.
Door control units are designed in accordance with Technical Specifications established with the Customer. Operator gives a controlling command from a portable or stationary control panel for smooth start and stop of the door leaves.
Light and sound alarm must be on when the door is operated to ensure its secure movement.
Gear motors transmit torque via chain drive to the drive wheels fitted on each door leaf. Block of gear motors guarantee each door leaf to move securely and stop in the position specified in the Project.
Niches where gear motors and control units are installed are protected with rolling shutters to ensure their secure and convenient operation.
Bottom guiding rails. Sleepers and rails, whose installation requires high accuracy, are fastened with studs fixed with chemical anchors. The cable heating system, which automatically maintains positive temperature of the tracks, prevents their freezing to the bottom seal of the hangar doors. Melt water is removed from bottom rails through a special drainage system.