The invention relates to a point-fixed curtain wall system. This system is designed for construction and execution of all-glass point-fixed glazing, wherever thermal insulation is not required. It allows the external walls of buildings to be executed in a single plane, giving a smooth surface elevation. The system according to the invention can be used in both residential and large public buildings. In addition, this system can also be used inside buildings thus serve as a decorative interior. The use of decorative glass, eg. with screen printing, will complete a range of application of the system according to the invention.

From the prior art there is known the publication WO9421880, which discloses the water-tight performance of an exterior curtain wall system assembled from multiple wall panels and glass window panes. The design utilizes concealed water drainage mechanism within pressure equalized wall cavities and thus prevents the exterior water from reaching the field formed sealed wall joints. Therefore, any deficiencies in field workmanship or durability of sealant material will not produce water leakage problem.

Publication WO2010063297A1 discloses a mounting system for attaching at least one insulating glass pane having at least two parallel glass panes spaced apart from each other by means of at least one spacer profile in a window frame or at a fagade, particularly at a post and/or a beam of a post-and-beam design. The mounting system is further developed in that at least one connecting body is disposed at the spacer profile, comprising at least one hole for receiving a mounting screw or a connecting screw, wherein the insulating glass pane can be mounted in the window frame or on the fa ade by means of the mounting screw (, or connected to a further insulating glass pane by means of a connecting screw, using the at least one connecting body.

The curtain wall mounted according to the invention is characterized in that:

1) the following sections are used in the upper part of the system fastening:

a) connecting bracket (UL1) having an L-shaped cross-section, which has two through holes on each side wall, designed individually in each case, and two through holes on the rear wall; b) first end profile (UK1) with a U-shaped cross-section connected with a T-shaped cross section piece, wherein the beam thereof has two through holes;

c) second end profile (UK2) having a U-shaped cross-section, connected to the piece of a T-shaped cross section, which beam has two through holes, wherein there is a recess on the outer surface of one of the arms of the U-shaped section,

wherein the connecting bracket (UL1) directly connects to a load- carrying structure, and to connect the connecting bracket (UL1) with the load-carrying structure the dowels are used, or other pegs dependent on and appropriately matched with the material from which the load-carrying structure is made, then the first end profile (UKl) or second end profile (UK2) is connected to the connecting bracket (UL1), depending on what kind of bracket is selected to the design, wherein the screw connection is used to connect the connecting bracket (UL1) with the first end profile (UKl) or second end profile (UK2), and the glass pane is mounted in the selected end profile (UKl, UK2), and there is a pressure seal (UD3, UD4, UD5, UD6) between the end profiles (UKl, UK2) and the glass pane, which is chosen for the thickness of the glass applied,

) the following sections are used in the central part of the system fastening:

a) connecting bracket (UL1) ;

b) central profile (USl) with a U-shaped cross section connected to a T-shaped cross section piece, which beam has two through holes, wherein one of the arms of the U-shaped section is L-shaped, which bottom shorter part has at least one hole parallel to its longer arm;

c) first covering profile (UM1) with a cross-section similar to the letter L, which shorter arm comprises at least one through hole;

d) second covering profile (UM2) with a cross-section similar to the letter L, in which the longer arm has the recess, and the shorter arm comprises at least one through hole;

wherein the connecting bracket (UL1) directly connects to a load- carrying structure, and to connect the connecting bracket (UL1) with the load-carrying structure the dowels are used, or other pegs dependent on and appropriately matched with the material from which the load-carrying structure is made, then the central profile (USl) is mounted to the connecting bracket (ULl), and to connect the connecting bracket (ULl) with the central profile (USl) a screw connection is used, then depending on the chosen design, the central profile (USl) is connected to the first covering profile (UM1) or the second covering profile (UM2), wherein the glass pane from the upper part of the system is mounted between the central profile (USl) and the selected on of the covering profiles (UM1; UM2), and there is the pressure seal (UD3, UD4, UD5, UD6) between the surfaces of the central profile (USl) and the selected covering profiles (UM1, UM2) and the glass pane, which is chosen for the thickness of the glass used, and the glass for the bottom part of the system is fixed in the central profile (USl) and there is the pressure seal (UD3, UD4, UD5, UD6) between the brackets in the central profile (USl) and the glass pane, which is chosen for the thickness of the glass used;

) the following sections are used in the bottom part of the system fastening:

a) connecting bracket (ULl);

b) starting profile (UP1) with an L-shaped cross section connected with the T-shaped cross section piece, which beam has two through holes and at least one hole in the short arm of the profile L parallel to its longer arm;

c) first covering profile (UM1) ;

d) second covering profile (UM2) wherein the connecting bracket (UL1) directly connects to a load- carrying structure, and to connect the connecting bracket (UL1) with the load-carrying structure the dowels are used, or other pegs dependent on and appropriately matched with the material from which the load-carrying structure is made, then the starting profile

(UP1) is mounted to the connecting bracket (UL1), and to connect the connecting bracket (UL1) with the starting profile (UP1) a screw connection is used, then depending on the chosen design, the starting profile (UP1) is connected to the first covering profile (UM1) or the second covering profile (UM2), and the bottom edge of the glass pane from the bottom part of the block is fastened between the starting profile (IP1) and the selected covering profile (UM1; UM2), and there is the pressure seal (UD3, UD4, UD5, UD6) between the surface of the starting profile (UP1) and the selected covering profile (UM1, UM2), which is chosen for the thickness of the glass used.

The invention is described in embodiments in the drawing, in which fig.1-10 illustrate embodiments of the point-fixed curtain wall with details, Fig. 11 - pressure seals, Figs. 12-13 - first end profile, Figs. 14- 15 - central profile, Fig. 16-17 - connecting bracket Figs. 18-19 - first covering profile, Figs. 20-21 second end profile, Figs. 22-23 - starting profile, and Figs. 24-25 - second covering profile.

The system curtain wall according to the invention was made by horizontal bands of glass panels attached using a minimalist brackets. The construction of the glazing is at different distances from the load-carrying structure of the building and varies depending on the angle of inclination and the applied height of glass. The maximum width of which was obtained for one segment is 1500 mm. Maximum height, realizable for one segment is 1000 mm. This is not, however, a limitation for the creation of the walls in the system according to the invention, wherever there is a need to cover a larger surface elevations. If there is a need to make the glazing with larger surface areas, the next band of glass panes shall be applied in the vertical direction, mounted on the system brackets and another segment in the horizontal direction, bearing in mind that the structure of the next segment of the system curtain wall according to the invention is in the minimum distance of 235 mm from the axis of extreme fasteners. This distance is required to obtain a 10 mm gap between the panes of subsequent segments. These gaps provide free air movement and allow the wall to breathe. The system according to the present invention also provides the possible corner connections. To make the corner connection possible it is necessary to increase a distance from the axis of the extreme fastening component to the end of the glass pane.

The frameless system has unlimited use in modern building. Visible dimensions of glass fastening brackets are for example 85 x 50 [mm] for the upper band (mounting with the brackets marked as end profiles (UK1; UK2). Visible dimensions of the middle band brackets are for example 85 x 58 (mounted with the holders marked as the central profile (US) and covering profiles (UM1; UM2). Visible dimensions of the mounting brackets for the bottom band are for example 85 x 50 [mm] in the case of mounting with the use of the starting profile (UP1) and the first covering profile (UM1) or 85 x 50 [ mm] for mounting with the use of the starting profile (UP1) and the second covering profile (UM2).

The new shape of the profiles allows the windows to be installed in horizontal bands. The shapes of sections / brackets allow you to build a wall, which will consist of e.g. five fields upwards for the glass with a height of 1000 mm and an inclination angle of 2° or six fields upwards for the glass with a height of 400 mm and an inclination angle of 5°. A special connector (connecting bracket (UL1) dedicated for this system enables the wall mounting on the load-carrying structure made from wood or directly to the structural components of the building.

The walls performed in the system according to the invention can be made as multicolour. There are internal and external components. Internal and external components are the components prepared to installation independently of one another. Therefore, these components can be made in two different colours. Thus, it is easier to adjust the entire curtain wall in the system according to the invention, to the other components of the facade of the building on which the system will be used. To protect the surface of the system components from the harmful effects of corrosion the two techniques can be used, for example, such as powder coating according to AL colours and anodizing in accordance with the requirements of the mark QUALANOD. All components of the walls are made according to the applicable European standards. Wall system according to the invention, should be made in accordance with the design, developed individually for each facility. The filling tiles and accessories for mounting the connecting brackets (UL1) to the building structure should be determined on the basis of the system documentation and static calculations in the design.

The entire system of the invention is made of aluminium sections. The components are made of aluminium obtained in the plastic processing from the aluminium alloy EN AW-6060 T66 (AIMgSiO, 5 F22) in accordance with the following standards:

• chemical composition of the alloy PN-EN 573-3:1998, PN-EN 515:1996, (DIN 1725 T.l),

· shape and dimensions of aluminium sections DIN 17615 T.3,

• mechanical properties PN-EN 755-2:2001,

• meet the requirements of PN-EN 755-1:2001.

The section surfaces are finished with anodized oxide coatings or powder coated polyester. Such a surface finish of the material used for curtain wall mounting system is necessary to properly protect the system components against corrosion. Corrosion and its process is a dangerous phenomenon, which can be deadly. That is why it is so important to protect the surface (whether in an anodizing or powder coating process) in accordance with the following guidelines.

Anodic oxide coatings as required:

- Layer thickness of not less than 20 microns according to PN-EN ISO 2360:1998 or PN-EN ISO 2808:2000,

- Appearance according to PN - 80/H-97023, - The sealing degree of the coating 20 microns according to PN-90/H- 04606/02 impedance greater than 10 kO,

- Corrosion resistance of the coating according to PN-76/H-04606/03, Polyester powder coating as required:

- Thickness of the coating according to PN-EN ISO 2360:1998 or PN-EN ISO 2808: 2000 not less than 60 μιτι,

- The relative hardness of the coating according to PN - EN ISO 1522:2001,

- Resistance to tearing from the base according to PN - EN ISO 2409:1999 - degree 0,

- Resistance to salt mist according to PN - ISO 7253:2000/Ap 1:2001 - coating unchanged after 1 000 h,

- Resistance to liquids according to PN - EN ISO 2812-1:2001, Glass panel seals embedded to support the glass panes in transparent and opaque bands are made of EPDM synthetic rubber according to DIN 7863 and DIN 7715 E2 executive standard.

Designed pressure seals UD3, UD4, UD5, UD6:

• made of rubber compound 3EP7002,

· in black,

• polymer mixture based on EPDM rubbers,

• with a density of 1,22 g/dm ³ ,

The wall made using the system according to the invention may be glazed continuously with the panels of a thickness of 6 mm to 13 mm, which meet the requirements described in the PN - B - 13079. The glazing thickness depends on the size and type of application. Tempered glass can be used (for interior finish components in buildings) as well as tempered and laminated glass (for finishing the exterior walls of buildings). In the case of the use of glass having a thinner thickness it is necessary to apply thicker glass panel seals properly matched to the thickness of the glass. Fasteners (self-drilling screws, self-tapping screws, bolts, washers, nuts) used for making connections are made of stainless steel according to the standards mentioned in the system documentation. A wall made according to the invention is fastened to the building structure by means of special connecting brackets (UL1) that are screwed into the building wall by special dowels or other pegs suitable for the material from which the load-carrying component of the building is made. In the case of heavy glass panes the number of brackets in which the glass is fixed should be increased. The gaps of 10 mm in width are designed between the panes of successive segments that are intended to provide the glass work under the influence of changing weather conditions. When mounting the glass panes with a thickness of 13 mm, it should be remembered that only 3 mm thick pressure seal is applied for the entire structure. Adjustment, depending on the thickness of the glass used is carried out by a suitably chosen pressure seal and so the thinner glass the thicker seal shall be used.

In carrying out static calculations for the walls of the system according to the invention the snow load can be completely omitted due to the lack of possibility to install the system on the building roof or at an angle that causes retention of snow. Wind load, must be determined on the assumption that the wind blows perpendicularly to the wall, giving the most unfavourable load for the building, member, or partitions, and that all the windward and leeward surfaces of a building, member, or partition are subjected to an evenly distributed pressure or suction of the wind. In designing the facade present in the corners of the building it is necessary to take account of increased local edge load. Accurate wind load calculations should be made by the designer of the building according to PN - EN 1991-1-4 and the cross-section of the load bearing section should be appropriately selected according to PN - EN 1999-1-1.