Unitised Curtain Wall Beaded

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1 Unitised Curtain Wall Beaded Glazed Frame Unitised Curtain Wall Reference Brand: Sapa Building System Elegance 72 GF GENERAL DESCRIPTION Unitised curtain wall system using glazing beads for glass retention. The combined sightline dimension of the modules is 72 mm; the intermediate transoms are either 72 mm or 52 mm wide. The modular concept consists of factory manufactured and easily installed units. This offers the benefits of consistent quality in manufacture and site work, as well as savings on site preliminaries and access. Design possibilities include a wide range of decorative cover caps (bull nose, rectangular, aerofoil, etc), that can be different for horizontal and vertical application. Several designer mullions are available for internal design features. Mullions and transoms can be flush at the inside or can be specifically different to emphasize the vertical design of the building. Several situations such as 90 angle mullions or variable angles have been designed with a minimal use of materials, creating slim sightlines. Opening lights can be integrated without compromising these design aspects. The system can incorporate solar control devices and building integrated photovoltaics (BIPV). A large range of profile depths is available to cover significant spans and heavy glass loads. The drainage solutions ensure water tightness under most demanding climatic conditions. Applications: Suitable for major commercial and residential buildings. PERFORMANCE Thermal insulation EN ISO Ucw < 1,6 W/m²K with glass U g = 1,1 W/m²K Air permeability EN A4 (600 Pa) Water tightness EN R1500 (1500 Pa) Wind Resistance EN Pa Impact test EN E5

2 TECHNICAL DESCRIPTION Profiles: All frames and other profiles to be extruded in aluminium alloy to EN755 9: 2001, specification 6060 T6; tolerances in accordance with EN 12020, except wall thickness (+/ 0,15 mm) and profile dimension (+/ 0,15 mm to +/ 0,6 mm). The modular panels are composed of tubular aluminium profiles at the perimeter, generating a combined sightline of 72mm once installed. The internal transoms offer a sightline of 72 mm. The glass is clamped to the perimeter profiles by means of glazing beads. The curtain wall can be executed as a vertical linear or facetted surface. The system is also compatible with additional stick type single mullions and transoms located within the modules. Sightline is 52 mm in this case. The following test certification is available for the system a certificate related to the functional performance of the system (including air, water and wind tightness). a certificate on the connection between profiles and thermal insulation components. Copies of these certificates and test reports are available for presentation at the request of the specifier or client. The structural profile walls have a nominal thickness of 2,2 mm. The profiles at the perimeter consist of a tubular profile incorporating drainage channels, grooves to retain glazing gaskets and a groove into which the glazing beads are hooked. The profile chamber can accept aluminium or galvanized steel tube reinforcement. Profile depth depends on the inertia required related to the loads imposed (glass, wind and horizontal deadload). If required, the internal profiles can be flush with the perimeter. The glazing beads hook into a continuous groove extruded within the perimeter profiles. The glazing rebate height of the profiles is 21 mm. Surface treatment: Available finishes include anodising and polyester powder coating or a combination of both. Application is carried out through a Qualicoat /Qualanod certified applicator. Colours : anodised 20 microns either standard (code) or black ( code) or bronze (code) or gold (code) Polyester powder in RAL colour:... with finish of either matt (30% under 60 angle) or satin (70% under 60 angle ) or gloss (90% under 60 angle) 2

3 TECHNICAL DESCRIPTION (cont). Thermal break: The thermal insulation is achieved through: multi chamber insulation strips made out of polyamide 6.6, with 25% minimum glassfibre reinforcement and PE adhesive strips. The width of the insulation strips is 28 or 36 mm. In no case are other products allowed. The assembly of thermally broken profiles is carried out exclusively by the system supplier and not by the fabricator. an external continuous (EPDM) fin gasket at the perimeter of each module an intermediate (EPDM) fin gasket, clipped to the vertical insulation strips in order to seal the space between the modules and also act as a thermal barrier. Connections: Assembly of modules: The corner connections between the mitred perimeter profiles are achieved by either crimping, by means of eccentric fasteners, or by means of conical pegs. Internal 72mm transoms are connected to the perimeter profiles by the one of the following methods at the interior tubular elements: either 4 stainless steel screws that fit into the screw channels incorporated in the transom, clipped to extruded T connectors or screwed to extruded T connectors, and at the exterior parts by means of frontal screwed connections and a stainless steel T connector. Internal 52mm transoms are connected to the perimeter profiles by one of the following methods: either clipped to extruded T connectors, screwed to extruded T connectors or a frontal screwed connection. The following transom / mullion connections are used according to size weight and loading parameters: either notched transom screwed onto plain mullion or notched transom screwed onto recessed mullion The assembly of the internal 52 mm mullions and transoms is carried out dependant on the selection of mullion and transom profile and in accordance with the instructions of the system supplier Each connection technique requires the appropriate sealing accessories. 3

4 INSTALLATION AND GLAZING Alignment of the modules: The perimeter profiles incorporate a perimeter U shaped channel that accommodates galvanized steel alignment / hanging brackets fixed with stainless steel M6 screws. A PVC distance plate is inserted between the perimeter profile and the alignment / hanging device. Adjacent panels are aligned vertically and connected via the brackets, which are also used to suspend units whilst craning into position. Glazing: Infills with thickness from 6 to 50 mm can be integrated. Glazing gaskets are made of EPDM, according to EN The external glazing gaskets are always identical in depth as the outer surface of the glazed infill is on a consistent plane. The inside glazing gaskets supporting each of the panes are selected according to the thickness of the glazing infill and glue welded at the connection point. Drainage and ventilation: Drainage and ventilation at the perimeter of the module The system is field drained. Watertightness is achieved through 3 level movement gaskets with dry connection and no wet materials. Drainage and ventilation of transoms and mullions within the module The system allows for 3 levels of mullion drainage. The drainage method selected should be in accordance with the test reports and manufacturing instructions of the system supplier. Sufficient ventilation should be incorporated for the purpose of effective drainage. At the bottom edge of the curtain wall an EPDM membrane is installed behind the inner drainage level in order to evacuate all drainage water. Movement: The system is able to accept tolerances and movements caused by thermal expansion, without compromising on the weather performance. The system accommodates horizontal expansion of 14 mm per joint and vertical expansion of 10 mm per joint. This is achieved via the combination of: dual vertical expansion gaskets tubular horizontal expansion gasket anchors that allow for both horizontal and vertical expansion 4

5 INSTALLATION AND GLAZING (cont) Installation and fixing : The modules are connected onto the structure by means of appropriate fixing brackets in aluminium or galvanized steel. The anchoring of the curtain wall to the structure should be designed such that movements of the building are not transferred to the curtain wall. Furthermore the curtain wall should be able to expand and contract independently of the structure. The specialist contractor should provide calculations for anchoring. Anchoring is executed through slots within the fixing bracket allowing for a three dimensional positioning. The fixing bracket design should allow for perpendicular alignment of the curtain wall irrespective of the alignment of the structural floor slabs. A sealing membrane (butyl, EPDM,...) is installed between the inner structure and the drainage level of the curtain wall. This membrane ensures water and wind tightness and is welded or bonded in the corners. At the outside of the curtain wall construction the building connections depend on the peripheral materials used. The building connections take into account the type of materials involved and their thickness. If aluminium profiles (standard profiles or folded sheet) are used, the connection should always include sealing tape and a flexible joint. 5

6 CROSS SECTIONS Vertical panel joint (mullion) Horizontal panel joint (transom) (above), integral transom (below) 6