The offered system of structural glazing is designed for manufacture of translucent facades without visible fastening of glass units. The filling is fixed from the filling end, the space between glass units is fitted with thermal insulation materials, from the outside the joint is made off with silicone sealant or gasket. This system is based on ALT F50 transom-post facade system.
ALT F50 SG glass unit structure.
To produce facades with structural glazing it is necessary to use special glass units that includes U-profiles with attached double stick tape AYPC.F50.1702 and secondary structural silicone sealant (e.g., Dow Corning 3362 and 3793, Sika IG-16 и IG-25). The adhesive surface of AYPC.F50.1702 profile allows its fast and easy installation across the entire perimeter of inner glass, then the space between the glass at the glass unit's end is filled with secondary sealant. ALT F50 SG system provides for the application of a wide range of glass: inner glass 6, 8, 12 and 14 mm thick, outer glass 6-12 mm glass, which eventually makes it possible to create facades with glass units of large area.
After installation of the post-transom framework, the glazing of the facade starts. Prior to installation of glass units, clamping elements are installed into the U-profiles grooves. Then the filling is installed on support plates, and end clamps are fixed in the central groove of the pos and transom using trim-head screws Ø 5.5 DIN 7982. Based on the results of tests the maximum tear-out bearing capacity of attaching point consisting of a clamp and two screws exceeds 1000 N. Across the entire perimeter of the glass unit there are more than 10 of such points. This ensures safe fixation of the filling in the structure and exclude its accidental falling out.
Glass unit installation procedure.
At subsequent stages thermal insulation materials are installed into the glass unit lock seam area and the decorative make off of the joint takes place. Well known clamping bars and covers of classic post-transom system are replaced with decorative joint sealant (FRK47 and FRK48), or with silicone sealant (e.g., Dow Corning 797 or Sikasil WS-304) resistant to different weather exposures.
To provide "conditionally cold" areas a combination of aluminum and PVC profiles is provided in the system. The Aluminum profile serves as a guide for the clamping element, the PVC profiles is designed to reduce heat losses, align gap between the glass and aluminum frame, and, as required, to install a sheet material panel behind the glass. The PVC profiles is attached to the aluminum frame assembled with angular embedded components.
This frame structure is attached to glass using silicone sealant (e.g., Dow Corning 995 and 895 or Sikasil IG-18 and IG-20). The resulting glazed unit, just like a glass unit, is fixed with the help of clamping elements.
If appropriate, sheets made of composite materials, aluminum or stainless steel may be used as a filler in impervious area. In this case the materials are attached using double stick tape 3M G23F and B23F.
To provide safety ALT F50 SG system has securing components AYPC.F50.1946 and AYPC.F50.1948 that ensure mechanical support of the outer glass and prevent the filler from falling out in case of earthquakes, hurricanes and other force-majeure circumstances.
To produce jut facades and various angular transitions, ALT F50 SG system uses angular clamping elements, that enables rotation of the space frame on one post at any angle from -90º to +90º.
ALTF50 integrated window construction is offered as an opening component in structural facades, which proved itself as one of the best solutions for post-transom systems. The appearance of such a window in closed position is practically indistinguishable from blind parts of stained glass, thus providing a uniform "glassy" layout of the entire structural facade, free from clamps and decorative covers.
ALT F50 SG structural glazing system has a number of competitive advantages:
Manufacture of constructions of various configurations and degree of complexity (straight, angular, jut, tilted).
Wide range of fillers: glass units from 26 to 40 mm with glass 6-14 mm thick, or single-piece glass and sheet materials for impervious areas.
Simplified manufacture of glass units: preliminary attachment of U-profile to the inner glass significantly reduces the assembly time of structural glass units.
Easy installation of glass units: preliminary installation of clamps into U-profile groove facilitates the installation of the glass unit into the facade frame.
Installation of super-heavy fillers: swiveling combination of bottom plates for heavy glass units enables installation of large-size filler up to 400 kg with glass up to 14 mm thick.
Two variants of joints make off between glass units: silicone sealant or gaskets FRK47 and FRK48.
Two variant of glass units fixing in "concealed sash": attaching on silicone sealant or using a set of gaskets and skirting profile.
Good thermotechnical properties: with filler 26 mm thick, the heat conductivity of integrated window standard section is 2.7 W/m2*ºK; for structural glazing this value is 1.4 W/m2*ºK.
Assembly using swiveling embedded trapezoid (triangular) frames and installation of non-rectangular single-piece fillers into impervious areas of facade.
Development of subobject solutions: application of two-chamber glass units in structural glazing, capability to install fillers up to 52 mm thick and etc.