Essentially, the â€œ Stick Curtain Wall Systemâ€ is constructed on site using aluminum profiles to create a grid of transoms and mullions all mechanically connected. The majority of the work is ex-factory and the installation starts at the bottom of the faÃ§ade and proceeds upwards. Aluminum components are attached to galvanized steel brackets which have been accurately pre-fixed to the structure.
Stainless steel screws and bolts are used in order to prevent anodic reaction between steel and aluminum. Stick System Technology is relatively simple and competitive, although its competitiveness today is somewhat offset by relatively high labour cost and slow pace of installation. All glass has to be installed on site and extreme care must be exercised to ensure that all joints are perfectly sealed with appropriate materials. In general, it is more difficult to incorporate â€œrainscreenâ€ principles and pressure equalization into a typical stick system design. Furthermore, this type of Curtain Wall construction may require external scaffolding and this will, for practical purposes, limit the effective height of the faÃ§ade. It is not an appropriate technology for â€œfast trackâ€ construction schedules and progress can also be negatively affected by adverse weather.
In terms of aesthetics, the stick system depends on pressure-plates to contain the vision glass and the spandrel panels. The pressure-plates, in mill-finish aluminum, have to be concealed by â€œsnap-onâ€ covers which project beyond the plane of the glazing and are a strong visual characteristic of the system. A provision of weep-holes and drainage-slots is included to allow water to drain to the exterior.