Junction of frames of different sizes Possibility of junction of frames of different sizes allows to optimize the choice of materials in central wings of the building and to choose a matching profile in loaded (corner) facade areas.
Multi-chamber frame profiles During workshop assembly of the units frame profiles cutting is performed under the angle of 45° as in case of frames assembly process. Frame profile has three closed chambers. Multi-chamber frame profiles used together with angles assembled with the help of three jetnut elements give additional degree of fixity and durability to the element. Jetnut elements are treated with one- or two-pack glue, during structure assembly, angles fixation is possible with the help of angle-crimping tool or with the help of stub nails.
Two types of transom bars junction Transom profiles fixation is made with the help of end self-tapping screws. Besides, there is a set of transoms with jetnut elements mounting. The system has a screw and stub nail fastening of a front, middle and back parts of a transom in order to ensure some additional security of T-junction. Compared to alternative systems key feature of ALT EF65 system is the absence of complex profiles’ shaping operations during structure assembly, which minimizes the time of modules’ assembly, reduces labour input, raises end product quality.
Two ways of glazing beads fixation Modules glazing and panels or window constructions installation is made in a warehouse right at a time of elements’ assembly. Infill units in this system are fixed with the help of glazing beads and wedging gaskets. Glazing beads cutting is done at an angle of 45°, which differs from window-door structures. In order to exclude a spontaneous clicking off of glazing beads during the process of transportation and units’ assembling, and also during the process of building envelope exploitation. There are following methods of fixation provided in ALT EF65 system:
With the help of end self-tapping screws;
With the help of EF65.2000 element made from stainless steel.
Several possible variants of angle module realization Modules (units) can be joined at a random angle depending on the configuration or building fasade. It is possible to rotate the fasade on the angle of 1,5° to the side along the lone of units’ junction in case of standard gasket choice. In the place of fasade rotation at the angle of ±90° it is necessary to use angle modules, which are produced with the help of special angle mullions profiles.
Horizontal profiles chambers completeness Horizontal profiles chambers completeness in angle modules provides additional level of facade impermeability.
Additional mating element Using of additional mating element (EF65.1953 pivot and EF65.1954) in corner and two-sectional modules allows to provide equal windload distribution on vertical profiles.
Bearing kit availiability System mounting elements are used in order to fasten the units to building footing. Bearing kits for units installation on the building are made of steel with zinc covering. This products are complemented with different metalware and provide an easy and secure fastening, adjustment, strain expansion compensation.
High thermal performance 34-mm multi-chamber polyamide thermal breaks of German company Technoform are used in frame and transom profiles. Transom insulating chamber is filled with foamed inserts from low thermal conductivity material. High impermeability level of the construction is reached through the use of four-contour kit of gaskets. All of it allows to raise fasade thermal performance and to reach «frame–frame» thermal transmittance level of Uf=2,25 W/(m²°K) and transom assembly unit is Uf=1,55 W/(m²°K).
High impermeability level of the construction Air and water permeability requirements for fasade elements structures are connected with the differential pressure between the inside and the outside of the building on big heights and determine the use of multi-contour gasket kit and overlapping principle of gaskets.