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ALT BF73 Bifold Door System

ALT BF73 – the system of bi-folding doors is a modern, exclusive solution used in both residential and commercial markets: glazed openings for terrace exit, conservatories, effective application in show rooms, conference halls, hotels etc.

ALT BF73 allows to organize not only functional glazing of the large translucent openings, but also provides an attractive exterior and serviceability.

The functionality of the system makes it possible to realize the internal or external opening, to shift up to seven sashes in one direction. In the folded position, the sashes don’t occupy much space and release a wide opening, allowing to unify several rooms or a room with a street.


Technical characteristicsPerformance

Acoustic performance36 dB

Thermal insulationranging from 1.4 ~1.7 W/ (m2K)

Air permeabilityClass 4

Water permeability600 Pa

Burglar resistancePAS24

Maximum length6500 mm
16800 mm using inline connectors

Maximum number of panels to one sideseven

Meeting stile120 mm

Maximum panel height 3000 mm

Maximum panel width 1200 mm

Maximum panel weight 120 kg

Maximum glass thickness 44 mm

Mounting frame depth 73 mm

Mounting sash depth 73 mm

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