Curtain Wall Stick System (Capped)

Transcription

1 Curtain Wall Stick System (Capped) Stick Construction Capped Curtain Wall Reference Brand: Sapa Building System Elegance 52 ST GENERAL DESCRIPTION Grid based thermally insulated curtain wall system with clamp and clip outer profiles for transparent, contemporary building design and construction. The system offers a conceptual freedom thanks to a wide range of internal and external design features. Suitable for vertical, sloped and roof applications. Both horizontal and vertical profiles show a visible sightline of 52 mm. A large range of profile depths is available to allow for variation in span and loading, and heavy glass loads. The 3 level compartmentalized drainage solutions ensure water tightness for special configurations under most demanding climatic conditions Applications: Suitable for single storey to high rise commercial and residential buildings. PERFORMANCE Thermal break : 4 36 mm Thermal insulation EN ISO U cw < 1,7 W/m²K with glass U g = 1,1 W/m²K Air permeability EN AE Pa Water tightness EN RE Pa Wind Resistance EN Pa 3000Pa Acoustic with glass 6/15/4 R w (C;C tr ) = 34 (O; 2) db with glass 10/15/6 R w (C;C tr ) = 36 ( 1; 2) db with glass 12/16/44,2 R w (C;C tr ) = 42 ( 2; 5) db Impact test EN E5/I5

2 TECHNICAL DESCRIPTION Profiles: All frames and other profiles to be extruded in aluminium alloy to EN 755 9: 2001, Specification 6060 T6; tolerances in accordance with EN The aluminium profiles have a construction width of 52 mm. The structural element is located at the inside of the curtain wall and is composed of vertical and horizontal tubular profiles, upon which glass and/or panels are mounted and retained by means of aluminium pressure plates. Decorative external cover caps are clipped to the pressure plate to offer a variety of visual treatments. This structure can be executed as a vertical or sloped surface. The system is part of a modular concept, with interchangeable components. The following quality certificates are available for the system Weather, acoustic and impact tests in accordance with EN and CWCT standards and test procedures, undertaken at accredited independent test facilities (Notified Bodies). Copies of these test reports must be available for immediate presentation at the request of the architect. The structural profile walls have a nominal thickness of 2,2 mm. The mullions consist of a tubular profile incorporating drainage channels, grooves to retain glazing gaskets and a groove to retain the thermal insulator and accommodate fixing of pressure plates. The profile chamber can accept an additional aluminium or a standard galvanized steel tube reinforcement. Mullion depth ranges from 18 to 250 mm, depending on the inertia required related to the project design windloads. Transom profiles depths range from 6 mm to 150,5 mm depending on the inertia required related to the loads imposed (glass, wind and horizontal deadload). If required, the inner face of the transom can be flush with the inner face of the mullion. Pressure plates are fixed by means of stainless steel screws and locking rings of EPDM into the continuous channel of the base structure with a distance of 250 mm maximum. Screws are fixed with a torque between 3,5 and 4,5 Nm to guarantee an optimum clamping of glass and/or panels. Subsequently the aluminium cover caps are clipped onto the pressure plates. Cover caps have an outside width of 52 mm. Vertical and horizontal caps have different depths in order to obtain a correct interface. The vertical cover caps have the following features: rectangular shape with a total depth of 18 mm minimum. The vertical cover caps are clipped to the pressure plates without visible mechanical fixing. The horizontal cover caps have the following features: Rectangular shape, closed, water reject lip and a depth of 16 mm Optional cover cap shapes such a H or aerofoil are available. 2

3 TECHNICAL DESCRIPTION (cont) 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 : anodised20 microns either standard (code) or black ( code) or bronze (code) or gold (code) Polyester powder to AS3715 using a powder certified to Qualicoat Class 2, in RAL colour... with finish of either matt (30% under 60 angle) or satin (70% under 60 angle ) or gloss (90% under 60 angle) Thermal Insulation: Thermal isolation is achieved through a continuous insulation profile in ABS that is attached to the underlying aluminium structure. The depth of the insulation profile varies according to the required thermal properties of the curtain wall and the thickness of the infill. Connections: The assembly is carried out dependant on the selection of mullion and transom profile and in accordance with the instructions of the system supplier. Possible connection techniques are the following: screwed zamak T connector clipped zamak T connector screwed extruded T connector screwed connection Each connection technique requires the appropriate sealing accessories. The system allows for transom connections in the sloped condition and mullions in facetted structures. 3

4 TECHNICAL DESCRIPTION (cont) Glazing: The glazing rebate is 21 mm in depth. Glass and panels with thickness from 4 to 50 mm and with a maximum pane weight of 500 kg can be accommodated. Inner and outer glazing gaskets are made of EPDM, according to EN Inner glazing gaskets are selected according to the thickness of the glazing infill and glue welded at the connection point. The outer glazing gaskets are always identical as the outer surface of the glazed infill is on a consistent plane. Special outer and inner glazing gaskets are used for facetted curtain walls with inner and outer angle up to 15 (one sided). Drainage and ventilation: The system allows for following connection principles between the horizontal and vertical profiles: notched transom screwed onto plain mullion notched transom screwed onto recessed mullion straight cut transom mounted between the mullions The system has 3 levels of drainage allowing discontinuous mullion configurations. The depth of the drainage step is as follows: 15 mm minimum vertically, 4 or 5 mm horizontally. The drainage method selected should be in accordance with the test reports and manufacturing instructions of the system supplier. The system is either field or mullion drained or a combination of both. Sufficient ventilation of each compartment should be incorporated for the purpose of effective drainage. A moulded drainage spout is located at the junction of adjacent mullion profiles when employing mullion 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. 4

5 TECHNICAL DESCRIPTION (cont) Movement: Thermal movement : At a temperature difference of 40 C a thermal movement of 1 mm/m should be taken into account for the aluminium profiles. The thermal movement of the transoms is accommodated through slotted fixing holes and EPDM sealing pieces at the end of the transom. The expansion and contraction of the mullions is achieved through an aluminium spigot. These are inserted into the chamber of the two adjacent mullions. Dependant on the direction of the movement,, the expansion profile is screwed into one of the two mullion profiles. The visible side of the expansion joint is filled with silicone. Water tightness is ensured by 2 aluminium inserts siliconed into the upper mullion drainage channels. Building movement: The mullion is split in order to allow for sufficient settling. Installation and fixing: The mullions 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 so 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. In the case of continuous mullions with anchoring on multiple bearing points, 1 anchor must be fixed as a weight anchor and the others have a sliding function by means of slots. 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 glued 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 Typical Mullion: Typical Transom: 6