Last saved by: Erdmann, Christina

Schüco AOC 50 ST, a thermally insulated aluminium add-on construction on a steel load-bearing structure (gasket system)
as a mullion/transom construction for multi-storey façades with an outer face width of 50 mm

Design features:
The isolation zone is designed in accordance with the Ucw specifications for the component.

Load-bearing structure:
With regard to the fabrication and installation tolerances, the substructure for the add-on construction described below must be constructed in accordance with the specifications of the system supplier rather than those of the DIN.
The contractors of the two trades must agree on the tolerances required for the substructure following the award of the contract.

Select
The load-bearing structure of the façade construction must be constructed from steel rectangular profiles / steel beams.
or
The load-bearing structure of the façade construction is constructed from steel rectangular profiles / steel beams on the construction site.
End
Vertical façades and skylight constructions with shallow roof pitches up to 7° can be constructed. 
The load-bearing steel structure is positioned on the room side. The calculation and design of the welded construction must be in accordance with DIN EN 1993 (Eurocode 3). When designing the construction, DIN 1055 (Design loads for buildings) and "Technical regulations for the use of glazing with linear supports" (DIBt) in the version dated August 2006 must also be observed. 
Thanks to an adjusted range of glazing supports, glass loads up to 11.9 kN can be carried. 
With segmented façades, the width of the steel profiles cannot exceed 60 mm if the installation of insert units is planned.
Steel structures must be protected from corrosion in accordance with the VFF information sheet St.01 "Coating of steel components in metal fabrication".
The steel profiles must be prepared for painting on the construction site. The contractor carrying out the painting must be informed that the profile surfaces must be cleaned and primed before painting.
The glazing system consists of cover caps and/or pressure plates made of aluminium (clamped connection). The connection between the pressure plates and the load-bearing structure must be carried out in accordance with the specifications of the general building authority approval.
The glazing system is connected to the load-bearing structure with rolled, galvanised steel base profiles with alternating holes welded on each side. The steel profiles have two rows of slots positioned 250 mm apart from each other. Unpunched steel base profiles can also be screw-fixed using EJOT Super Saphir self-drilling screws or fixed to the substructure using HILTI powder-actuated fastener technology. A corresponding aluminium basic profile can also be connected to steel hollow profiles via screw-fixing or fastening. Insulating tape should be used between the steel substructure and aluminium basic profile to prevent contact corrosion and expansion noises. A large volume EPDM gasket placed over this with an integrated ventilation groove and an installation height of 19 mm forms the base for carrying the glazing and ventilating the construction. Any number of door-head transoms can be produced thanks to the use of only one gasket for transoms and mullions. The joints of the horizontal and vertical gasket profiles must overlap and be sealed. Sealing components are used here to ensure safe installation. The respective alternating notches must be created in accordance with the fabrication guidelines of the system manufacturer.
Gaskets for attachment to the building structure are used to ensure airtight attachment to the building structure. 
Gasket injection technology with transom seal and Flex injection piece for secure sealing of the transom connection.

Glazing / insert units
All glass panes, including those of the insert units, must be arranged in the same plane. On the room side, the glazing gaskets made of black weather-resistant EPDM are installed at equal heights in the mullions and transoms.
On the outside, two single gaskets made of black weather-resistant EPDM are located at a height of 5 mm. Joint areas (transoms/mullions) must be fitted with stainless steel sealing sheets and corresponding joint sealing pieces made of microcellular rubber.

Ventilation:
The rebate base is ventilated and the vapour pressure is equalised across the four corners of each pane in the mullion rebate. 
To ensure that each field is drained and ventilated, appropriate openings must be made in the aluminium pressure plates, cover caps and gaskets. 

Dimensions and design of the external cover caps:
Cover cap (mullion) 	20 mm
Cover cap (transom) 	15 mm