Made from thin plate steel or stainless steel in different dimensions and design, manual - semi-manual or automatical operation. Weather tight with brush system or water tight with CCJ inflatable gasket system. Optionally electronical motor, CCJ inflatable gasket, operated by PLC control unit. A wide range of features can be adjusted, switches for aircondition system and signal to the bridge for open door. All kinds of glass can be mounted - monolithic - double - sound reduction - energy saving - fire retardant glass all according to classification requirements. All frames delivered with preservation, i.e. corrosion class 4, ISO standard, optional in final RAL colour according to design or in high polished stainless steel.