Durable and slender profiles enable the construction of low-threshold doors with a leaf weight of up to 600 kg, a height of up to 3.24 m and a width of up to 3.3 m available solutions with a narrow mullion, in which the visible width of the profiles at the junction of the door leaves is only 47.5 mm or 50 mm. The MB 77HS system belongs to the products with the best parameters and meets all the requirements for this group of products. It has two construction variants that differ in thermal insulation: ST and HI. The structure of the profiles allows for the production of exclusive doors of large dimensions, filled with single- or double-chamber glass, and the materials and technical solutions used help achieve a high degree of thermal and acoustic protection. Thanks to its properties, this system is perfect for both single-family buildings and comfortable apartments or hotels.

Large permissible dimensions of the structure, allowing the construction of doors with a leaf height of up to 3000 mm and a width of 700 to 1200 mm. The largest number of threshold solutions, e.g. with cover sealing or convenient to use - with a hidden threshold. A large range of glazing from 13.5 to 61.5 mm, which allows the use of both single- and double-chamber packages, including specialized ones: with increased acoustic insulation or burglary resistance. A wide range of compatibility of the construction of the MB 86 FOLD LINE HD system with the well-known and respected ALUPROF MB 86N window and door system: connecting profiles as in MB 86N, as well as some sections, gaskets and accessories common to both systems. Three-chamber, durable aluminum sections with a construction depth of 86 mm for frames and 77 mm for door leaves. Corner and panoramic solutions available - the structure can be assembled from 8 wings. The central chamber of the sections is equipped with thermal breaks 24 mm wide for frames and 34 mm wide for door leaves, which translates into high thermal insulation of the structure. Specialized fittings dedicated to the MB 86 FOLD LINE HD system, guaranteeing comfortable operation of door leaves with a maximum weight of 120 kg.