Alutech offers two types of garage doors differing in the leaf balance system.
Classic Garage Doors
Maximum size of this type of doors is 6000 x 3085 mm.
Leaf balancing is achieved by torsion springs located above the door leaf.
When connecting two parts of a shaft, adjustable connecting coupler enables to turn them against each other providing an equal cable rope tension.
Each torsion spring is fitted out by a special device (spring break device) which stops the door leaf in case of spring breakage preventing it from falling. Spring break devices are supplied without a price surcharge.
Intermediate hinges of special shape have high strength characteristics, providing reliable connection of doors panels. Moreover, these hinges are made of stainless steel and have high anti-corrosion features.
The door construction includes adjustable roller brackets. The brackets allow to adjust the level of adjoining of sandwich panels to the opening, thus providing additional thermal and sound insulation of the door. Roller brackets are made of high anticorrosion materials (stainless steel and aluminum). These materials are not subject to corrosion, that ensures reliable operation of sectional doors throughout the life-time.
Sectional doors are fitted out by polymeric rubber seals along their perimeter. Together with track profiles the seals provide reliable draft proofing of a passage.
There are three types of garage doors mounting (low, standard, and high) which allow to install Classic garage doors almost in every opening.
To mount Classic garage doors the headroom height should be not less than 100 mm for manual control, and 125 mm for electric drive control.
Standard Garage Doors
Maximum size for Standard garage doors is: width – 3,500 mm, height – 3,085 mm.
A distinctive feature of this type of doors is that leaf balancing is achieved by tension springs. Tension springs ensure easiness of the door movement and prevent their spontaneous lowering.
The tension springs in the Standard type of doors are located between the door leaf and vertical tracks, two on each side.
Use of this type of springs significantly reduces mounting time. The door mounting process usually takes 2.5 – 3 hours from the start of mounting to the moment when the product is accepted by the customer.
Sectional doors of the Standard type can be mounted almost in every garage opening. A 100 mm headroom height is required for their mounting, which is very convenient in case when old iron hinged doors are replaced by up-to-date Alutech sectional doors.
The "spring-in-spring" assembly provides additional safety to the doors. This system ensures protection against a spring back (spring release from the tracks) if one of the springs is damaged. The unique fixing method is protected by a patent.
Roller brackets design enables reliable and convenient adjustment of door leaf pressure onto a passage. The brackets guarantee better thermal and sound insulation, as well as protection from weathering.
A convenient system for adjusting the springs' tension. The tension of springs can be increased or decreased while mounting or during subsequent doors usage. Thanks to it a door service does not require a lot of time and costs.
Hidden mounting of end profiles makes a door more attractive. Sealing around the perimeter of a sectional door provides reliable draft proofing of an opening.